highaltitude.log.20140129

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[00:10] <heathkid> hello everyone
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[00:45] <adwiens> hey heathkid
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[01:19] <nats`> night boyz !
[01:23] Action: Oddstr13 is compiling the ubertooth host tools & getting them running
[01:23] <Oddstr13> dependency hell! <3
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[02:40] <kd2eat> Evenin' all. How's the state of the High Altitude Union?
[02:40] <aadamson> kd2eat, make any progress... and I didn't watch, couldn't bear it...
[02:40] <kd2eat> lol.
[02:40] <aadamson> but I won't flood the channel with politics :(
[02:40] <kd2eat> Well, I did a few things.
[02:41] <kd2eat> I confirmed the resistance across the inductors in the LPF and choke seemed to match the data sheet.
[02:41] <kd2eat> I redid the XIN XOUT per your suggestion, and have it going into XIN now. Works fine.
[02:41] <kd2eat> I made the code changes you had pointed out in the si446x driver.
[02:42] <kd2eat> None of that seemed to substantially change the output power.
[02:42] <aadamson> perfect, that should be better, make sure you make the one related to the no additional capacitance
[02:42] <kd2eat> Today, on a whim, I added a call to set the PA_POWER+LVL manually to 0x7f. Interestinly, that seemed to have some beneficial effect. No idea why. It's the default.
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[02:43] <aadamson> can you look at the output on the pin to see what is it on a spec an/comm monitor?
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[02:43] <kd2eat> What do you mean by your comment on capacitance. I didn't follow that.
[02:43] <aadamson> I *think* there are some *defaults* in the eeprom, that *may or may not* be the documented defaults... these are loaded at startup.
[02:43] <aadamson> hang on let me find the code
[02:43] <aadamson> when you run with an external osc, you have to turn off the internal capacitance in the si chip
[02:44] <kd2eat> OK. So another potential code snafu if there's a glitch there.
[02:44] <aadamson> http://www.silabs.com/Support%20Documents/TechnicalDocs/AN785.pdf - see page 6
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[02:45] <aadamson> yes, I went through everything to make sure it was setup right and found 3 things...
[02:45] <aadamson> a command that si wants you to make that isn't documented... I'll give you a line here in a minute
[02:45] <aadamson> https://github.com/akadamson/STM32F3-SiRadio/blob/master/src/drv/drv_si446x.c
[02:45] <kd2eat> Oh dangit. I updated Adobe Reader but didn't reboot. May not be able to look at that doc. lol
[02:46] <aadamson> lines 281-283
[02:46] <aadamson> and 285 - 287
[02:46] <aadamson> make sure you add those
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[02:47] <kd2eat> Ooooh. Those definitely aren't in there right now.
[02:47] <aadamson> and lines 135-138 is where I added the remainder of the channel/radio setup, 134 is what it was, 135 sets either 25khz or 12.5khz channels, etc... I forget
[02:48] <aadamson> yeah and sorry that's stm32 code, but it follows the original avr/arduino code so you should be able to copy/paste and change the sendrecv command name and it work
[02:48] <kd2eat> Oh, cool.
[02:48] <kd2eat> Good stuff
[02:49] <kd2eat> If these fix it, I kinda wonder why it worked for the Pecan, though.
[02:49] <aadamson> if you haven't get the WD3 program from si, it's a little cryptic, but I used it to very chipsetup, etc
[02:49] <kd2eat> I think he was also on a Rev 1B chip.
[02:49] <aadamson> I'm *not* expecting it fix it, but it's can't make it worse...
[02:49] <kd2eat> Ahh lol
[02:49] <aadamson> oh, did you comment out those 2 lines in the original code?
[02:49] <aadamson> you are using a B1 right, not a B0?
[02:50] <kd2eat> Yes
[02:50] <aadamson> ok, comment out the lines at the top of your sendrecv... (hang on I'll get them)
[02:50] <kd2eat> I tried ripping out the line that adds one more byte on one-byte commands. Didn't help
[02:50] <kd2eat> Ya, I did that.
[02:50] <kd2eat> I also fixed the 0x11 vs 0x0b issue.
[02:51] <aadamson> ah good, yeah, remove those 2, there is actually only one command that it would have effected and so it doesn't matter... oh, wait there *is* one other thing that may make a difference
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[02:51] <aadamson> in the reset() code... at the beginning of it.
[02:51] <googBus_> hello
[02:51] <kd2eat> Evenin' googBus
[02:52] <aadamson> you need a delay(15) after the SDNdisable and before the part info command
[02:52] <googBus_> hi kD2Eat
[02:52] <aadamson> you can also comment out the part info, it doesn't do anything
[02:52] <aadamson> but the first command send after the sdn goes low, is not doing anything because it needs to wait for the chip to boot up.
[02:53] <kd2eat> OK. I see it.
[02:53] <aadamson> in your case that's the part info, in my case it was the power_up section.
[02:53] <aadamson> but that additional delay needs to be added
[02:53] <aadamson> see my code for reference
[02:53] <kd2eat> Gotcha
[02:54] <kd2eat> OK, so the delay(). Add the parameters to the frequency setting.
[02:54] <kd2eat> Dangit. I wish I had saved my code to github before I left the office. lol.
[02:54] <aadamson> and those 2 sections referenced above that you don't have
[02:54] <kd2eat> I'll cut/paste this chat into an email so I can do the code in the AM.
[02:55] <kd2eat> ya, those too.
[02:55] <aadamson> there ya go... :)
[02:55] <aadamson> never know if may make a difference..
[02:56] <googBus_> delays added in or subtracted must mostly make a difference
[02:56] <kd2eat> You had also commented that the RX circut could just be eliminated without detriment, correct?
[02:56] <googBus_> (a non-zero number theory infinity view in the sense of a hierarchy to the infinities)
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[03:01] <kd2eat> A coworker and I will hook the board back up to a spectrum anayzer (since the changes seemed to help a little) and see if the output power seems a tad better. It was sub-milliwat before.
[03:02] <kd2eat> I'll make these code changes as well.
[03:02] <kd2eat> I put an O-scope on the TX pin. It was showing 3.3v when in DC mode, and didn't really change much while transmitting.
[03:03] <googBus_> youguyz into safecast btw?
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[03:47] <brainles71> Morning
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[06:43] <x-f> bah, -25C windchill
[06:43] <x-f> morning
[06:44] <Upu> morning x-f
[06:44] <Upu> unsurprisingly rain here
[06:45] <x-f> morning, Upu
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[06:46] <x-f> is it ok to use the common ground for RF ground or should i use the dedicated RF ground pin?
[06:46] <Upu> common is fine
[06:46] <x-f> good, thanks
[06:47] <Upu> then you can use the ground planes for stuff like the -ve from batteries or solar panels
[06:48] <x-f> i see, good idea
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[06:56] <Chetic> woo! flightmode!
[06:56] <Chetic> maybe I'll actually be able to contribute something to a community for once
[06:57] <Chetic> a li'l ublox lib or something
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[07:50] <Joel_re> hey, whats the average descent rate
[07:50] <Joel_re> with the parachute
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[07:59] <x-f> Joel_re, 5-6 m/s at ground level
[08:10] <fsphil> you hope
[08:10] <Chetic> has anybody actually managed to set different baud rates for the raspberry pi uart input/output?
[08:10] <fsphil> at the same time?
[08:10] <Chetic> yes
[08:11] <Chetic> termios supports it but I guess maybe the rpi hardware doesn't
[08:11] <fsphil> in theory you can remap the second uart pin on the pi to the tx pin
[08:11] <fsphil> between the two uarts I mean
[08:11] <fsphil> it has two but they're both on the same two pins stupidly
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[08:12] <Chetic> oh? which device would the second uart be in raspbian?
[08:12] <Chetic> I'm currently using /dev/ttyAMA0
[08:12] <fsphil> I would imagine AMA1, but it might not be enabled by default
[08:13] <mfa298> you might need to poke something into the gpio memory to enable the 2nd uart
[08:13] <Chetic> interesting
[08:13] <Chetic> not sure if it's worth it though
[08:13] <fsphil> it's a real shame they didn't offer it on other pins
[08:14] <Chetic> yeah
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[08:19] <daveake> On the Pi the second serial can be mapped (in ALT 5 mode) to the GPIO pins, but only the same pins as used by the first serial port
[08:20] <fsphil> that's a better way to put it
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[08:23] <mfa298> could be an interesting test to see if changing the mappings would work better than switching baud. Although I don't know how well that would work when the ports are in use
[08:24] <fsphil> the OS shouldn't notice
[08:24] <daveake> Yeah the OS won't see it
[08:24] <fsphil> still a hack though. better to use I2C
[08:25] <fsphil> or audio drive the ntx2
[08:25] <daveake> or PWM
[08:25] <mfa298> or pwm
[08:25] <daveake> that :)
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[08:25] <mfa298> or bit bang if you really want to (but probably not from python
[08:25] <daveake> Eventually when the industrial Pi comes out, we'll have access to both serial ports
[08:26] <fsphil> Pi/2
[08:27] <daveake> extra filling
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[08:29] <Chetic> there's gonna be an "industrial" pi?
[08:29] <daveake> Yes Eben mentioned this a while back
[08:30] <Chetic> what's it for?
[08:30] <daveake> industrial applications
[08:30] <daveake> :p
[08:30] <Chetic> I mean features
[08:30] <daveake> Embedded into production stuff
[08:30] <daveake> Not sure he said
[08:31] <daveake> But obviously the form factor, with connectors everywhere, doesn't make it easy to embed
[08:31] <fsphil> it's basically a breakout board for the BCM chip
[08:31] <Chetic> heh nothing special I suppose
[08:31] <daveake> Well it does mean access to all the pins
[08:31] <fsphil> more useful from an embedding point of view
[08:31] <daveake> e.g. 2 serial
[08:31] <daveake> 2 cameras
[08:33] <Chetic> it wouldn't exactly be the first breakout board for an mcu
[08:33] <Chetic> but I guess if the price is nice etc
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[09:04] <LeoBodnar> morning *
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[09:05] <fsphil> morn
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[09:24] <mfa298> this industrial pi sounds like it could be good. Not having to rely on the SD card would be nice for some things.
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[09:25] <fsphil> I'm hoping they can put it into something more like the standard Pi too
[09:26] <fsphil> for some applications I like having all the headers and ports
[09:27] <mfa298> there's a few applications I can think of where having the 2nd stage loader and stable kernel on flash would be nice, then boot the main OS from NFS (possibly with some sort of fuse filesystem)
[09:27] <fsphil> yep
[09:27] <fsphil> that would be cool
[09:27] <DL1SGP> morning folks :)
[09:28] <fsphil> morning
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[09:41] <eroomde> there's an industrial pi?
[09:41] <fsphil> not yet
[09:41] <fsphil> and maybe better to call it a minimal pi
[09:41] <eroomde> yeah
[09:41] <fsphil> a yorkshire pi perhaps
[09:41] <eroomde> industrial would imply things that are very un pi-ish
[09:42] <mfa298> would be interesting to know how much has already been planned and how much we can influence it's design.
[09:42] <eroomde> like robustness
[09:42] <eroomde> sensible thermal management
[09:42] <eroomde> proper power supplies
[09:42] <eroomde> io protection
[09:42] <eroomde> 4 regularly spaced mounting holes
[09:42] <eroomde> support
[09:42] <eroomde> etc
[09:42] <fsphil> headers on at most two sides
[09:43] <fsphil> *sockets even
[09:43] <fsphil> they seem to have been placed at random in the current version
[09:44] <eroomde> yes
[09:44] <eroomde> it's not a good layout
[09:44] <mfa298> all the headers officially on the same side of the board.
[09:44] <eroomde> from a design pov
[09:44] <eroomde> it's just cheap (which is the design constraint, so fair enough)
[09:45] <fsphil> it's still the most friendly ARM system I have though
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[09:46] <eroomde> beaglebone!
[09:47] <fsphil> comes with a sort of weird cut down linux distro
[09:47] <fsphil> that you can't update
[09:47] <fsphil> unless you reflash it
[09:47] <eroomde> yes the angstrom thing is a heap of crap
[09:47] <fsphil> raspbian is basically a complete debian
[09:48] <eroomde> but you can easily put something decent on it
[09:48] <mfa298> when I was looking a while ago it looked like the fedora arm people are supporting the BBB but not the pi currently - not sure what the debian/ubuntu side are doing
[09:48] <fsphil> Fedora won't officially support the Pi due to some legal issue
[09:48] <eroomde> arch works on both i beleive
[09:49] <eroomde> freebsd certainly works on the beaglebone
[09:49] <eroomde> which is really splendid, as it's so complete and well documented, which comes into its own for embedded
[09:49] <mfa298> it looked like part of the fedora complaint was that the Pi is using an older arm chip, it looked like they're only supporting arm7 not arm6 (from memory)
[09:49] <eroomde> https://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handbook/driverbasics.html
[09:49] <fsphil> licensing issues with the GPU drivers
[09:49] <eroomde> it's that easy
[09:50] <fsphil> https://fedoraproject.org/wiki/Raspberry_Pi
[09:52] <eroomde> https://wiki.freebsd.org/FreeBSD/arm/Raspberry%20Pi
[09:52] <eroomde> that + the pi has got to be one of the best introductions to kernel hacking
[09:54] <SpeedEvil> eroomde: You mean the joy of a vendor that says 'What docs, there are no docs' ?
[09:54] <SpeedEvil> http://www.andahammer.com/t1-nanopc/ on a related topic.
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[09:58] <eroomde> SpeedEvil: yes that is a bit annoying]
[09:58] <SpeedEvil> The teeny freescale board looks fun too
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[10:02] <LeoBodnar> Just like everybody wanted to spin their own version of Arduino now everybody wants to spin their own Raspberry Pi (including Arduino clan.) This should hold industry in stagnation for another three years.
[10:05] <eroomde> am looking forward to the day when analogue design consultants can name their price
[10:06] <LeoBodnar> The thing is 90% of Raspberry Pi projects probably needs 10% of Arduino computing power.
[10:06] <SpeedEvil> To be fair - many of the pi 'clones' are significantly higher performaing that the pi.
[10:07] <SpeedEvil> Though often at moderately higher price points - and sometimes even with actual orderable parts!
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[10:19] <LeoBodnar> how do I unhide an airwire in Eagle?
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[10:21] <LeoBodnar> OK "ratsnest wirename"
[10:22] <LeoBodnar> How very intuitive
[10:25] <eroomde> yeah it's silly that
[10:26] <eroomde> before i learnt that i would do silly things like draw a polygon, name it with the wirename, right click, properties, show airwires
[10:28] <LeoBodnar> Nice business model where majority of your customer base hate your product
[10:29] <mfa298> as long as they hate the other products more it's a winning model :p
[10:29] <eroomde> must try kicad
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[10:33] <LeoBodnar> Eagle seems to have en easy inviting path to it and then dozens of dead ends and bear traps strategically scattered everywhere where every PCB designer WILL stray one day.
[10:34] <LeoBodnar> And the only way to figure them out is to go ask others. I hate having to go ask others.
[10:35] <adamgreig> use kicad already
[10:35] <adamgreig> I don't understand this weird stockholm syndrome thing people have going on with eagle
[10:36] <eroomde> said adamgreig, in between shoots for his american sitcom
[10:36] <adamgreig> the sooner you swap the happier you'll be
[10:36] <LeoBodnar> I have thousands of custom parts in libraries and hundreds legacy designs
[10:36] <adamgreig> and you can keep using eagle for your legacy designs
[10:36] <UpuWork> I LOVE EAGLE AND WILL DEFEND TO DEF
[10:37] <UpuWork> * It has many flaws most of which I know how to work around now
[10:37] <adamgreig> you can convert eagle parts to kicad parts anyway, so that's only a question of a moment's validation as you use a converted part for the first time
[10:38] <eroomde> 'a moment's validation' sounds like one of those expectation vs reality mistmatches that sometimes happen with FOSS
[10:38] <adamgreig> heh
[10:38] <adamgreig> maybe swapping to kicad would be a good time to throw out all those PIC footprints and start using ARM too :P
[10:38] <eroomde> wha eagle doesn't have, which i want, is differential pairs and meandering
[10:38] <eroomde> it claimes to have both but both implementations seem to be buggy
[10:39] <adamgreig> aiui kicad does have both to some extent, but the CERN work is focusing on making both features work very well
[10:39] <eroomde> yeah the promise of the cern stuff is nice
[10:40] <eroomde> but that could take forever to become mainstream
[10:41] <eroomde> i'll grab kicad from apt and see what happens
[10:42] <adamgreig> unless you're on a newish ubuntu I'd probably download the deb from kicad's site, I think the apt version was a few clicks out of date
[10:42] <adamgreig> the cern stuff is already in the dev releases
[10:42] <adamgreig> they're doing a good job of getting it integrated
[10:42] <adamgreig> some of it, I mean. they're still doing a lot of wokr
[10:43] <eroomde> i'm on 13.10
[10:43] <adamgreig> would hope that's reasonable then, dunno
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[10:44] <eroomde> they have provided a ppa
[10:44] <eroomde> which is nice of them
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[10:46] <eroomde> downloading
[10:46] <eroomde> let's see
[10:47] <fsphil> I'm as bad as kicad as I am with eagle
[10:47] <eroomde> what is making packages like adamgreig?
[10:48] <adamgreig> you make schematic symbols separately from footprints
[10:48] <adamgreig> both are pretty easy and nice?
[10:48] <adamgreig> I find making footprints in kicad much much quicker than eagle
[10:48] <adamgreig> it has somewhat better positioning tools
[10:49] <adamgreig> or at least they are easier to use
[10:49] <adamgreig> still wish it had constraint-based placement like any sensible CAD
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[10:49] <adamgreig> brb workshop
[10:51] <fsphil> there seems to be a disconnect between parts and their footprints
[10:51] <fsphil> which may actually make more sense than eagle
[10:53] <eroomde> oh the transline calculator is nice
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[10:58] <LeoBodnar> The problem with Eagle is that as soon as you have bought Eagle package there is no incentive for Cadsoft to keep you happy.
[10:59] <LeoBodnar> *not too much frustrated
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[11:00] <nats`> LeoBodnar you should really give a try to diptrace if you need a pro support
[11:00] <nats`> they are great and not expensive
[11:00] <nats`> they have a free version
[11:00] <nats`> pretty limited but working
[11:01] <nats`> kicad is great I use it extensively (every project since 2007)
[11:01] <nats`> but there are big limitation for RF and touchy design
[11:01] <nats`> the constraint editor is too limited
[11:01] <nats`> no diff pair management
[11:01] <nats`> and the worst part
[11:01] <nats`> you can't place a via where you want
[11:01] <nats`> (there are hack but they are dirty)
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[11:02] <eroomde> that sounds crap
[11:03] <nats`> that's a limitation the cern is working one
[11:03] <nats`> on
[11:03] <nats`> in fact the VIA is an element linked to the track
[11:03] <nats`> that's the problem
[11:03] <nats`> I tried some years ago to modify that in the code but it means a massive refactoring
[11:03] <LeoBodnar> There must be a world conspiracy around CAD design and secret society all CAD developers belong to
[11:04] <nats`> do you think they have pyramid tatto on the neck ?
[11:04] <nats`> :D
[11:04] <nats`> or diff pair on the leg
[11:04] <LeoBodnar> I think a bit lower than the neck
[11:04] <eroomde> yes, CAD is a sore point
[11:05] <eroomde> probably the only single reason left in the universe to justify the existence of windows
[11:05] <eroomde> (for mechanical cad anyway)
[11:05] <nats`> at the moment I have two cad really outstanding altium and cadence
[11:05] <nats`> diptrace is awesome
[11:05] <nats`> kicad defend himself
[11:05] <LeoBodnar> So when you join you swear to put at least five features that would make a product unusable/pain to use.
[11:05] <nats`> mentor graphics...... what a pain in the ass but works
[11:05] <nats`> and eagle.... should be called pidgin :p
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[11:10] <Hix> I'm not part of a scret society, nor do I have a pymaid tattoo on my neck :)
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[11:12] <eroomde> the separation of parts in schematic and layout is fine with me
[11:12] <eroomde> i often just want to design the circuit at the schematic stage, and play around
[11:12] <eroomde> and not actually pick parts until later
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[11:16] <LeoBodnar> Hix do you design CAD packages?
[11:17] <Hix> No I am a mech CAD monkey, though I am doing a bit of coding for CAD automation at work at the moment. I've looked into Catia API and it's not really a black art
[11:21] <LeoBodnar> Then you are not a danger to society
[11:26] <SpeedEvil> LeoBodnar: There is clearly not one CAD cabal.
[11:26] <SpeedEvil> I point you at blender.
[11:26] <SpeedEvil> There must be at least two.
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[11:28] <eroomde> the graphical rendering on kicad seems buggy as hell
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[11:30] <Hix> http://www.youtube.com/watch?v=B_Q6jMUdfYc genius
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[11:45] <Chetic> does running a ublox gps in airborne mode make it less likely to get a fix indoors?
[11:45] <mattbrejza> yep
[11:46] <mattbrejza> or at least longer
[11:46] <Chetic> I've had it running for quite a while
[11:46] <Chetic> but I'm not sure if I'm using this nmea lib incorrectly
[11:46] <mattbrejza> max6/7?
[11:46] <Chetic> max6
[11:46] <UpuWork> what antenna ?
[11:46] <Chetic> yours :]
[11:47] <UpuWork> Which one I sell many :)
[11:47] <UpuWork> does it have time ?
[11:47] <Chetic> I dunno the one that came with it
[11:47] <Chetic> pre-soldered
[11:47] <Joel_re> patch/chip?
[11:47] <Chetic> yes it states a time and date
[11:47] <UpuWork> if it has the time it can see the satellites
[11:47] Action: Chetic looks closer at the NMEA data
[11:49] <Chetic> it says it can see 3 satellites
[11:50] <Chetic> elevation and azimuth field for those 3 satellites is empty though
[11:52] <mattbrejza> use u-center, its pretty good for displaying all this data
[11:52] <eroomde> how long Chetic?
[11:53] <eroomde> has it been sitting there waiting to lock
[11:53] <Chetic> yeah mattbrejza, it's fantastic
[11:53] <Chetic> eroomde: well I just moved it closer to the window so 10 minutes
[11:53] <eroomde> ok
[11:53] <Chetic> but before it was an hour or so
[11:54] <eroomde> i'd restart it, near the window, and give it 15 minutes
[11:54] <eroomde> if it failed after that, could be a problem
[11:54] <eroomde> fails*
[11:55] <Chetic> well it's cloudy and I'm at the bottom of a tall building next to another tall building :p
[11:55] <Chetic> gonna have to try at home
[11:55] <eroomde> urban canyon
[11:55] <eroomde> v crappy environment
[11:56] <mfa298> how close is the gps to other electronics ?
[11:56] <Chetic> haha
[11:56] <eroomde> you might have some polish truck driver parked around the corner with a jammer, for all you know
[11:56] <Chetic> lots of power outlets 20cm away
[11:57] <mattbrejza> the ublox also has a jamming indicator and noise level monitor
[11:57] <Chetic> usb hub 10cm away
[11:57] <Chetic> ethernet cables all over
[11:57] <Chetic> oh snap, jamming indicator?
[11:57] <mattbrejza> although none of those indictors expalin my ublox 7 issues
[11:57] <mfa298> I found the ability to get a lock indoors when the gps moved from breadboard near the Pi to being on PCB above the pi (likely due to extra noise)
[11:57] <nats`> eroomde they are switching to cairo :)
[11:57] <Chetic> I work with embedded systems
[11:57] <Chetic> we have all kinds of freaky radio equipment
[11:58] <mfa298> add a "dropped" into my sentence above
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[11:58] <Chetic> should the antenna be pointed up or horizontal?
[11:58] <mattbrejza> if you get the ubx protocol winodw thingy up its under monitor or something like that
[11:58] <daveake> Yeah needs to stay away from the Pi and in particular the Pi camera cable and then in particular if the camera is in video mode
[11:58] <mattbrejza> also see if your phone can get gps lock
[11:58] <Chetic> I will only be taking still pictures, fortunately
[11:58] <Chetic> good idea
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[12:00] <mfa298> Chetic: you shouldn't need a huge seperation. Just don't have the GPS right next to the Pi (if that's what you're doing)
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[12:00] <Chetic> oh now it seems to have a lock
[12:01] <Chetic> I guess never mind?
[12:01] Action: Chetic investigates
[12:02] <Chetic> yup!
[12:02] <daveake> Lock always takes longer a) first time and b) when you're launching
[12:02] <Chetic> and I am somehow giving nmealib incorrect nmea
[12:02] <Chetic> haha
[12:03] <Chetic> I think I'll use gpsd and pipe gpspipe to nmealib through my program
[12:03] <mfa298> and c) if you're watching the nmea output
[12:03] <Chetic> lol
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[12:13] <balooga> hello. how can you get a typical telemetry string to paste into the parser configuration?
[12:14] <balooga> im trying to fill out the payload configuration form and stuck on the parser bit
[12:14] <mfa298> in terms of the habhub payload doc configuration the example string needs to come from your payload.
[12:14] <mfa298> if the string you put in doesn't match you're payload it wont work
[12:16] <balooga> i don't have my own radio receiver so we don't have a typical string
[12:16] <mfa298> you presumably know what string your payload is generating.
[12:16] <gonzo_> you should know what you are trying to send though
[12:17] <mfa298> although some sort of radio receiver is an important thing to get (even an rtl-sdr) otherwise you don't know that the transmitter is working properly
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[12:18] <balooga> i thought it was possible to get someone else to track it and upload the flight path to spacenear.us
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[12:19] <balooga> we are filling out the payload configuration form on github
[12:20] <daveake> You've got to check that your tracker works first
[12:20] <daveake> and then you can fill in the form based on what you've programmed your tracker to send
[12:20] <balooga> but what if you dont have a radio
[12:20] <mfa298> you need to be sure that what you're transmitting is decodeable before flight.
[12:20] <daveake> then it will all fail miserably
[12:20] <ibanezmatt13> get one
[12:20] <mfa298> finding out there's a bug in the tx software after you've released it doesn't give much chance to fix it!
[12:21] <daveake> There's an important word here which might need repeating
[12:21] <brainles71> any recommendations on a radio?
[12:21] <daveake> TEST
[12:21] <daveake> ^^ lots
[12:21] <mfa298> also don't rely on anyone to get data below 1km, If you want to recover it you need to be near to it as it comes down!
[12:21] <mattbrejza> https://www.cosycave.co.uk/product.php?id_product=288 balooga
[12:21] <brainles71> preferably one that transmits as well?
[12:21] <mfa298> brainles71: there's a list of radios people have used on the wiki (look at the tracking guide)
[12:21] <mattbrejza> (fine for testing, only rx)
[12:22] <brainles71> thanks mfa298
[12:22] <daveake> You *have* to have a receiver and decoder and aerial when you go chasing
[12:22] <daveake> Otherwise your last fix will be at 500m - 1000m
[12:22] <daveake> and you won't know where it's landed
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[12:22] <daveake> and you'll probably lose it
[12:22] <mattbrejza> and you will have a 200mx200m+ area to search
[12:22] <mfa298> in terms of radio for recieving the signals it doesn't need to have transmit capability (but most of the good ones do) you also *need* a license to use them to transmit
[12:23] <daveake> Personally I prefer to have a "real" radio for chasing, and you can get those s/h from £100 up
[12:24] <daveake> which will get you a decent radio scanner suitable for the task
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[12:24] <daveake> But please don't try to fly without testing and please don't go chasing without a radio
[12:24] <daveake> it'll all end in tears
[12:24] <brainles71> i would like to get one with a transmitter so i can launch bigger payloads and send cutdown commands
[12:25] <ibanezmatt13> Also, you might find when you're trying to locate it, a Yagi is helpful. But get a radio first oc
[12:25] <brainles71> rather buy what i need first up than spend $200 now and another $400 later
[12:25] <daveake> sure but Tx adds £100s
[12:25] <mfa298> even chasing with a radio and after testing can end in tears (when the expensive kit lands in the sea) but at least you won't be laughed at then.
[12:25] <daveake> not much :)
[12:26] <ibanezmatt13> that could be me in a few weeks...
[12:26] <craag> or trees...
[12:26] <mattbrejza> i think brainles71 has a somewhat bigger target than us though
[12:26] <daveake> ibanezmatt13, what you need is a launch site out west <cough>
[12:26] <mfa298> brainles71: worry about cutdown's later (if you don't have an Amateur radio license) you'll need to do some training for that first before you can transmit
[12:26] <daveake> haha
[12:26] <craag> haha daveake
[12:26] <brainles71> ill be getting that before i even launch
[12:26] <ibanezmatt13> daveake: I know! I can't fill H2 myself though :P
[12:26] <daveake> meh
[12:27] <craag> daveake: Do you have a booking system yet? :P
[12:27] <ibanezmatt13> Wouldn't that be good... ;)
[12:27] <daveake> I have all you need
[12:27] <daveake> craag lol
[12:27] <brainles71> mattbrejza: I'm in australia so your quite right
[12:27] <daveake> Good idea :)
[12:27] <daveake> I now have an hourly set up for the new place
[12:27] <daveake> Most of it is over land
[12:27] <brainles71> mfa298: i think getting my radio license would also help me learn a bit about radio.
[12:28] Action: ibanezmatt13 navigates to Google Maps
[12:28] <daveake> Which is new for this winter
[12:28] <daveake> http://predict.habhub.org/hourly/oldgore/
[12:28] <mattbrejza> what we need is some nice cold weather so we can launch
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[12:28] <mfa298> brainles71: in that case (being in Australia) if you're using the ukhas method (rather than aprs) you *definetly* need a radio receiver with you. There's not the same coverage of recievers that the UK and Europe has
[12:29] <daveake> no airborne aprs here of course
[12:29] <ibanezmatt13> daveake: very feasbile...
[12:31] <brainles71> mfa298: Ill probably be launching much later in the year. I'm not sure which system ill be using
[12:31] <brainles71> looks like maybe aprs at this stage
[12:31] <brainles71> we shall see
[12:34] <Darkside> mfa298: depnds where it goes
[12:34] <Darkside> APRS is pretty good here
[12:34] <Darkside> espcially at 500m and up
[12:35] <brainles71> cheers Darkside
[12:35] <brainles71> Horus is pretty much the template for what I'm doing
[12:35] <mfa298> Darkside: the initial question was about what to put into the payload doc generator, ARPS would probably make for a sensible addition for there.
[12:36] <Darkside> well there needs to be a backend systm to pull APRS-IS data and put it onto the trackr
[12:36] <Darkside> at th moment thats a very manual process
[12:36] <nats`> someone here already used a mini-vna (especially with the extender to 1.5GHz)
[12:36] <Darkside> we run a script to do it
[12:36] <nats`> ?
[12:36] <Darkside> nats`: yeah
[12:36] <Darkside> they are awesome
[12:36] <Darkside> buy on
[12:36] <Darkside> buy one*
[12:37] <nats`> awesome like awesome ?
[12:37] <Darkside> yes
[12:38] <Darkside> obviously not as good as a top of the line VNA
[12:38] <Darkside> but for the price, it damn usful
[12:38] <Darkside> i used one to tune some 70cm beams
[12:38] <nats`> I'll maybe give it a try I'm not sure I want to end with a 30kg Agilent in my bedroom
[12:38] <nats`> I don't have space anymore
[12:38] <Darkside> yeah the minivna pro + extender is grat
[12:38] <Darkside> great*
[12:39] <Darkside> highly recommndd
[12:39] <brainles71> i learn something new everyday on here
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[12:40] <nats`> Darkside I'll give it a try :)
[12:40] <nats`> I have some stuff to design soon and the vna will be mandatory
[12:46] <brainles71> nats` Darkside so a VNA is used figure out what channel your tracker is broadcasting on and tracking any drift that occurs?
[12:49] <mfa298> brainles71: VNA's are used to measure how antennas etc work. they're not needed for general HAB stuff
[12:49] <mattbrejza> it can, but thats like saying a ruler is used to measure the length of pencils
[12:50] <nats`> brainles71 simple explaination the VNA have an emitter and compare what it transmit and what it receive
[12:50] <nats`> so you can know what your setup is modifying
[12:50] <mattbrejza> they also start at £20k (for a proper one)
[12:50] <nats`> mattbrejza I think you're under the truth ;)
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[12:50] <brainles71> ok so useful but not really necessary
[12:50] <nats`> if we consider ZVL is the basic for that it's more 35k :D
[12:51] <mattbrejza> may be a less known brand is 20k
[12:51] <Geoff-G8DHE-M> http://ukhas.org.uk/general:beginners_guide_to_high_altitude_ballooning
[12:51] <mattbrejza> or am i just thinking the cost of the cables and the cal kit :P
[12:51] <brainles71> Mini VNA 349.00 ¬
[12:51] <brainles71> http://www.wimo.com/instrumentation_i.html
[12:52] <nats`> brainles71 it's clearly not a pro grade stuff
[12:52] <nats`> :)
[12:52] <brainles71> obviously
[12:52] <nats`> but enough for hobbyist
[12:52] <brainles71> exactly :0
[12:52] <brainles71> *:)
[12:52] <eroomde> there's a little AD chip that can measure gain and phase diff between two ports for a wide range of freqs
[12:52] <eroomde> the makings if a simple little VNA
[12:52] <nats`> eroomde that's what they use :)
[12:52] <brainles71> I'm not going pro
[12:52] <eroomde> but i'd sooner get a proper one
[12:52] <nats`> saying ZVL on this channel is summoning eroomde :)
[12:52] <eroomde> an old HP one would be a good thing
[12:52] <eroomde> yes it's true
[12:52] <brainles71> im just a dude who want to take photos in the upper atmosphere and learn about radio
[12:53] <eroomde> hoping to get the zvl this year
[12:53] <mfa298> brainles71: at this point in HAB a VNA probably isn't of huge use, if you start wanting to test the performance of feedlines and antennas it may be more useful.
[12:53] <eroomde> with the spec-an and nosie measurement options
[12:53] <nats`> take picture ! :)
[12:53] <nats`> eroomde don't forget to take the spectrum analyzer option
[12:53] <nats`> it's handy
[12:53] <mfa298> for something like seeing what frequency your payload is on an sdr will be better and cheaper.
[12:53] <eroomde> i just said that
[12:53] <nats`> oups yes
[12:53] <nats`> :)
[12:53] <eroomde> we have a huge field outside too
[12:54] <brainles71> mfa298: i have to get a radio, my license, a tracker too much to buy before i get to the fun stuff. A VNA can wait
[12:54] <eroomde> so will be good for open-field emf testing
[12:54] <nats`> you'll take the calkit too ?
[12:54] <eroomde> course
[12:54] <nats`> he's expensive but god he is really good
[12:54] <nats`> I dropped the previous agilent one to use on each of our equipment
[12:54] <eroomde> they might throw that in for free i hope :)
[12:55] <nats`> you're dreaming :p
[12:55] <nats`> they even make you pay for usb keyboard
[12:55] <nats`> -_-
[12:55] <eroomde> we get on well with our R&S rep
[12:55] <eroomde> he likes rocket engines
[12:55] <eroomde> always get good stuff from him
[12:55] <eroomde> like all the decode and triggering options thrown in for free on the scope
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[12:56] <nats`> that's nice !
[12:56] <eroomde> yep
[12:56] <nats`> we have the same with Lecroy
[12:56] <nats`> sadly they don't do VNA
[12:57] <eroomde> i do wonder why're so expensive
[12:57] <eroomde> or rather, so much more expensive than a spec-an
[12:57] <nats`> I maybe have an idea
[12:57] <nats`> the phase is a huge pain to measure
[12:58] <nats`> it's easy to compensate for power you loose in your design
[12:58] <nats`> but I believe that all their PCB are fully impedance matched etc
[12:58] <nats`> + they don't sell many of them
[12:58] <eroomde> yeah the quantity arguement seems likely
[12:59] <eroomde> phase angle doesn't seem so hard to measure
[12:59] <eroomde> maybe it is up at really microwaves
[13:01] <BrainDamage> calibration is a fucking pain in the ass
[13:02] <BrainDamage> it's not simply about "sweep the generator" because you need multiple loads ( short, open, bypass ) to be toggled while logging the data
[13:02] <BrainDamage> and all permutations
[13:02] <BrainDamage> on top of that you have to add that "open" at high frequency doesn't exist
[13:02] <LeoBodnar> I have hacked my Agilent to open all decoding and triggering
[13:03] <BrainDamage> so it has to be replaced with a plethora of additional loads for testing
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[13:03] <eroomde> is the key to that on page 19 in one post in a 39-page-and-counting forum post on the eevblog forum?
[13:03] <eroomde> .... which is the thing i find most annoying about the eevblog forum
[13:04] <LeoBodnar> quite possibly
[13:04] <eroomde> tiny nuggets of good in vast oceans of shit
[13:04] <LeoBodnar> forums are a waste of time
[13:04] <BrainDamage> so is irc :p
[13:04] <nats`> eroomde you should hate the internet so :D
[13:04] <BrainDamage> I bet if you check the SNR of most irc channels it won't be considerably better than a forum
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[13:05] <LeoBodnar> IRC is fleeting which is nice reminder of not typing too deep a stuff
[13:06] <eroomde> i am nearly at a million words
[13:06] <eroomde> which is a bit depressing
[13:07] <eroomde> according to zuesbot anyway
[13:09] <Darkside> lol
[13:09] <Darkside> wheres the channel stats?
[13:10] <eroomde> http://habhub.org/zeusbot/pisg.html
[13:10] <eroomde> eroomde spoke a total of 948638 words!
[13:10] <Darkside> i love the random quotes
[13:12] <Darkside> eroomde is either insane or just a fair op, kicking a total of 7 people!
[13:12] <daveake> /or/ ?
[13:12] <daveake> :)
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[13:16] <BrainDamage> "Trollence seemed to be hated too: 2 kicks were received"
[13:16] <eroomde> probably both by me
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[13:18] <balooga> has anyone tried launching with hydrogen?
[13:19] <UpuWork> yep more than Helium
[13:19] <balooga> if so how did it go?
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[13:19] <Lunar_LanderU> hello
[13:19] <UpuWork> up
[13:19] <UpuWork> as expected really
[13:19] <UpuWork> http://ukhas.org.uk/guides:hydrogen
[13:19] <eroomde> it makes sense to use hydrogen where you can
[13:20] <balooga> so no explosions?
[13:20] <daveake> none so far
[13:22] <eroomde> just don't smoke around it
[13:23] <balooga> i don't smoke
[13:24] Action: SpeedEvil lights balooga.
[13:25] <eroomde> you'll be fine then
[13:25] <eroomde> hydrogen is not that high on the list of scary pressurised gases
[13:25] <eroomde> just be safe
[13:25] <Hix> isn't it down to stoichiometric ratio
[13:25] <SpeedEvil> Hix: no
[13:26] <SpeedEvil> Hix: h2 has the widest flammability ratio of all the gasses
[13:26] <eroomde> yo - dlfldigi on ubuntu 13.10
[13:26] <SpeedEvil> iIRD something silly like 4%-94%
[13:26] <eroomde> is it a build from source?
[13:26] <Hix> ouch
[13:26] <SpeedEvil> cmmon gasses
[13:26] <SpeedEvil> common
[13:27] <BrainDamage> if you have a stochiometric mix then you have 100% of the gas burned
[13:27] <mfa298> eroomde: if you build from source you may want the zip file or an older commit - the latest in jcoxon's github seems to be worse at rtty than the older versions
[13:27] <BrainDamage> but you can achieve partial burning even with "incorrect" mixes
[13:27] <craag> eroomde: No, just add the ppa and downgrade the ubuntu version to 'raring' in the apt.d file.
[13:27] <SpeedEvil> having said the above.
[13:28] <SpeedEvil> Gettin 6% air in your hydrogen is _hard_
[13:28] <SpeedEvil> unless you are a complete and utter idiot.
[13:28] <SpeedEvil> Leaks are a much greater concern.
[13:28] <SpeedEvil> Actually - even if you are an idiot - you actually have to blow the balloon partially up with air
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[13:33] <eroomde> craag: ta
[13:33] <eroomde> easy peasy
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[13:41] <Geoff-G8DHE-M> Hi Lunar_LanderU, how did it go, or is later today ?
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[13:56] <DL1SGP> Hi Geoff-G8DHE according to nickname Lunar_LanderU is still in University at present :D so we might not get news back immediately... our fingers remain crossed!
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[14:41] <Lunar_LanderU> no tomorrow
[14:42] Action: DL1SGP uncrosses fingers for now
[14:43] <Geoff-G8DHE> Ah OK, best of luck for tomorrow then!
[14:43] <Oddstr13> i would assume that applying power to some H2O and capturing all gasses would result in a quite explosive mix :P
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[14:58] <Oddstr13> any HABs in the air at the moment?
[14:58] <eroomde> no
[14:59] <eroomde> the habduino one was just testing
[14:59] <eroomde> some other people on our site came over as they bought one but had nothing to receive it
[15:00] <Oddstr13> okay ^^
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[15:01] <Oddstr13> can't wait till my dvb dongle gets here! D:
[15:02] <Oddstr13> hm... i guess now is a good time to go and find the shortwave radio :P
[15:02] <mfa298> I just realised we're probably at a whole month since the last UK flights. It's been a while since we've had that long a gap
[15:03] <mfa298> Oddstr13: unfortunately the DVB dongles won't get much shortwace radio, most stop somewhere around 40Mhz (one type might make it down to 20MHz if you're lucky)
[15:03] <Oddstr13> mfa298: oh, ik
[15:04] <Oddstr13> i'm waiting for the dvb, but can play with the am radio for now :P
[15:05] <Oddstr13> http://habitat.habhub.org/mobile-tracker/ i'm in that light-grey belt atm :P
[15:05] <Oddstr13> any suggestions for frequencies to try?
[15:07] <Oddstr13> between 6-18MHz that is
[15:09] <Lunar_LanderU> thanks DL1SGP and Geoff-G8DHE
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[15:10] <DL1SGP> Most welcome Kevin
[15:16] <gonzo__> the wx has really been shitty for a while.
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[15:23] <Oddstr13> i think i found an indian radio channel or something :P
[15:23] <daveake> chapati music?
[15:26] <Oddstr13> duno what it's called :P
[15:26] <Oddstr13> i really need to set my self up for streaming :P
[15:27] <DL1SGP> which frequency are you listening on Oddstr13 :)
[15:28] <Oddstr13> a litle under 12MHz
[15:29] <Oddstr13> that is, more than 11.5 and less than 12
[15:29] <Oddstr13> National Panasonic Model no. RE-7860LBS
[15:31] <Oddstr13> http://www.hificlassic.ee/index.php?page=98&action=show_product_details&product_id=1283&group_id=14 <-- like that :P
[15:31] <Oddstr13> so, can't tell you the exact frequency :P
[15:31] <Oddstr13> also, i think that channel faded away for me :P
[15:32] <Oddstr13> now there's news in british english :P
[15:32] <DL1SGP> is there music right now?
[15:33] <Oddstr13> nope, that channel is gone for me :P
[15:33] <DL1SGP> ok might be end of transmission
[15:33] <Oddstr13> there is a lot of channels almost atop of eachothers there tho :P
[15:33] <DL1SGP> at 15.30 UTC
[15:33] <Oddstr13> yea, might be
[15:34] <DL1SGP> yeah that is normal do not worry :)
[15:35] <Oddstr13> i should move that radio, so it's a litle easier to put a computer right next to it :P
[15:38] <Oddstr13> i get something sounding kinda like a engine at several places on the shortwave band, any idea of what that might be?
[15:38] <DL1SGP> engine?
[15:39] <Oddstr13> a litle above 8.5 MHz
[15:39] <nats`> noise from your computer ? :D
[15:40] <DL1SGP> heh if you just tell me "a little above 8.5" that does not help me much cause I would pick up quite a few stations there of all sorts looking at the setup here
[15:40] <Oddstr13> lol, yea
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[15:41] <Oddstr13> i'll see if i can move the computer closer, and still be withinn range of the wifi
[15:41] <Oddstr13> nats`: also, noise from the computer wouldn't tune that specificly, would it?
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[15:41] <Oddstr13> sounds more like data of some sort
[15:44] <Oddstr13> now, this sawtooth sounding thing on the other hand
[15:46] Action: Oddstr13 moved the computer back away from the radio
[15:47] <nats`> Oddstr13 it could tune on a specific frequency if it's an oscillator or a pll
[15:47] <nats`> psu noise seems more like white noise but not totally
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[15:53] <Oddstr13> nats`: and laptop chargers sound like sawtooth waves or something such :P
[16:01] <Oddstr13> nats`, DL1SGP: http://satomi.openshell.no/tmp/am_recording_shortwave.wav
[16:02] <Oddstr13> afk a litle
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[16:27] <Oddstr13> any idea of what that might be?
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[16:29] <nats`> @work can't listen to it but remind me this evening
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[16:34] <Oddstr13> nats`: timezone?
[16:34] <nats`> france :)
[16:34] <nats`> gmt+1
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[16:35] <Oddstr13> so, around 20 sometime?
[16:36] <fsphil> it sounds like STANAG
[16:36] <fsphil> https://www.youtube.com/watch?v=-6UExlhaVdU
[16:36] <DL1SGP> yeah sounds like stanag
[16:37] <Oddstr13> so, encrypted stuff & not really interesting? :P
[16:37] <fsphil> aye
[16:38] <fsphil> not always encrypted
[16:38] <fsphil> but I suspect the interesting stuff is
[16:38] <Oddstr13> yep, that's definitly what i hear :P
[16:38] <DL1SGP> thete is STANAG at 8492kHz for instance
[16:38] <Oddstr13> yep
[16:39] <DL1SGP> 8505
[16:39] <DL1SGP> 8575
[16:39] <Oddstr13> that recording was from a litle under 8MHz i think
[16:39] <DL1SGP> 8620
[16:39] <DL1SGP> and so on :)
[16:39] <Oddstr13> is the ham-it-up any good?
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[16:44] <Lunar_LanderU> OK, time to go home
[16:44] <Lunar_LanderU> talk to you later°!
[16:44] <Lunar_LanderU>
[16:45] <Lunar_LanderU> :)
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[17:00] Nick change: ibanezmatt13_ -> ibanezmatt13
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[17:07] <eroomde> LeoBodnar: http://klabs.org/index_klabs_dot_org.htm
[17:07] <eroomde> this site is a total joy
[17:07] <eroomde> much worse organised even than the ukhas wiki
[17:07] <eroomde> but full of treasures
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[17:14] <LeoBodnar> cool, something for a rainy day
[17:14] <eroomde> yes
[17:14] <LeoBodnar> *reading now
[17:14] <eroomde> it's the website version of a coffee tabvle book
[17:14] <eroomde> also, it's raining
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[17:28] <SpeedEvil> http://www.scribd.com/doc/202863315/NASA-Lawsuit :)
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[17:55] <qyx_> uhm
[17:55] <qyx_> "old news" - new!
[17:55] <eroomde> ?
[17:57] Nick change: S_Mark_ -> S_Mark
[18:00] <qyx_> on that page
[18:00] <eroomde> oh
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[18:04] <nosebleedkt> yo
[18:05] <eroomde> no
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[18:46] <Lunar_Lander> evening
[18:46] <mclane> Hi
[18:46] <steve2e0vet> Evening
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[18:48] <mclane> what are your plans for a launch in 2014, Lunar_lander?
[18:48] <Lunar_Lander> ah we didn't think much about it yet and you?
[18:49] <mclane> winds need to become more reasonable before next launch
[18:49] <mclane> nothing planned before March timeframe
[18:49] <Lunar_Lander> yeah
[18:50] <Lunar_Lander> same here
[18:51] <mclane> actually, I would have to drive 200-300 km to recover the payload
[18:51] <mclane> http://predict.habhub.org/hourly/regensburg/
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[18:55] <Lunar_Lander> yea
[18:56] <Lunar_Lander> not a good Wx situation
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[19:05] <Oddstr13> what about a HAB designed not to burst? where would that end up?
[19:05] <Oddstr13> s/end up/pass over/
[19:06] <arko> http://www.youtube.com/watch?v=IH8gOu7PDLI
[19:06] <arko> wheeerrrree theee wind blooowwssss
[19:07] <Oddstr13> arko: ofc, i was kinda wondering where on the map that would be :P
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[19:08] <arko> make the descend velocity very close to zero
[19:08] <arko> like 1e-15 or something
[19:08] <arko> that way it goes at almost the float alt
[19:08] <arko> its a bit of a trick
[19:08] <arko> but works semi ok
[19:08] <steve_mobile> What do i have to do next to get boards made i have done the eagle schematic and wired the board
[19:09] <mattbrejza> http://hackaday.com/2009/01/15/how-to-prepare-your-eagle-designs-for-manufacture/ steve_mobile
[19:10] <mattbrejza> https://www.sparkfun.com/tutorials/115 might also be useful
[19:10] <Oddstr13> http://predict.habhub.org/#!/uuid=e1b9ba4c92b6a30130c05a35ea2babda90cb135c :P
[19:10] <steve_mobile> Cheers
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[19:12] <kd2eat> Speaking of "no burst trajectories" I was also wondering wiether there was something similar to predict.habhub.org for the pico balloons.
[19:14] <x-f> NOAA HYSPLIT - http://ready.arl.noaa.gov/hypub-bin/trajsrc.pl
[19:15] <arko> thats a way better way
[19:15] <mattbrejza> also setting the burst altitude as the float altitude, and the descent rate as 1e-8 kinda works with the cusf predictor
[19:15] <arko> Oddstr13: ^^
[19:20] <Oddstr13> i think i'm listening to french radio :P
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[19:28] <kd2eat> Oh, I like the idea with the burst altitude / slow descent.
[19:29] <Oddstr13> wouldn't something like that be needed for the polar challenge thingy?
[19:29] <Oddstr13> lack of burst that is
[19:30] <jcoxon> Oddstr13, yes indeed
[19:31] <Oddstr13> i just hope i have the required hardware and software by that time, so that i hopefully can track a copule o HABs :P
[19:32] <Oddstr13> kinda quite a bit out of range from the launches i've seen on spacenear.us :P
[19:32] <Oddstr13> even at max altitude
[19:34] <LeoBodnar> It just came to me that time flow is inversely exponential
[19:35] <kd2eat> Can I have a little of what you're having?
[19:35] <Oddstr13> LeoBodnar: what? time slowing down? o.o
[19:35] <Lunar_Lander> wow relativistic effects!
[19:35] <Lunar_Lander> :P
[19:35] <LeoBodnar> I can see that working in both the Bing Bang timescale and my life
[19:36] <Oddstr13> i kinda feel like time is accelerating ._.
[19:36] <Oddstr13> days, weeks and months fly by
[19:36] <DL1SGP1> can time slow down while we sleep and during weekends and then go normal speed or faster again during work and so on?
[19:36] <LeoBodnar> no, it is you time frame reference slowing down
[19:37] <LeoBodnar> +r
[19:39] <Lunar_Lander> can we somehow jump to 2 pm tomorrow?
[19:39] <Lunar_Lander> so that I know what mark I got for the B.Sc. thesis
[19:39] <Lunar_Lander> xD
[19:39] <kd2eat> Personally, I'd like to go back to 1986.
[19:39] <LeoBodnar> yes, seru! please follow me
[19:39] <LeoBodnar> *sure lol
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[19:43] <nats`> kd2eat not me I was a foetus :p
[19:44] <kd2eat> Heh. I'm more like a fossilus.
[19:45] <nats`> you mean you're a ty-rex ? :D
[19:45] <kd2eat> I think my arms are a little long for that.
[19:55] <Lunar_Lander> xD
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[19:56] <Lunar_Lander> hi S_Mark
[19:58] <S_Mark> HI Lunar_Lander
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[20:07] <Sytex> hi
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[20:10] <mfa298> Hi Sytex
[20:12] <Sytex> I visited this channel early with name HA7018SWL, but now I installed a client and using my 15year old IRC nick :)
[20:12] <Sytex> *earlyer
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[20:13] <mfa298> always good when you get start using old nicks again :)
[20:14] <Sytex> I haven't used any client for 14-15 years
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[20:15] <Sytex> :)
[20:15] <Sytex> earlier I usd webclient to visit this channel
[20:17] <Sytex> And today I faced the fact that mirc is now at version 7 :)
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[20:19] Action: Oddstr13 dosn't really like mIRC
[20:19] <Oddstr13> weechat & irssi :3
[20:20] <mfa298> irssi and screen (or tmux)
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[20:20] <LeoBodnar> oh, I might look up my BBS login from 1980s
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[20:21] <Sytex> At home I have a win7 PC, at work I installed irssi :)
[20:22] <Laurenceb_> LeoBodnar: did you get anywhere iwht incoherent integration?
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[20:22] <LeoBodnar> Right, 15 years ago was only 1999 :/
[20:23] <LeoBodnar> I have tried generating LO with box car spectrum but it seems to wipe out the signal. I have only 32ms of data to integrate over
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[20:24] <Sytex> Yep, The year when dial-up internet became available at homes...in my country...at affordable price
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[20:25] <S_Mark> When I read the serial from the GPS on the pi - every other line, the NMEA starts =??=$GPGGA (I have turned off all other strings) - any ideas?
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[20:27] <S_Mark> the other lines just start $GPGGA
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[20:28] <mfa298> Sytex: a lot of people use a cheap vps and run irssi with something like screen or tmux on that.
[20:28] <mfa298> then access via ssh (putty on windows) from wherever you are.
[20:28] <mfa298> mosh is also a good addition to ssh if you're on a dodgy (3G) connection.
[20:29] <ibanezmatt13> S_Mark: I remember having problems like that. Mine was the way I was reading the serial port. This worked for me in case it helps: https://github.com/ibanezmatt13/NORB/blob/master/NORB.py#L170
[20:29] <Laurenceb_> LeoBodnar: yeah you will need more than that
[20:30] <S_Mark> ah cheers ibanezmatt13 - will take a look now
[20:30] <ibanezmatt13> np
[20:30] <LeoBodnar> I have mixed up few dozens of carriers with 100Hz spacing
[20:30] <S_Mark> what you up to these days anyway ibanezmatt13
[20:30] <Sytex> Formerly I didn't know linux, so now I am looking for better solutions than mirc. I have a 2 linux based servers.. srceen and some linux clinet will be used later... but now yet I'm re-learnig IRC stuff :)
[20:30] <S_Mark> you seem to have loads on the go usually lol
[20:31] <ibanezmatt13> preparing for our next launch in a few weeks S_Mark. And making a rocket trajectory predictor, rocket launch controller, looking at designing a big rocket this year too. :) No change there, all busy busy
[20:31] <chrisstubbs> ibanezmatt13, http://gizmodo.com/someone-turned-a-quadcopter-into-a-flying-missile-launc-1510571186
[20:31] <chrisstubbs> you might like that ;)
[20:31] <Sytex> mfa298: I didn't know mosh, will look after it
[20:32] <S_Mark> ha sounds good. hope the weather is good, I wanna launch in a month or so
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[20:32] <Laurenceb_> LeoBodnar: im not sure if that will work
[20:32] <ibanezmatt13> WOW chrisstubbs that's awesome, might try something like that myself :P
[20:32] <Laurenceb_> or it will will get too spikey
[20:32] <LeoBodnar> do you thing it should be random?
[20:32] <ibanezmatt13> Yeah S_Mark, predictions are really naf. Hopefully it'll change in the next few weeks though
[20:32] <Laurenceb_> i was wondering if you want maybe random or FM
[20:33] <Laurenceb_> you could test this in matlab/octave
[20:33] <Laurenceb_> i might try...
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[20:33] <mfa298> Sytex: I mostly just use plain ssh, but on connections that keep dropping out (like 3G connections) mosh can be useful (it sets up over ssh but then runs on a high udp port)
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[20:34] <Laurenceb_> i had 4 hours sleep last night :-/
[20:34] <Laurenceb_> too much work on atm
[20:34] <Sytex> mfa298: sounds good.
[20:35] <LeoBodnar> you need some opto-acoustical stimulation
[20:37] <Laurenceb_> iirc the Borre data set is longer
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[20:42] <S_Mark> that worked ibanezmatt13_ cheers
[20:44] <LeoBodnar> it's quite large - almost an hour i think
[20:44] <ibanezmatt13_> awesome S_Mark, no probs
[20:51] <nosebleedkt> bye all :D
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[21:01] <Lunar_Lander> hi Chetic
[21:01] <Lunar_Lander> oh christubbs left
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[21:03] <Laurenceb_> is lithium polymer now the highest power density of any battery type?
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[21:03] <LeoBodnar> Zinc Air is
[21:04] <Laurenceb_> power, not energy
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[21:05] <LeoBodnar> quite possibly yes
[21:05] <LeoBodnar> sorry, didn't pay attention
[21:05] <Laurenceb_> i see ~10W/gram for sale
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[21:08] <adwiens> LeoBodnar: did you figure out why zinc air didnt work in your high altitude test?
[21:08] <adwiens> i saw that on your website
[21:08] <Laurenceb_> adweins: looked like combination of cold + low air pressure
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[21:10] <LeoBodnar> lack of air and freezing temperatures
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[21:11] <LeoBodnar> it's water-based electrolyte
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[21:12] <LeoBodnar> somebody should make organic based Zinc Air cells
[21:12] <LeoBodnar> military probably use them already
[21:12] <Laurenceb_> wtf
[21:12] <Laurenceb_> there are 100C lipo cells now
[21:12] <Laurenceb_> madness
[21:13] <LeoBodnar> Boeing special
[21:13] <Laurenceb_> haha
[21:14] <Laurenceb_> http://www.hobbyking.com/hobbyking/store/__26738__turnigy_nano_tech_300mah_1s_45_90c_lipo_pack_fits_nine_eagles_solo_pro_100_.html
[21:14] <LeoBodnar> 100C means full discharge time 36 seconds
[21:14] <Laurenceb_> ~13W/gram from that beasty
[21:14] <Laurenceb_> lolz
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[21:16] <jededu> The specific power observed for the modified LiFePO4 (170kWkg at a 400C
[21:17] <jededu> http://www.gizmag.com/lithium-ion-battery-breakthrough-mit/11244/
[21:17] <qyx_> 2.77$ this lipo?
[21:18] <Sytex> 300mAh not much...
[21:18] <adwiens> That article is from 2009...
[21:21] Nick change: Sytex -> kutya
[21:22] Nick change: kutya -> Sytex
[21:25] <qyx_> LeoBodnar: you did that se4110 usb sampler if i remember correctly
[21:25] <qyx_> how did you connect se4110 to mcu, spi?
[21:25] <LeoBodnar> yea
[21:26] <qyx_> meh, 19.5MHz is a bit out of spec of most of stm32's
[21:26] <qyx_> except F4
[21:26] <LeoBodnar> out of spec usually means "still works"
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[21:27] <Oddstr13> mfa298: well, mosh didn't handle the weechat-screen-xfce4term combo so well, screen drawing was messed up somehow... but it's great for roaming between networks!
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[21:28] <jededu> Found it http://www.saibnpower.com/product.asp
[21:28] <qyx_> LeoBodnar: yep, i am going to try that
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[21:30] <ibanezmatt13> http://www.youtube.com/watch?v=DKtVpvzUF1Y
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[21:35] <ada_work> hi there. First time building a tracker. Need some documentation on getting the gps(adafruit) and the ntx2 to work together.Any help
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[21:37] <Geoff-G8DHE> Have you looked at the guides on the Wiki ?
[21:37] <daveake> read position; format string; send string
[21:37] <daveake> ------------ ^^^^
[21:37] <daveake> that bit
[21:38] <Oddstr13> this might be of interest; http://www.indiegogo.com/projects/navspark-arduino-compatible-with-gps-gnss-receiver
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[21:40] <Geoff-G8DHE> http://ukhas.org.uk/guides:linkingarduinotontx2?s[]=ntx2#linking_an_arduino_to_a_radiometrix_ntx2_transmitter
[21:41] <Upu> there is a new version of that on my blog
[21:41] <Upu> http://ava.upuaut.net/?p=617
[21:42] <Upu> feel free to transfer it to the wiki anyone :)
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[21:43] <ada_work> hey that seems helpful
[21:43] <ada_work> thanks
[21:43] Nick change: Sytex_ -> Sytex
[21:45] <ada_work> but do you have any tutorial on working the ntx2 with a gps
[21:45] <daveake> they are 2 separate things. Get the GPS code working. Get the NTX2 code working. Then it's a small amount of glue to stick them together.
[21:45] <mfa298> ada_work: best thing to do is get both bits working on their own first, then it's not much work to get them working together
[21:45] <daveake> snap :)
[21:46] <mfa298> it's like we've answered these questions before.
[21:46] <daveake> we did
[21:46] <daveake> 24 hours ago I think was the last one
[21:47] <ada_work> Yeah i mean i have them working separately fine,,,,but i am just stuck as to how to proceed now. I am using an arduino uno and the gps library also enables me to parse the data so that I don't have to use the raw GPRMC data
[21:48] <daveake> The "bit in between" is almost trivial
[21:48] <mfa298> in fairly simple terms print the variables you want from gps & sensors, work out the checksum and send that to the ntx2
[21:49] <ada_work> checksum?
[21:49] <Oddstr13> to verify that the data is received correctly
[21:49] <mfa298> it's described on the linking ntx2 to arduino page you were linked to above
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[21:50] Nick change: Bartex -> Sytex_
[21:51] <Oddstr13> NTX2B is the transmitter you guys use the most?
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[21:52] <daveake> The B is quite new and hasn't been flown much yet
[21:52] <mfa298> not sure if it's used the most now (Leo has skewed those numbers) but it is the easiest to use and works well
[21:52] <Oddstr13> assuming the one without the b is being phased out :P
[21:54] <ada_work> sorry guys that's what I am stuck at. How do you send the data achieved from the gps to the ntx2?
[21:54] <Oddstr13> ada_work: store in char array what you want to send, then send it?
[21:54] <ada_work> Do you guys have any documenation. First time and I am really bad with electronics
[21:55] <Oddstr13> this has more to do with programming than electronics tho
[21:56] <mfa298> ada_work: *read* the links that were given ahove
[21:56] <ibanezmatt13> I think there's sufficient info for sending data to NTX2 in the tutorial on the Wiki, as Upu linked to above
[21:56] <mfa298> in particular http://ukhas.org.uk/guides:linkingarduinotontx2
[21:56] <daveake> http://ukhas.org.uk/guides:linkingarduinotontx2
[21:56] <mfa298> and http://ava.upuaut.net/?p=617
[21:56] <daveake> Sample code and everything
[21:56] <LeoBodnar> interesting find Oddstr13
[21:57] <Oddstr13> don't remember where i found it, as it's like a week ago :P
[21:57] <Oddstr13> suddenly remembered it when you guys started to talk about gps ^^
[21:59] <jededu> Has anybody done a wiki on ntx2 gps and the RasPi
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[21:59] <DL1SGP1> GPS is cool, has anyone mentioned that today?
[21:59] <arko> gps is cool
[21:59] <DL1SGP1> :) thanks arko
[21:59] <arko> :)
[21:59] <mfa298> jededu: there are a couple of pages about pi stuff on the ukhas wiki
[22:00] <arko> have you seen ed's seminar on it DL1SGP1?
[22:00] <mfa298> althoguh it might take a bit of reading
[22:00] <arko> its really good
[22:00] <jededu> Ill have a look
[22:01] <LeoBodnar> GPS summary in one sentence: "the devil is in the details"
[22:01] <DL1SGP1> not yet arko, I need to fetch up with somethings in a while that I have more peaceful moments, aka family gone on holidays without me :)
[22:02] <jededu> not stuck yet just checking ;)
[22:02] <arko> ahh
[22:03] <DL1SGP1> arko, how is the fundraising coming along, any news on how things will need to be organized concerning the move?
[22:03] <arko> its going well
[22:03] <arko> as expected its slowed a bit
[22:04] <jededu> arko where can i find that
[22:04] <arko> but will likely pick up
[22:04] <DL1SGP1> yeah the first rush
[22:04] <jcoxon> ping eroomde
[22:04] <arko> http://www.indiegogo.com/projects/save-nullspace-labs
[22:04] <arko> here
[22:04] <DL1SGP1> I gonna donate during the weekend cannot share much but every $ helps :)
[22:04] <arko> we are about half way through
[22:04] <Oddstr13> "the GPS / Beidou / GLONASS navigation kernel library integrated will remain in library file format" aww
[22:04] <arko> DL1SGP1: very much appriciated
[22:04] <arko> thank you!
[22:05] <eroomde> jcoxon: pong briefly
[22:05] <DL1SGP1> you do great things, such has to be supported
[22:06] <arko> :) thanks man
[22:06] <eroomde> does anyone recognise this image? http://www.europeanastrotech.com/educational-services/
[22:07] <arko> https://www.google.com/search?client=firefox-a&hs=naz&sa=X&rls=org.mozilla:en-US:official&q=weather+balloon&tbm=isch&tbs=simg:CAQSWxpZCxCo1NgEGgIIAQwLELCMpwgaMgowCAESCqoHsQetB6QEnQQaIMeIUlSpla-Z5WR7lp9Yo8mJdpxLF8vxW2YRqfuN_1qR0DAsQjq7-CBoKCggIARIETp5ZpAw&ei=fHvpUvTON8PsoATLuoLYDw&ved=0CCQQ2A4oAQ&biw=1920&bih=987
[22:07] <Oddstr13> oh god, google search wall of text ._.
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[22:07] <arko> http://www.redmondgarlicjims.com/balloon/
[22:07] <arko> tracks back to this?
[22:07] <arko> sorry about the link
[22:07] <arko> totally blanked on that
[22:07] <jcoxon> from these guys http://www.redmondgarlicjims.com/balloon/
[22:08] <Oddstr13> arko: dw, it's just that i can't copy the thing in one go xD
[22:08] <arko> hah
[22:08] <nats`> arko what payment method are accepted by indigogo ?
[22:08] <arko> paypal
[22:08] <arko> i think
[22:08] <nats`> ok
[22:10] <nats`> does it automaticcaly take the name of the paypal account ?
[22:10] <arko> i thinkso
[22:10] <arko> or indiegogo name
[22:10] <arko> i dont recall
[22:11] <nats`> oky let me find the option to remove that :p
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[22:12] <arko> heh
[22:12] <Oddstr13> "Don't display my name on the campaign page."
[22:12] <Oddstr13> that one?
[22:12] <arko> there ya go
[22:12] <arko> anon
[22:12] <Oddstr13> what are you buying? :P
[22:13] <Sytex> goodnight all ;)
[22:13] <Oddstr13> night Sytex
[22:13] Nick change: Sytex -> Sytex_AWAY
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[22:14] <nats`> Oddstr13 we can remove that after ?
[22:14] <arko> Oddstr13: we are having an emergency "move"
[22:14] <arko> our landlord is rennovating the building
[22:15] <Oddstr13> nats`: https://www.indiegogo.com/projects/navspark-arduino-compatible-with-gps-gnss-receiver/contributions/new?perk_amt=22&perk_id=1667963
[22:15] <Oddstr13> right below the $
[22:16] <nats`> yep but after because I already did :|
[22:16] <Oddstr13> arko: moving what? :P
[22:16] <arko> our hackerspace
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[22:17] <Oddstr13> nats`: i have no idea, i have never actually bought anything from indiegogo yet
[22:17] <Oddstr13> arko: cool
[22:17] <Oddstr13> i wish there was a hackerspace near me :P
[22:17] <arko> nats`: :) super cool man
[22:17] <DL1SGP1> create one :)
[22:17] <Oddstr13> arko: got a website for it?
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[22:17] <arko> http://032.la/
[22:18] <arko> our flickr has better stuff
[22:18] <Lunar_Lander> Oddstr13, where are you from?
[22:18] <Oddstr13> Lunar_Lander: Norway
[22:18] <Lunar_Lander> awesome! :)
[22:18] <arko> http://www.flickr.com/photos/nullspacelabs/
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[22:19] <Oddstr13> DL1SGP1: i have no idea how to, and i don't really know people in this area that would join
[22:21] <DL1SGP1> heh true, I guess one approach would be to create meetings of likeminded people in a public place before the decision is made to use some more specific location
[22:21] Action: Oddstr13 isn't so good at connecting with people afk :/
[22:22] <Lunar_Lander> oh
[22:22] <DL1SGP1> heh you made it to IRC, that is a certain step already
[22:22] <Oddstr13> DL1SGP1: well, IRC isn't afk xD
[22:23] <Lunar_Lander> xD
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[22:23] <DL1SGP1> get a wireless keyboard
[22:23] <Oddstr13> been on IRC for years
[22:23] <DL1SGP1> you can take it with you when talking to people
[22:23] <Oddstr13> haha DL1SGP1
[22:23] <Oddstr13> that'd just make it even more awkward :P
[22:24] <DL1SGP1> or create some starter project, PS2 keyboard connected to arduino doing speech synthesis based on your input
[22:24] <DL1SGP1> then you would not ahve to talk
[22:25] <Oddstr13> DL1SGP1: i'm sure a hackerspace would have helped me with my people skills :P
[22:27] <Oddstr13> arko: oh, look, you guys use EFnet
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[22:27] <arko> yep
[22:28] <Oddstr13> efnet was my introduction to IRC ^^
[22:29] <arko> haha
[22:29] <arko> its the wild west of ir
[22:29] <arko> irc
[22:29] <Oddstr13> yep
[22:30] <Oddstr13> no nickserv! :P
[22:30] <arko> exactly, we have op wars
[22:30] <arko> those are great
[22:30] <Oddstr13> you better not pick a popular nick, and/or have a bad connection :P
[22:30] <arko> keeps things interesting
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[22:30] <jededu> We are running a project in a primary school they have some questions about insurance the company they use are not to keen has anybody had any experience with this
[22:31] <arko> its also a bit of a more rude crowd
[22:31] <eroomde> yes
[22:31] <eroomde> it's very difficult
[22:31] <Oddstr13> > bot joins, gets op by mistake, and kills all other ops
[22:31] <arko> but once you realize its all not serious its ok
[22:31] <Oddstr13> :3
[22:31] <arko> haha
[22:31] <arko> true
[22:31] <eroomde> if the school isurers say no, it's seriously uphill, as you already have a relationship with them, which is half the battle
[22:31] <eroomde> otherwise you're talking premiums of the order of £3k+
[22:31] <jededu> wow
[22:32] <eroomde> some people doing tv stuff have got it as special effects insurance
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[22:32] <jededu> did you get around it
[22:32] <eroomde> more like £200
[22:32] <eroomde> but they won't be swayed if it's not for tv or film
[22:32] <Oddstr13> arko: the "not serious" bit usually takes a while to get :P
[22:32] <eroomde> jededu: we get around it by not being insured
[22:32] <arko> Oddstr13: yep
[22:32] <eroomde> we just reason the risk is very low
[22:33] <eroomde> i have payed that £3k though to insure 3 flights before
[22:33] <eroomde> for something important and much more complicated than the average hab
[22:34] <jededu> I could just launch off site i suppose
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[22:37] <jededu> They havent said no there just a bit jittery I need to put together a risk assessment
[22:37] <eroomde> oh, that should be more ok
[22:37] <eroomde> can emphasise the number of flights there have been with ukhas, the caa clearance, the predictor
[22:38] <eroomde> maybe show other schools have done it
[22:38] <eroomde> feel free to use any of our stuff
[22:38] <eroomde> eg http://news.bbc.co.uk/1/hi/sci/tech/7767376.stm
[22:39] <eroomde> to show there's a precedent for school experiments
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[22:39] <jededu> its funny because they let us demo a model jet in the playground (static) odd
[22:39] <eroomde> that wont land on a stranger's head 50 miles away
[22:40] <jededu> true
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[22:41] <eroomde> (nor will your balloon of course, just that's the risk the underwriters worry about)
[22:41] Nick change: kuldeepdhaka_ -> kuldeepdhaka
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[22:43] <jededu> you are right there is plenty of reference material and the ukhas data should do it thanks
[22:44] <eroomde> we can def help if you want stats
[22:44] <eroomde> and general ammo for your cause
[22:46] <jededu> thanks i would be grateful for any stats you have
[22:48] <DL1SGP1> also it needs to be pointed out how few "close encounters" with HABs (be community or radiosondes for meteo) have been reported by airmen, I think there is a site where you can search such reports online to get an idea how small the amount of "sightings" that resulted in a report was in comparison to the number of total flights we see each day
[22:49] <jededu> ill check it out im sure ive seen that somewhere
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[23:02] <jededu> Ive had a quick look 0 so far http://www.caa.co.uk/application.aspx?catid=14&pagetype=65&appid=7&newstype=a
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[23:09] <jededu> good diy antenna wiki ?
[23:17] <Oddstr13> ^2nd that
[23:17] <mfa298> there's a payload antenna design on the wiki
[23:17] <Oddstr13> what about receiver antenna?
[23:18] <jededu> and that
[23:18] <jededu> bun not diy
[23:18] <jededu> but
[23:20] <jededu> http://www.ebay.co.uk/bhp/2m-base-antenna
[23:22] <mfa298> you want a 70cm antenna to go with the ntx2b
[23:22] <mfa298> 2m => 144-146MHz
[23:22] <mfa298> 70cm => 430-440 MHz
[23:22] <mfa298> (at least for UK / Europe)
[23:22] <jededu> yes and a base station antenna any recommendations
[23:23] <mfa298> things like the X-50 / W-50 seem to be popular
[23:23] <SpeedEvil> oooh
[23:23] <jededu> tyhatone is dual band ill check out yours
[23:23] <SpeedEvil> arent there publically accessible radar and tracking data at least in the us
[23:24] <SpeedEvil> simulations could use this i guess
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[23:25] <mfa298> jededu: if you want to spend more you can also look at a yagi + Rotator - But that can get expensive for good stuff.
[23:25] Nick change: heathkid|2 -> heathkid
[23:26] <mfa298> if you're chasing you'll probably also want a magmount antenna to go on the vehicle
[23:26] <mfa298> and possibly a smaller handheld yagi
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[23:30] <jededu> yes I was planning on a small yagi and a mag
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[23:31] <jededu> how good are dongles rtl-sdr
[23:32] <mfa298> if it's all you've got it's worth getting the habamp to go with it (which ideally you want positioned as close to the antenna as possible)
[23:32] <gonzo_nb> if you can get in range of your landed payload, you can get an exact gps location. And go straight to it. But a yagi is a idea as good backup.
[23:33] <gonzo_nb> I've found a few that way, but always pack the yagi in the car just in case
[23:33] <mfa298> if you can afford it the funcube pro plus dongle is a much better reciever (or one of the ham radios listed on the wiki - ft817 is popular)
[23:35] <gonzo_nb> the funcube dungle pro plus is good enough to not need the habamp
[23:35] <jededu> ft817 looks ok
[23:36] <gonzo_nb> it has a decent sensitivity and has the required filters built in
[23:37] <mfa298> I've not noticed much difference between the ft817 and funcube pro plus. There's a distinct difference between them and the rtl-sdr.
[23:37] <jededu> so does the funcube so many options
[23:38] <jededu> ok rtl-sdr is out
[23:39] <Lunar_Lander> good night!
[23:40] <mfa298> funcube is cheaper to buy, but needs a laptop to recieve anything. It's also recieve only (but that doesn't matter for hab and maybe a good thing if no one is licensed)
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[23:41] <jededu> I have the luxury of access to lots of good IT equipment
[23:41] <jededu> and no no body in licenced
[23:44] <jededu> Si i think the funcube is a good option what SDR softwrae or are they all much the same
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[23:45] <mfa298> the funcube dongle is also easy to use with the funcube software to recieve the funcube satellite (whilst its still in orbit) - you can also use a normal amateur radio but there might be a bit more to setup
[23:46] <mfa298> it's mostly a case of play with the bits of software and see whats best
[23:46] <mfa298> mot people use sdrsharp or sdr-radio(v2)
[23:47] <jededu> thanks for the help decisions made easy
[23:47] <mfa298> sdrsharp is easier to use, sdr-radio has a few more features (e.g possible to listen to two payloads at the same time if their frequencies are close enough
[23:47] <SpeedEvil> how is sdr software for fcd under linux?
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[23:48] <mfa298> SpeedEvil: gnu radio+gqrx mostly i think (and then lots of swearing at pulse audio)
[23:48] <jededu> I will be using a backup transmitter so probably sdr-radio
[23:50] <SpeedEvil> ah
[23:50] <SpeedEvil> mfa298: no change there then. I'm constantly swearing at it.
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[23:51] <mfa298> with the funcube you'll need all the transmitters within a 192khz band (bandwidth of the funcube) the rtl-sdr has 2mhz bandwidth (that and cost are it's positive features)
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[23:54] <jededu> just reading about it now ;)
[23:55] <nats`> good night channel :)
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[23:59] <gonzo__> you don't need to monitor both transmitters at the same time. Just check that they bothe work before launch, and once they are in the air, the other statiosn on the groung will do the rest. (assuming you are in a part of the world with plenty of listeners)
[00:00] --- Thu Jan 30 2014