highaltitude.log.20141130

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[00:30] <Maxell> fsphil: I have a hilight on "New position from B-64 after" and got confused about SpacenearUS's message "No new position" :P
[00:33] <SpeedEvil> hah
[00:38] <lz1dev> the prankster bot got you
[00:47] <Laurenceb_> looks like the battery had a B-63 type failure
[00:48] <Laurenceb_> there no sign of icing, gas loss or envelope damage on B63/4 or 6
[00:48] <arko> northern latitudes, less sun
[00:48] <arko> yeah
[00:48] <Laurenceb_> i think its battery failure on all of them
[00:48] <Laurenceb_> well 63 failed as it went into polar night
[00:48] <Laurenceb_> the battery fell off really badly
[00:49] <Laurenceb_> also ive plotted the discharge curves and there was a knee appearing over the first 30% of discharge and getting worse with time
[00:49] <lz1dev> would be nice if the tracker can run on solar only
[00:49] <Laurenceb_> aiui thats a symptom of lithium dendrites
[00:49] <Laurenceb_> yeah
[00:50] <Laurenceb_> with a supercap to even out the gps power itd work during the daytime
[00:50] <Laurenceb_> in fact supercaps are almost good enough to power it all night
[00:53] <lz1dev> plus you will know how much power you have based on just the voltage
[00:53] Action: SpeedEvil ponders magnetic declination
[00:55] <Laurenceb_> sirf kind of solves gps issues
[00:55] <Laurenceb_> you can tell it your power budget
[00:56] <SpeedEvil> Well.
[00:56] <Laurenceb_> if you can find the documentation for the binary mode...
[00:56] <SpeedEvil> I guess the most relevant thing to test first is - does the battery actually care about slow discharge at -40C
[00:56] <Laurenceb_> it TCXO is off most of the time, then total power draw could be as low as ~2mW
[00:56] <Laurenceb_> yeah
[00:56] <SpeedEvil> Or is it the morning charging that cold that's killing it
[00:56] <lz1dev> i think the problem is charging at -40C
[00:57] <SpeedEvil> yeah
[00:57] <Laurenceb_> from the nasa test docs i can find, its a cumulative effect of low temperature charging
[00:57] <SpeedEvil> Err - -50C
[00:57] <Laurenceb_> i was actually wondering if you could burn off the dendrites
[00:57] <SpeedEvil> When it's in the light - it gets up to ~0 in an hour or so?
[00:57] <Laurenceb_> or if that doesnt help, as you still eat up the lithium supply
[00:58] <lz1dev> SpeedEvil: its not good enough
[00:58] <Laurenceb_> well it wasnt on a few days close to when it died
[00:58] <Laurenceb_> due to high latitude
[00:58] <Laurenceb_> i think thats what finished it off
[00:58] <SpeedEvil> what's not good enough
[00:58] <lz1dev> 0C
[00:58] <Laurenceb_> maybe -20C with the improved electrolyte Leo wa susing
[00:59] <Laurenceb_> seemed to lower the operating temperature by 20C
[01:00] <Laurenceb_> ive been wondering about far infrared power
[01:00] <SpeedEvil> yeah - there are quite a few that go that low
[01:00] <SpeedEvil> ~7C is specified for many cellphone batteries
[01:00] <Laurenceb_> theres ~300W/m^2 of radiation to harvest
[01:00] <SpeedEvil> but ...
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[01:04] <Laurenceb_> 134 cycles is pretty good for extreme conditions
[01:06] <Laurenceb_> the good thing about longwave ir is its there all night too
[01:07] <Laurenceb_> just none over central greenland in winter, north east siberia in jan/feb and north of 80N in winter
[01:08] <Laurenceb_> still, thats probably more coverage than solar
[01:10] Action: Laurenceb_ had a very silly idea
[01:10] <Laurenceb_> thermal modelling in spice using custom "components"
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[01:34] <Oddstr13> hahaha, holy crap PiFM is blasting the airways
[01:37] <ike> Laurenceb_ can't you just buy some plutonium?
[01:37] <ike> at -40*C/-40*F you will get quite a lot of power
[01:38] <ike> http://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator
[01:42] <Laurenceb_> yeah ill give my supplier a ring
[01:44] <Laurenceb_> http://www.lockheedmartin.co.uk/us/products/compact-fusion.html
[01:44] <Laurenceb_> lol products
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[02:35] <Oddstr13> http://satomi.openshell.no/tmp/freq_pi.png http://blog.riyas.org/2014/01/raspberry-pi-as-simple-low-cost-rf-signal-generator-sweeper.html
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[07:01] <Bob_Saget> Hey Upu, you asked for feedback for the 2m preamp
[07:01] <Bob_Saget> it doesn't appear to work well
[07:01] <Bob_Saget> my baofeng seems to do a better job
[07:02] <Darkside> the preamp will do what its meant to do, which is amplify whatever it gets in the input port
[07:03] <Darkside> whether that helps in a particular situation is another thing altogether
[07:03] <Bob_Saget> umm yeah ok
[07:04] <Darkside> as in, if there is noise, it will amplify that quite happily
[07:04] <Darkside> and there will be no change in your SNR
[07:05] <Bob_Saget> you mean noise from the computer?
[07:05] <Darkside> or anywhere
[07:05] <Darkside> the amplifier won't discriminate..
[07:05] <Darkside> it'll just amplify whatever it gets at its input port
[07:08] <Bob_Saget> ok well then i suppose the baofeng does a better job at rejecting noise then
[07:09] <Darkside> what other receiver are you using?
[07:09] <Darkside> a rtlsdr?
[07:10] <Bob_Saget> yes i have a few of them, but the one I put it on was the E4000 SDR
[07:10] <Darkside> yeah
[07:10] <Darkside> well the fact that its hooked up to a USB port isnt going to help
[07:10] <Oddstr13> hehe :3
[07:11] <Bob_Saget> maybe i should try a usb extension cable?
[07:11] <Darkside> doubt it'll help
[07:11] <Oddstr13> mine is noisy as heck, even with a 5m extension :P
[07:11] <Bob_Saget> maybe i should just thow it in the trash?
[07:11] <Darkside> you may want to have a play around withthe gain settings too
[07:11] <Darkside> as having the gain on Auto doesn't always help
[07:11] <Oddstr13> nah, don't thrash it, it's great at some stuff
[07:11] <Bob_Saget> i have it at 42, but i might play with it
[07:11] <Darkside> yeah
[07:11] <Darkside> sometimes twiddling that can give better results
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[07:12] <Oddstr13> I usually don't go above 38
[07:12] <Oddstr13> but then, these arn't precise things, and would probably vary from unnit to unit
[07:12] <Darkside> yeah
[07:12] <Darkside> the E4000 tuners seem to have a lot more spurs too
[07:13] <Oddstr13> I've in fact managed to receive JT65 down in the 10m band, from over 4000km away
[07:13] <Darkside> even though everyone seems to say they're good
[07:13] <Darkside> Oddstr13: thats because its JT65
[07:13] <Darkside> and its A) slow and B) has a shitload of error correction
[07:13] <Oddstr13> indeed
[07:14] <Darkside> not very useful as a text chat mode
[07:14] <Darkside> more as a 'hey i'm here' mode
[07:14] <Oddstr13> it also includes grid location, and the software tells me the distance :P
[07:14] <Darkside> if you see someone on JT65 with a SNR of >-10, get the fuck off JT65 and go use a real mode
[07:14] <Oddstr13> I see a lot of RTTY, BPSK and CW down there too
[07:14] <Darkside> and have a real chat with them
[07:14] <Darkside> oh you wont be able to go below 10m will you
[07:14] <Oddstr13> nah
[07:15] <Darkside> lots of fun happens at 20m
[07:15] <Oddstr13> limited to about 24MHz
[07:15] <Darkside> but the R820T's wont go there unless you mod the dongle for direct sampling
[07:15] <Oddstr13> I have just this one, so I don't wana mess with it :P
[07:16] <Oddstr13> also, the sad thing about 10m and 12m, is that it's only there at daytime
[07:16] <Darkside> this is normal
[07:16] <Oddstr13> Yep, but sad non the less :P
[07:16] <Darkside> get a better receiver?
[07:16] <Oddstr13> I should :P
[07:17] <Oddstr13> But, I'm relativly new to the field, and don't really know what to go for
[07:17] <Darkside> or get an upconverter
[07:17] <Darkside> they work fairly well
[07:17] <Darkside> not brilliantly, but well enough that you can have a look at the lower bands
[07:17] <Oddstr13> yea, considering the HackRF + the HamItUp
[07:17] <Darkside> well
[07:17] <Darkside> hackrf isnt necessarily a better receiver
[07:18] <Darkside> being able to cover more bandwidth isn't really a plus, not when you have the same amount of dynamic range
[07:18] <Oddstr13> it can go higher in frequency, up to all the fun stuff in 2.4MHz :P
[07:18] <Darkside> but... it can transmit too
[07:18] <Darkside> yes
[07:18] <Darkside> i own one
[07:18] <Darkside> im hoping to use it as a high-IF for microwave stuff
[07:18] <Oddstr13> and, yea, I'd love to mess with transmitting in the ISM bands
[07:19] <Oddstr13> I did in fact have a look at PiFM and related stuff
[07:19] <Oddstr13> man was that thing noisy :P
[07:19] <Darkside> lots of filtering reqwuired
[07:19] <Oddstr13> probably better just to buy dedicated hardware for the task i'd say
[07:20] <Darkside> especially if you want to abide by regulations
[07:20] <Oddstr13> haha, yea
[07:21] <Oddstr13> no idea of how stong the signal was, but it was probably quite a bit more than 10mW
[07:21] <Oddstr13> I made a screenshot of the waterfall, gimme a sec and i'll find it
[07:22] <Oddstr13> http://satomi.openshell.no/tmp/freq_pi.png
[07:23] <Oddstr13> 30-ish cm wire attached to it, with the RTL-SDR about 4m away
[07:24] <Bob_Saget> I'm pretty happy with my B200
[07:24] <Bob_Saget> OpenBTS is fun to play with
[07:25] <Oddstr13> I mean, with a bandpass filter this thing could probably work great for a tracker or some such
[07:26] <Oddstr13> kinda sad that it isn't mentioned more that the noise this thing emits is absolutly horrible
[07:28] <Oddstr13> Darkside: any recommendations when it comes to radio hardware?
[07:28] <Darkside> uh
[07:28] <Darkside> depends how much money you want to spend?
[07:28] <Darkside> :P
[07:28] <Oddstr13> well, I'm not planning on spending several thousand USD
[07:28] <Darkside> heh
[07:29] <Darkside> so no USRP B310 for you
[07:29] <Oddstr13> dosn't mean i won't /look/ at stuff that costs that much :P
[07:30] <Oddstr13> You know what I think would be a fun project? a satellite tracker ground station
[07:31] <Oddstr13> ever since I first discovered APT, I've wanted to try to receive from the NOAA satellites myself
[07:32] <Oddstr13> I guess I should just man-upp and get a hold on the supplies I would need to build an antenna
[07:33] <Oddstr13> my random-wire antennas arn't exactly... ideal
[07:34] <Darkside> general rule: spend as much on antennas as you do on the radio
[07:34] <Darkside> this applies more at HF than the higher bands
[07:34] <Oddstr13> hm.. still have a few bucks to spend then :P
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[07:36] <Oddstr13> USRP E310 = 20500 NOK.... a bit outside what I want to pay for my next receiver, yea :P
[07:37] <Oddstr13> Darkside: Also, I'd love to learn how to make my own antennas
[07:37] <Oddstr13> like, a QFH for NOAA reception
[07:38] <Darkside> sure
[07:38] <Darkside> go nuts
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[07:41] <Oddstr13> in the mean time, got any receivers you would recommend? remember we're talking about an upgrade from the RTL-SDR here, so shouldn't be that hard to beat
[07:42] <Darkside> well
[07:42] <Darkside> the airspy looks good
[07:42] <Oddstr13> that's the SDR# one, right?
[07:43] <Oddstr13> yep
[07:43] <Darkside> uh
[07:43] <Darkside> dunno about that
[07:43] <Darkside> the interface is actually open source, unlike SDR#
[07:44] <Oddstr13> well, it's plastered all over their homepage, so :P
[07:44] <Darkside> mm ok
[07:44] <Oddstr13> "You liked the software? We designed the matching hardware!"
[07:45] <Oddstr13> still, that won't go down into lower bands
[07:45] <Darkside> upconverter
[07:46] <Oddstr13> I guess
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[07:49] <Oddstr13> so, we have the RTL-SDR at about $8, the HackRF at about $300, the Airspy at $200 and the USRP E310 at $2700 :P
[07:49] <Darkside> bladeRF sits in the middle
[07:49] <Darkside> that bottoms out at 300MHz though, so you *really* need an upconverter
[07:49] <Darkside> but they do sell one
[07:50] <englishman> the ettus stuff seems nice
[07:50] <Darkside> yeah the B210 is tempting
[07:50] <Darkside> again, bottoms out at 300MHz
[07:50] <englishman> and they actually care about drivers
[07:50] <Oddstr13> englishman: and money :P
[07:50] <Darkside> mm im awaiting features for the hackrf..
[07:50] <Darkside> like, being able to switch between TX and RX easily
[07:50] <Darkside> also triggered capture
[07:51] <englishman> or any sort of windows support
[07:51] <Oddstr13> you can't switch easily between RX and TX? :/
[07:51] <Darkside> you can
[07:51] <Darkside> i mean, the hackrf isnt full duplex
[07:52] <Oddstr13> ah, well, that I can handle
[07:52] <Darkside> but i was kind of expecting a means of easily switching between TX and RX without having to restart the flowgraph
[07:52] <Oddstr13> ah, GRC stuff?
[07:52] <Darkside> yeah
[07:52] <Darkside> im sure you could do it easier with python
[07:53] <Oddstr13> well, that's software side, some of which is Python :3
[07:53] <Darkside> yeah
[07:53] <Darkside> exactly
[07:53] <Darkside> so im sure its possible
[07:53] <Oddstr13> I should really go look at the python behind GRC
[07:53] <Oddstr13> I'm sure I could more easily use that beast from that side :P
[07:54] <Oddstr13> I kinda gave up on it when I couldn't get audio output not to do overruns/underruns or whatever it was
[07:55] <Oddstr13> I've been told that I should uninstall Pulseaudio, and that that most likley is the cause..
[07:56] <Oddstr13> but everything else works with Pulseaudio, including gqrx, so i'm pretty sure it's software side somewhere in GRC
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[08:27] <SA6BSS> here is a couple of sting you can do for improving the rx on rtl-sdr : http://www.rtl-sdr.com/improving-hf-reception-disconnecting-switching-power-supply-rtl-sdr/
[08:27] <SA6BSS> http://www.rtl-sdr.com/simple-rtl-sdr-shielding-copper-tape/
[08:27] <SA6BSS> http://www.rtl-sdr.com/shielding-rtl-sdr/
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[08:28] <Maxell> SA6BSS: nice hack for the HF reception
[08:31] <Oddstr13> SA6BSS: first one describes much of the noise I'm seing on mine actually
[08:34] <SA6BSS> I will try going all in on one of my sticks, and ad all of those mods , put a sma connector on.
[08:34] <SA6BSS> I have done this mod as of know,
[08:34] <SA6BSS> http://webzoom.freewebs.com/g8jnj/Dongle%20mods.png
[08:35] <SA6BSS> I will also ad bias-t support as of this:
[08:36] <Oddstr13> planning to do the "shielding-rtl-sdr" one, as it dosn't really require me to modify the actual device as far as i can see
[08:38] <SA6BSS> http://www.rtl-sdr.com/new-inline-low-noise-amplifier-design-rtl-sdr-rtl-sdr-power-injector-modification/
[08:39] <SA6BSS> a lot of fun reading at http://g8jnj.webs.com/currentprojects.htm
[08:46] <Oddstr13> I need to grab a few more of that RTL-SDR, so that I dare modify them :P
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[09:00] <Oddstr13> Any recommendations on SDR software for Linux?
[09:01] <mclane_> gqrx
[09:02] <Oddstr13> sitting with it right now
[09:02] <Oddstr13> is there any way to zoom?
[09:02] <Darkside> hold mouse over frequency bar
[09:02] <Darkside> just below the 'spectrum' display
[09:02] <Darkside> and scroll wheel
[09:02] <mclane_> yea
[09:02] <Oddstr13> heh
[09:03] <Oddstr13> thanks
[09:03] <Oddstr13> so /THAT's/ the magic spot
[09:04] <Oddstr13> awesome, now it compares better to SDR# :P
[09:07] <Oddstr13> are there any controls for the waterfall besides FFT size and speed?
[09:09] <mclane_> not really
[09:11] <Oddstr13> Too bad, I found that relativly new control in SDR#, for selecting range quite usefull
[09:12] <Oddstr13> allows me to increase gain without saturating the waterfall with bright colors
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[09:15] <Oddstr13> well, found RTTY on 12m :P
[09:15] <Oddstr13> and there's JT65 ^^
[09:16] <Oddstr13> hard to make out much detail on the waterfall when most of it is yellow tho :P
[09:17] <Darkside> there shoul dbe a way to adjust the scale
[09:19] <Oddstr13> havn't been able to locate anything in the GUI so far
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[09:20] <Oddstr13> I did find the remote control interface rather simple to interface with however, just ascii commands over a tcp port
[09:21] <Darkside> oh thats nice, i didnt know about that
[09:22] <Darkside> i wonder if theres a hamlib plugin for it
[09:22] <Oddstr13> interfaces directly with gpredict
[09:22] <Darkside> so you can control the gqrx receive frequency from within dl-fldigi
[09:22] <Darkside> (amongst others)
[09:22] <Darkside> well thats nice
[09:23] <Oddstr13> lemme see...
[09:24] <Oddstr13> it's using the rigctld protocol
[09:24] <Oddstr13> http://gqrx.dk/doc/remote-control
[09:24] <Darkside> sweet
[09:25] <Darkside> that means fldigi will talk to it
[09:25] <Darkside> thats nice of them
[09:25] <Darkside> (and probably intentional)
[09:25] <Oddstr13> yea.. just need to find iyt what to set the settings to :P
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[09:52] <Maxell> http://aprs.fi/info/a/DC2EH-13
[09:52] <lz1dev> !aprs info DC2EH-13
[09:52] <SpacenearUS> 03lz1dev: 03DC2EH-13 is near 03Düsseldorf, Germany 10(51.531,6.85983) at 03594 meters - 12http://aprs.fi/info/DC2EH-13
[09:52] <SpacenearUS> 03lz1dev: Path: 03DC2EH-13>APT3A2 via 03WIDE1-1,WIDE2-1,qAR,DO5NE
[09:52] <SpacenearUS> 03lz1dev: Symbol: 03O/ Speed: 034kmph Course: 037°
[09:52] <SpacenearUS> 03lz1dev: Comment: 03www.ballon.org
[09:52] <Maxell> can someone chexk if itbis flying or not? i!m mobile
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[09:53] <Maxell> nice work lz1dev
[09:53] <Maxell> afk
[09:53] <lz1dev> it's another hotair balloon
[09:55] <pc1pcl_> Niederrheinischer Verein für Luftschifffahrt 1902 e.V....Hier wird Gasballon und Heissluftballon gefahren!
[09:55] <pc1pcl_> So indeed LAB not HAB :
[09:57] <mfa298> Oddstr13: other thing to consider is the funcube pro+ probably similar price to the airspy
[09:58] <Darkside> much less bandwidth, much better performance
[09:58] <Darkside> and decent filtering!
[10:00] Action: Oddstr13 tuned to 28 MHz
[10:00] <Oddstr13> holy cow that's a lot of cw
[10:00] <mfa298> and goes to <1mhz without mods (so good for hf)
[10:01] <Oddstr13> now that is an compelling argument
[10:01] <Darkside> Oddstr13: you should see 20m
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[10:01] <Darkside> 20m is jam packed with CW from 14000 to 14080 here
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[10:02] <Oddstr13> that would be about 10MHz, right?
[10:02] <Darkside> 14MHz
[10:02] Nick change: Herman -> Herman-PB0AHX
[10:02] <Oddstr13> ah
[10:02] <Herman-PB0AHX> GM alll
[10:02] <Oddstr13> let's see what this portable am receiver can pick up there then :P
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[10:07] <Oddstr13> http://satomi.openshell.no/tmp/Screenshot%20-%2011302014%20-%2011%3a03%3a50%20AM.png
[10:08] Action: Oddstr13 goes somewhere away from this noisy PC rig to see if he can pick up anything on 20m
[10:08] <Darkside> hold on
[10:08] <Darkside> uploading a screenshot
[10:08] <Darkside> https://i.imgur.com/m8ENFiV.png
[10:09] <Darkside> subtract 125MHz from the frequency values to get the actual frequency
[10:11] <edmoore> gosh
[10:11] <edmoore> looks like the matrix
[10:11] <Darkside> im getting a friend to get me a decent IQ recording
[10:11] <Darkside> so I can do up a decent spectrogram of it, as a wallpaper :P
[10:13] <edmoore> good choice of test picture hackaday http://hackaday.com/2014/11/29/recovering-colour-from-pal-tele-recordings/#comments
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[10:29] Nick change: MichaelC1 -> MichaelC
[10:39] <mikestir> I remember seeing that thing about re-colouring doctor who on blue peter in the 80s
[10:39] <mikestir> I'm sure the thing about there being remnants of PAL on the cine recordings is total tosh
[10:39] <mikestir> they were using the chroma from crappy vhs recordings and the luma from the cine
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[11:31] <Oddstr13> Darkside: I'm hearing plenty of CW around 13.6MHz here :P
[11:31] <Darkside> err
[11:31] <Darkside> 13.6?
[11:31] <Darkside> that doesnt sound right
[11:31] <Oddstr13> it's a cheap pocket radio :P
[11:31] <Darkside> sounds like its off frequency a bit
[11:32] <Oddstr13> it's a Denver TWR-804
[11:33] <Oddstr13> http://www.denver-electronics.com/denver-twr-804/
[11:33] <Darkside> oh haha
[11:33] <Darkside> yeah ok
[11:36] <Oddstr13> I'm amazed that it can find CW at all :P
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[11:44] <Oddstr13> Darkside: any idea of where i can find interesting signals, above 24MHz?
[11:44] <Darkside> err
[11:44] <Darkside> probably just the 12m and 10m bands
[11:44] <Darkside> and maybe 11m CB
[11:44] <Darkside> not sure you can call that interesting though
[11:45] <Oddstr13> too much cw at 28MHz for my taste :P
[11:46] <Oddstr13> actually, one of the cw signals is quite strong
[11:46] <Oddstr13> as in, local strong
[11:48] <Oddstr13> http://satomi.openshell.no/tmp/Screenshot%20-%2011302014%20-%2012%3a47%3a10%20PM.png
[11:48] <Oddstr13> now, if I could get fldigi to see 'stereo mix' that'd be great :P
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[11:52] <Oddstr13> there we go
[11:52] <Oddstr13> awesome
[11:53] <Reb-SM0ULC> Oddstr13: what radio are you using?
[11:53] <Oddstr13> for gqrx, the RTL-SDR
[11:58] <Oddstr13> now I only need that rig control connection going between gqrx and fldigi :P
[12:00] <Oddstr13> Reb-SM0ULC: how so?
[12:07] <Oddstr13> R1941MB found this guy calling QRZ on 28.413MHz USB ^^
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[12:46] Nick change: phil -> Guest77630
[12:47] <Guest77630> Hi, what is the best way to get helium for high altitude flights? To buy disposable or to rent canisters?
[12:49] <mikestir> Oddstr13: you might get the 10m repeater in new york on 29.620 FM
[12:51] <Oddstr13> mikestir: from across the atlantic? I find that somewhat unlikley :P
[12:52] <mikestir> Guest77630: rent a cylinder unless it's only a small balloon
[12:52] <mikestir> Oddstr13: no really
[12:52] <Oddstr13> okay
[12:52] <mikestir> yes I can hear it now
[12:52] <mikestir> it fades in and out, but at this time of day in the winter you can get it s9+60 in western europe
[12:52] <mikestir> I've worked through it on 5W
[12:53] <Oddstr13> JP52AQ
[12:53] <mikestir> yeah you'll probably get it at some point during the next few hours
[12:53] <Oddstr13> mkay
[12:55] <mikestir> propagation tends to open up to areas about the size of the UK, maybe a bit larger
[12:55] <Oddstr13> cool
[12:55] <mikestir> it's usual to work stations throughout england, scotland and maybe france/germany through it
[12:57] <Oddstr13> this is Voice? or are there digital modes too?
[12:57] <mikestir> that's FM voice
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[12:58] <mikestir> I can hear a few US stations now so the band is starting to open up
[12:58] <mikestir> 28.405 USB
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[13:00] <Oddstr13> saw something there
[13:01] <mikestir> there's psk31 on 28.119
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[13:08] <DL7AD> morgning
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[13:08] <Bob_Saget> morning? it's 9 PM lol
[13:08] <mikestir> it's always morning on irc
[13:08] <Oddstr13> UGT FTW
[13:09] <Oddstr13> mikestir: I can see and hear it, can't seem to get any decodes tho
[13:09] <mikestir> the psk?
[13:10] <Oddstr13> yea
[13:10] <mikestir> set fldigi to bpsk31?
[13:10] <mikestir> rx to usb
[13:10] <Oddstr13> tried both 31 and 63
[13:11] <mikestir> quite a few middle east stations on there
[13:12] <SpacenearUS> New position from 03AETH31-8 after 03a day silence - 12http://habhub.org/mt/?focus=AETH31-8
[13:12] <mikestir> Oddstr13: http://imgur.com/LCGGQ8P
[13:14] <Oddstr13> I'm just getting junk :P
[13:14] <lz1dev> !hysplit run aeth31-8
[13:14] <SpacenearUS> 03lz1dev: Your job has been added to the queue. Check in a few minutes
[13:16] <Oddstr13> I guess my audio setup isn't perfect for this
[13:16] <mikestir> did you say you're using gqrx on linux?
[13:16] <Oddstr13> yep
[13:17] <mikestir> what are you using for the audio loopback? pulseaudio?
[13:17] <Oddstr13> indeed :P
[13:17] <Oddstr13> I'm guessing that isn't ideal for PSK
[13:17] <mikestir> that's probably the problem. depending on the version there's a bug that causes the sample rate to be wrong
[13:18] <mikestir> result is that the looped back audio is too fast (or too slow, can't remember)
[13:18] <Oddstr13> more or less upstream I'd guess, Archlinux
[13:18] <mikestir> that obviously screws up any data modes
[13:18] <mikestir> if it's upstream then it's probably fixed, but it might be worth trying an analogue loopback
[13:18] <Oddstr13> well, I got CW to decode xD
[13:18] <mikestir> yeah but cw isn't going to be affected by a minor speed difference
[13:18] <Oddstr13> hehe, ik <3
[13:18] <Oddstr13> pulseaudio 5.0
[13:19] <Oddstr13> what do you suggest for loopback? preferably something that can run alongside pulseaudio
[13:19] <mikestir> a cable!
[13:20] <Oddstr13> hm..
[13:21] <Oddstr13> integrated soundcard is fried or something, so i'm using a USB headset atm
[13:21] <Oddstr13> I guess I could try and see if HDMI audio works under linux
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[13:22] <Oddstr13> or, I could just boot windows.. altho I'd love to have a working setup in Linux, one less reason to boot Windows :P
[13:24] <Oddstr13> mikestir: also, am I right in thinking that's a radar of sort just above the BPSK now?
[13:28] <mikestir> don't know. there's more cw above the psk here
[13:30] <Oddstr13> it's quite weak now
[13:33] <mikestir> KQ2H is pretty strong now
[13:34] <mikestir> fully quieting here
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[13:38] <Oddstr13> I see only noise at 29.620
[13:38] <mikestir> it's fading a bit but peaking hard over on the S meter
[13:39] <mikestir> stations in nl and greece on there so maybe propagation is too far south for you
[13:39] <mikestir> remember it's FM not USB
[13:39] <Oddstr13> yep, NFM
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[13:40] <Oddstr13> quite easy to distinguish NFM from USB
[13:40] <Oddstr13> on the waterfall anyway
[13:40] <mikestir> yeah definitely
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[13:44] <Oddstr13> I'm seeing some weak signal at 29.560 MHz
[13:45] <Reb-SM0ULC> Oddstr13: slow anser.. just wondered if it was funcue or other, my 820t:s have not much dynamic in the hf-range
[13:45] <mikestir> Oddstr13: how accurate is your tuning?
[13:45] <Oddstr13> mikestir: quite
[13:45] <mikestir> ok
[13:46] <Oddstr13> tuned it against the local police band :P
[13:46] <Oddstr13> 38ppm frequency correction
[13:49] <Oddstr13> now I see a weak signal at 29.6 MHz
[13:51] <Oddstr13> just a short burst of a transmission, bearly visible over the noise
[13:52] <Oddstr13> Reb-SM0ULC: also, dynamic as in signal vs. noise?
[13:53] <Oddstr13> cause this thing is quite far from great
[13:53] <mikestir> what are you using? rtl sdr and some sort of upconverter?
[13:54] <Oddstr13> just the RTL-SDR and a random wire antenna
[13:54] <Oddstr13> can tune down to about 24MHz
[13:54] <Oddstr13> Bus 007 Device 006: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
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[14:00] <Reb-SM0ULC> Oddstr13: yepp, i have about 30 db..
[14:01] <Oddstr13> Reb-SM0ULC: not sure of how to measure that
[14:02] <Reb-SM0ULC> Oddstr13: sri! i meant from 0 to noise
[14:02] <Oddstr13> YO4RIU <-- I'm hearing that guy calling CQ DX at 28.465 MHz
[14:03] <mikestir> bogdan?
[14:03] <mikestir> big signal here
[14:03] <mikestir> yeah. S9+20
[14:04] <mikestir> can you hear the US station?
[14:04] <Oddstr13> only hear half of the conversation
[14:05] <mikestir> .477
[14:05] <Oddstr13> not really suprising to hear someone from Romania, as I've on several occasions listened to Radio Romania International :P
[14:05] <Oddstr13> can't see anything at 477
[14:07] <mikestir> quite strong. maryland
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[14:08] <Oddstr13> Might not be optimaly positioned for receiving from the US
[14:09] <mikestir> I suppose its dark for you now isn't it?
[14:09] <Oddstr13> I live in a valley that goes more or less north-south, on the west side of it
[14:09] <mikestir> probably a bit too late
[14:09] <Oddstr13> nah, not dark yet
[14:09] <Oddstr13> it's starting to get darker tho
[14:10] <mikestir> http://www.voacap.com/prediction.html
[14:10] <mikestir> this will show you which bands are open between two points
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[14:10] <Oddstr13> I'm in the dark according to that map, yes
[14:11] <Oddstr13> http://satomi.openshell.no/tmp/Screenshot%20-%2011302014%20-%2003%3a06%3a35%20PM.png
[14:15] <Oddstr13> I have a feeling my antenna is somewhat undersized too :P
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[14:19] <mfa298> for 29Mhz you want around 2.5m of wire, and ideally some radials as well
[14:20] <mfa298> although you might get some interesting results with a longer wire and a variable cap between the wire and dongle
[14:20] <Oddstr13> I have about 1.6m
[14:21] <Oddstr13> roof -floor
[14:21] <Oddstr13> kinda dosn't fit much more :P
[14:21] <mfa298> getting the wire outside could make a difference as well (assuming it's indoors currently)
[14:21] <Oddstr13> it is :P
[14:21] <Oddstr13> hanging from the roof
[14:22] <mfa298> if you've got something to attach it to you could go for a horizontal wire (tree to building)
[14:22] <Oddstr13> it's the inner wire from a phone cord (cat3 or something like that i guess)
[14:23] <Oddstr13> trees i can manage :P
[14:24] <mfa298> for HF antennas are as much about trying things out and seeing what works for the location as any form of science.
[14:24] <mikestir> my hf antenna is made out of single core mains conduit wire
[14:24] <mfa298> you might find different setups work for different things
[14:24] <mikestir> the grey phase - it had a higher wife acceptance factor than the blue or brown :)
[14:24] <Oddstr13> haha
[14:25] <Oddstr13> I'll see if I can find some yellow/green grounding wire :P
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[14:26] <Oddstr13> I'd probably need some connectors too I guess
[14:27] <Oddstr13> ...something of a better quality than those crappy TV antenna connectors I found at a store some time ago
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[14:27] <mikestir> you really need some sort of balun or tuner to interface it to the coax. not such a big deal for receive-only, but if you don't have that then the feeder becomes part of the antenna and can pick up noise from inside the house
[14:27] <mfa298> I wonder if you could use some twin core mains flex as a balanced feeder. Going to be pretty low impedance but could make for an interesting setup
[14:28] <mikestir> mfa298: I used speaker cable for the windings in my balun. went through my box of junk cable measuring various offcuts to find the one with the right spacing :)
[14:28] <Oddstr13> speaker cable I actually have quite a bit of :P
[14:29] <Oddstr13> how would I go about making baluns?
[14:29] <mikestir> well a good start for rx would be a simple choke balun made just by winding some turns of the coax up at the antenna end
[14:30] <Oddstr13> Wonder where I can buy coax cable nearby...
[14:30] <mikestir> http://www.mike-stirling.com/gallery3/index.php/Radio/DSC_2027
[14:31] <Oddstr13> nice
[14:31] <mfa298> if the speaker cable was used as the feeder as well you might get away without the balun. split the 2 cores to make a dipole antenna then keep them together between the antenna section and the connection to the dongle, one side to the centre, other side to the outer part of the connector on the dongle
[14:31] <Oddstr13> like old-style TV antennas
[14:32] <mikestir> yeah fm tuners quite often used to come supplied with an antenna that was basically that, and they always worked pretty well
[14:32] <mfa298> Oddstr13: the coax turns on this are a basic choke balun http://m1ari.co.uk/antenna/diy-dipole
[14:33] <Oddstr13> I've found random wire typ cat5 inner wires to work excellent for FM :P
[14:33] <Oddstr13> mfa298: yea, I've seen them in QFH antenna builds
[14:34] <Oddstr13> never had any coax cable on hand tho
[14:34] <Oddstr13> except from old used ones from TV installations, that are kinda destroyed by UV
[14:34] <mikestir> not got any old 10-base 2 ethernet coax?
[14:35] <Oddstr13> nope
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[14:35] <Lunar_Lander> hello
[14:35] Action: mfa298 has several drums of coax
[14:35] <mfa298> one of which was originally bought for 10base2
[14:36] <Oddstr13> I have a drum or so of inndoor phone cable, and some cat5, also a drum of speaker cable
[14:36] <Oddstr13> actually, nvm the cat5, I belive I've used most of that one for networking
[14:37] <Oddstr13> what should I look for when buying coax cables?
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[14:38] <mfa298> for hf rg58 is generally ok.
[14:38] <mikestir> or rg8x is a bit more substantial if it's a longer run
[14:38] <mfa298> otherwise you generally want 50 ohm, and the lowest loss you can afford
[14:39] <mfa298> although size and flexibility might play a role depending on use.
[14:39] <Oddstr13> hm..
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[14:41] <Oddstr13> aww, no more hf for today it seems, most of it has faded away by now
[14:41] <Oddstr13> getting quite dark too
[14:41] <mikestir> yeah the higher hf bands fade after dark
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[14:42] <Oddstr13> Yep, and that leaves me with just the police band, and commercial WFM stations, mostly
[14:42] <mikestir> weather satellites
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[14:43] <Oddstr13> don't have antenna for that yet :P
[14:43] <mikestir> you can get them on a telescopic whip when they're overhead
[14:43] <Oddstr13> I've tried tuning to the NOAA satellites as they pass over, but can't see anything on the waterfall
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[14:44] <mikestir> I can remember getting packet from Mir when that was up, using a whip indoors
[14:44] <Lunar_Lander> nice
[14:44] <arjunnaha> Can someone point me in the direction of the spacenear.us API?
[14:44] <Lunar_Lander> can you still receive meteosat directly?
[14:44] <mikestir> if they do a spacewalk from the ISS their suit comms is also a massive signal
[14:44] <mikestir> have had that S9 inside the house on a little rubber duck
[14:46] <Oddstr13> nice
[14:46] <mikestir> arjunnaha: I don't think it really has one, you just need to talk direct to couchdb http://habitat.readthedocs.org/en/latest/
[14:47] <arjunnaha> Ah, okay thanks mikestir
[14:47] <Oddstr13> mikestir: any particularly interesting satellites?
[14:48] <Lunar_Lander> with directly I mean if there is some sort of video stream from the satellite
[14:48] <mikestir> there's a couple of amateur radio ones, funcube being the obvious one if it's still working
[14:48] <mikestir> last couple of times I tried that it was very weak, but when it first went up it was easy
[14:48] <Lunar_Lander> I recall that our science museum had a weather station with a screen showing the meteosat image building up line by line
[14:49] <mikestir> Lunar_Lander: I don't think you can. they moved it all to hotbird via some DVB-T based IP data service
[14:49] <Lunar_Lander> ah ok
[14:49] <mikestir> DVB-S even
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[14:49] <mikestir> you can still receive the VHF APT from the LEO sats though
[14:50] <Lunar_Lander> ah just seeing "raw data cannot be received without license key"
[14:50] <Lunar_Lander> but I recall a homebuilt receiver from the time around Meteosat 3
[14:50] <Lunar_Lander> yea
[14:50] <Lunar_Lander> APT was that "free to all" system for simple ground stations if I remember the one book I read correctly
[14:51] <SpacenearUS> New vehicle on the map: 03CALLSIGN123_chase - 12http://habhub.org/mt/?focus=CALLSIGN123_chase
[14:51] <Oddstr13> arn't there still a few NOAA satellites that transmit APT still?
[14:52] <mikestir> noaa18 is over now
[14:52] <mikestir> 137.9125
[14:52] <mikestir> be quick!
[14:52] <mikestir> you can hear the tick/tock
[14:53] <mikestir> good timing, but it's almost gone here. looks like you have a bit longer Oddstr13
[14:53] <Oddstr13> nope, I need a better antenna for it
[14:53] <Oddstr13> yea, also, gpredict ftw
[14:54] <Oddstr13> had it open, so was just a copule o clicks to have it tracking it :P
[14:54] <Oddstr13> LOS in 1:40 according to it
[14:54] <mikestir> next pass is at 1620UTC and it's a bit higher here
[14:55] <Oddstr13> next one is 16, but i'm not sure if that one still transmits
[14:55] <Oddstr13> 17 comes right after
[14:55] <mikestir> 15, 18 and 19 seem to be the ones you want
[14:56] <Oddstr13> too bad wxtoimg didn't like my setup :P
[14:56] <Oddstr13> works great under windows tho
[14:58] <Oddstr13> next pass of ISS is 23:00 this evening
[14:58] <amell> !ping B-64
[14:58] <SpacenearUS> 03amell: Last contact with 03B-64 was 037 days ago
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[14:59] <amell> RIP B-64
[15:00] <Oddstr13> amell: last seen on iceland, passing north-east-east
[15:00] <amell> Look forward to Leobodnar launching something new.
[15:00] <Oddstr13> probably out of power :P
[15:00] <SpeedEvil> I think he's been prepping one a week, now has 20 ready to go.
[15:00] <Oddstr13> it's quite dark up north at this time of year
[15:01] <amell> SpeedEvil: seriously? :)
[15:01] <SpeedEvil> yes, totally 100% serious.
[15:01] <SpeedEvil> With sprinkles.
[15:01] <amell> Ill be very surprised if B-64 reports back in now.
[15:01] <amell> Its probably done another lap with the wind speeds at this time of year.
[15:02] <SpeedEvil> It's happened with B6[36]
[15:02] <SpeedEvil> it died for ~5 days and then came back to life
[15:02] <Oddstr13> amell: but what a plesant suprise that would be!
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[15:02] <amell> yeah, but this is now 7 days.
[15:02] <amell> and it will have covered a lot of ground in those 7 days.
[15:02] <Oddstr13> how long does a pacific crossing usualy take it?
[15:02] <amell> at this time of year, 3 days tops
[15:03] <Oddstr13> still wouldn't write it off 100% then
[15:04] <mikestir> Oddstr13: did you try the beta version of wx2img
[15:04] <mikestir> ?
[15:05] <Oddstr13> i tried the 64bit linux version earlier today, but it seemed to only support oss, so i put it away again
[15:06] <mikestir> the beta version supports alsa
[15:06] <Oddstr13> that's nice
[15:06] <mikestir> seems to play ok with pulse
[15:06] <Oddstr13> ah, compleetly missed the beta link
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[15:07] <Oddstr13> "other ARM".. armv6h you mean?
[15:10] <SpacenearUS> New vehicle on the map: 03HABDUINO - 12http://habhub.org/mt/?focus=HABDUINO
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[15:24] <Oddstr13> mikestir: seems to work excellent
[15:25] <mikestir> looks like there's a noaa15 pass shortly before the next noaa18 one so that might be worth a go
[15:25] <Oddstr13> plays along nicely with my audio setup
[15:25] <Oddstr13> I'm cheating :P https://www.youtube.com/watch?v=OARj5wguj6M
[15:26] <Oddstr13> decodes just as well for me, as in the video, aka audio setup works
[15:29] <Oddstr13> funcube is overhead now actually
[15:30] <Oddstr13> won't be for longm and it's rather low
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[16:08] <Herman-PB0AHX> !flights
[16:08] <SpacenearUS> 03Herman-PB0AHX: Current flights: 03B-64 434.500 Contestia 64/1000 10(3afe)
[16:08] <DL7AD> !hysplit B-64
[16:08] <SpacenearUS> 03DL7AD: HYSPLIT for 03B-64 - 12http://spacenear.us/tracker/hysplit_cache/141130-10_122907_B64.gif
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[16:16] <mikestir> noaa15 incoming Oddstr13
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[16:18] <MarkIreland> could the Pi do image processing using openCV AND simultaneously record video at 1080p ?
[16:19] <MarkIreland> the video would have no processing done on it, just plain video record
[16:19] <MarkIreland> I dont need to record the processing
[16:19] <Oddstr13> why do you want 1080p video?
[16:20] <MarkIreland> highest quality
[16:20] <MarkIreland> 720 would be acceptable I guess
[16:20] <MarkIreland> but nothing less
[16:20] <Oddstr13> I'd go for 720p
[16:21] <MarkIreland> do you know the answer?
[16:21] <Oddstr13> no idea
[16:21] <MarkIreland> lol, thanks
[16:21] <Oddstr13> I just know that my Pi dosn't like USB particulary well
[16:23] <Oddstr13> mikestir: not seeing anything looking remotly like APT on the waterfall
[16:23] <mikestir> noaa18 is going over now as well on 137.9125
[16:24] <mikestir> that's much stronger to me
[16:24] <Oddstr13> where are you located?
[16:24] <mikestir> north west england
[16:24] <mikestir> problem with using a normal comms receiver for wx sats is that the FM IF bandwidth is a bit too narrow
[16:26] <mikestir> very strong now
[16:26] <mikestir> looks like a nice sunset image
[16:27] <Oddstr13> I'm not getting anything
[16:27] <Oddstr13> what kind of antenna are you using?
[16:27] <mikestir> X30
[16:27] <mikestir> not really ideal
[16:27] <mfa298> MarkIreland: with the python camera library I think you can pull off a few streams from the camera to do different things with it
[16:27] <MarkIreland> ah really, at the same time mfa298?
[16:28] <mfa298> might depend on what processing your doing as to whether it's successful or not
[16:28] <MarkIreland> that sounds ideal
[16:28] <MarkIreland> I'll give it a go and see how far I get
[16:28] <Oddstr13> mikestir: well, i'm using that 1.6m random wire antenna :P
[16:28] <mikestir> yeah at least mine's on the roof
[16:29] <Oddstr13> yep :P
[16:29] <Oddstr13> duno if i want antennas on the roof here, really..
[16:29] <mikestir> it's kind of necessary if you want to receive anything
[16:29] <Oddstr13> lightning storms tend to be rather severe right here
[16:30] <Oddstr13> has melted the phone line a copule of times :P
[16:30] <mfa298> MarkIreland: there's some diagrams here http://picamera.readthedocs.org/en/latest/fov.html#under-the-hood
[16:30] <mfa298> and a few examples of feeding opencv, recording multiple resolutions etc. elsewhere in that doc.
[16:31] <Oddstr13> mikestir: we'll see what I end up doing
[16:33] <Oddstr13> If I'm able to do remote RTL-SDR with the Pi properly, i have a rather large area i can mount the antennas on
[16:34] <Oddstr13> anyways, I need some sleep
[16:39] <Oddstr13> Good night
[16:40] <MarkIreland> mfa298: Thanks very much, I'll have a look!
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[16:45] <MarkIreland> mfa298: From the docs: The camera is capable of recording multiple streams at different resolutions simultaneously by use of the video splitter. This is probably most useful for performing analysis on a low-resolution stream, while simultaneously recording a high resolution stream for storage or viewing.
[16:45] <mfa298> I'm not sure if it'll let you do exactly what you want but seems like a good place to start
[16:45] <MarkIreland> exactly what I want. nice
[16:45] <mfa298> that sounds hopeful
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[17:39] <qyx_> what are the aeth doing
[17:40] <qyx_> ah, only one is new?
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[22:20] <SpeedEvil> https://www.kickstarter.com/projects/torquing/zano-autonomous-intelligent-swarming-nano-drone
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[22:50] <chrisstubbs> SpeedEvil a £139 selfie drone is just what we need
[22:50] <SpeedEvil> yeah
[22:50] <SpeedEvil> I found some interesting aspects of it though
[22:51] <chrisstubbs> I agree it looked quite cool until I read the word "selfie"
[22:51] <SpeedEvil> Plus - in-app-purchases.
[22:51] <SpeedEvil> 'loop-the-loop' 50 for a pound
[22:51] <chrisstubbs> yay
[22:52] <chrisstubbs> Thanks for backing us and allowing us to make our thing. Now you just have to pay us to use it!
[22:53] <SpeedEvil> Any bets it's not running linux?
[22:57] <chrisstubbs> Probably ;)
[22:58] <chrisstubbs> To be fair to them they have packed a lot into a tiny device, and its not hugely expensive
[22:59] <SpeedEvil> In principle - logging all the flight data and returning it would give _awesome_ flight envelope data
[23:00] <SpeedEvil> 'we noticed you crashed' '4 pounds for a spare set of propellors'
[23:01] <chrisstubbs> I do wonder how functional the prototype is. It could just be some 3D printed parts stuck onto a cheap £30 quad.
[23:01] <SpeedEvil> yeah
[23:04] <chrisstubbs> Right it's sleep time, laters!
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[23:44] <Lunar_Lander> good night
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[23:46] <DL7AD> does anybody know something about the available of GALILEO receiption by the ublox MAXX7 modules?
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[00:00] --- Mon Dec 1 2014