highaltitude.log.20160302

[00:00] <DL7AD> :D
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[00:00] <fsphil> split them in two :)
[00:00] <dbrooke> base91 should pass
[00:00] <fsphil> 128 + 128
[00:00] <DL7AD> fsphil: no..... that hurts too much
[00:01] <fsphil> you're already hurting :)
[00:01] <DL7AD> rollingeyes
[00:01] <fsphil> what's the largest packet you can do with base91?
[00:02] <fsphil> I would like to see it work over aprs, it could be worth an extra variant
[00:02] <DL7AD> 256 / (log(91)/log(2)) * 8
[00:02] <DL7AD> ehm wait
[00:02] <DL7AD> 6,50779464 bits per char
[00:03] <DL7AD> fsphil 208
[00:03] <fsphil> not too bad
[00:03] <DL7AD> 208 bytes
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[00:04] <DL7AD> fsphil: again. what is the reason exaclty not to drop the SSDV-CRC?
[00:04] <fsphil> to keep it compatible, but we're already past that
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[00:05] <dbrooke> would you not have to fit it into the comment field of an APRS packet?
[00:06] <DL7AD> no
[00:06] <DL7AD> i send it with an experimental flag. => "{"
[00:06] <DL7AD> dbrooke: there are different types. "/" for position and ":" for message.
[00:07] <DL7AD> and "{" for experimental
[00:07] <dbrooke> OK, I see
[00:08] <fsphil> I'll take a look at it tomorrow DL7AD
[00:08] <DL7AD> fsphil: thanks :)
[00:08] <dbrooke> so {UX loses you 3 bytes
[00:09] <dbrooke> well {{X I guess
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[00:09] <DL7AD> dbrooke: no i think its not part of the information field
[00:09] <DL7AD> so i think its not inside these 256byte
[00:10] <DL7AD> dbrooke: base91 is a good idea though
[00:10] <DL7AD> th compressed format does it too
[00:12] <dbrooke> Ithink those 3 bytes are the start of the information field
[00:12] <dbrooke> but yes, base 91 is used already so should be safe
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[00:13] <DL7AD> im actually transmitting {{I to flag an image....... "I" for image (use defined)
[00:13] <DL7AD> the first "{" stands for user-defined
[00:13] <DL7AD> i cant remember what the second "{" does
[00:13] <KT5TK> experimental
[00:14] <DL7AD> and the first?
[00:14] <KT5TK> user-defined
[00:14] <DL7AD> okay
[00:14] <DL7AD> user-defined experimental image :D
[00:14] <KT5TK> {{ = user-defined, experimental
[00:15] <KT5TK> it is part of the information field though
[00:15] <dbrooke> that should work, but I wouldn't be surprised if some igate implementations dropped it as unknown
[00:16] <KT5TK> means 256 - 3 bytes availab;e
[00:17] <dbrooke> that's my understanding too
[00:18] <KT5TK> I think xastir has a bug because they try to implement { packets in the source code. It still doesn't work for me
[00:19] <KT5TK> I need to confess, I didn't understand all the xastir source code though
[00:20] <dbrooke> I've really only used it to show a map, I use aprx to igate
[00:20] <KT5TK> aprx might be an option for DL7AD
[00:20] <dbrooke> but I've not used any of it with experimental packets
[00:21] <KT5TK> At least worth a try
[00:21] <DL7AD> dbrooke: we did already for our log
[00:22] <dbrooke> aprx code may well be easier to understand, at least it has no GUI cluttering things up 8-)
[00:23] <dbrooke> well it sounds interesting, but I need to sleep, so good night for now
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[00:31] <DL7AD> dbrooke: gn
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[01:24] <hosler> anyone use SDR dongle on linux and can recommend a good software app
[01:33] <Ian_> I think that GQRX is the only one that I know about, unless you want to get involved in GNURadio
[01:33] <Ian_> GQRX is standard with most distros and available in the Ham Radio section of the repositories.
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[01:39] <hosler> yeah im compiling that now
[01:39] <hosler> do i need any special kernel drivers or qill gqrx take care of me?
[01:39] <hosler> will*
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[01:48] <Ian_> Compiling? what distro are you using? Mostly these things are available in the distro's repositories or associated ones.
[01:48] <Ian_> I'm a SUSE user, but a bit out of date at 12.2 so well out of support
[01:49] <Ian_> Linux requires no drivers, they all tend to be in the kernel
[01:50] <Ian_> Libraries perhaps.
[01:51] <hosler> gentoo
[01:52] <hosler> so everything gets compiled and i gotta config my own kernels
[01:53] <Ian_> OK, don't really know it except the Penguin and yes, high expectation from the user :)
[01:53] <hosler> im in love with gentoo. so easy to manage
[01:53] <hosler> but pain in the butt to install
[01:53] <hosler> especially on slow computers
[01:54] <Ian_> I have variously tried a few flavours of Ubuntu over the years and generally settled on SUSE.
[01:54] <Ian_> Ubuntu always added what they thought was the best of every type of application program
[01:54] <hosler> yar. i dont really like ubuntu because it takes over my system. when stuff breaks i dunno how to fix it with ubuntu in the way.
[01:55] <Ian_> SUSE just gave you heaps of everything and let you choose from maybe 20 clocks for example
[01:55] <hosler> i tried suse once. the 2 different package managers threw me off
[01:56] <Ian_> The problem with Ubuntu is one release is good next broken etc. SUSE uses YAST2 for almost all config and just generally works exceptionally well
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[01:56] <hosler> lol im watching a youtube vid of a bunch of people talking to the ISS via HAM radios
[01:56] <hosler> looks fun
[01:57] <Ian_> :)
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[02:01] <hosler> dvb_usb_rtl28xxu
[02:01] <hosler> is the driver i think
[02:02] <hosler> wont be able to test it out till it gets here on thursday tho
[02:02] <Ian_> I'll keep an eye out for your update.
[02:02] <Ian_> Good luck with the postman and the Pengiun
[02:03] <hosler> im a noob so all this is very exciting for me still hah
[02:03] <hosler> radios and such
[02:05] <Ian_> It's steep when trying to take in radio, embedded computing and HAB regs all at once
[02:05] <hosler> ive been doing embedded stuff for years
[02:05] <hosler> but yeah radio and HAB is new for me
[02:05] <Ian_> Ah, well not quite . . . so steep :)
[02:06] <Ian_> Got or getting a Ham Licence?
[02:06] <hosler> getting one on april 3
[02:07] <Ian_> Good luck, should be a relative breeze as I assume doing embedded you have a fair grasp on electrics, so not much more to do for your ticket.
[02:07] <Ian_> G0PAI here
[02:07] <hosler> is that your call sign
[02:07] <Ian_> Yes
[02:07] <hosler> cool
[02:08] <Ian_> I was a telegraphist for many years and then into mainframe computer operation with DEC KI10 then Data General kit before \
[02:10] <Ian_> becoming a programmer and back to DEC PDP11, then hopped forward with Sun Solaris and Ingres Rdb
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[02:18] <hosler> wow nice
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[02:22] <hosler> oldschool
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[02:41] <SpacenearUS> New position from 03SP9UOB-11 after 032 days silence - 12http://tracker.habhub.org/#!qm=All&q=SP9UOB-11
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[03:31] <Ian_> Very old school, but not done yet a while :)
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[05:09] <Vaizki> Ingres.. did you get therapy? :O
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[05:09] <Vaizki> Quel .. mmmm...
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[06:51] <SA6BSS-Mike> thats cool ,sp9uob over China
[06:53] <SpacenearUS> New position from 03IK8SUT-11 after 03a day silence - 12http://tracker.habhub.org/#!qm=All&q=IK8SUT-11
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[07:59] <SpacenearUS> New position from 03WB8ELK-6 after 03a day silence - 12http://tracker.habhub.org/#!qm=All&q=WB8ELK-6
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[08:07] <SA6BSS-Mike> wow, wb8elk made it over atlantic!
[08:17] <Upu> aweomse
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[08:49] <AndyEsser> morning
[08:49] <habby> morning :)
[08:50] Action: AndyEsser is itching to finish to his tracker
[08:50] <habby> Who thinks this is doable... http://predict.habhub.org/#!/uuid=73165016001a7e9e0be5e1de2127c96896e75579
[08:51] <habby> Last night it put us in the Solent. Yesterday afternoon, it was on Salisbury Plain
[08:52] <habby> Is 30km from the coast enough wriggle room?
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[09:02] <Vaizki> not an expert.. but if you underfill at all and end up with 4m/s ascent then you're swimming
[09:03] <number10> if it goes highr - it ends up further east http://predict.habhub.org/#!/uuid=5b6aec4ff91483fca76b313ba524e7fa91de110e
[09:04] <Vaizki> wow wb8elk? it's taken the LONG way 'round :O
[09:04] <number10> more likely to do this http://predict.habhub.org/#!/uuid=2005f3fde6e37429a01e6f3adb89a2d46cfae636
[09:05] <Vaizki> oops sorry no it hasn't .. my bad
[09:05] <daey> iw WB8ELK an open balloon?
[09:06] <daey> is*
[09:06] <Vaizki> number10, if you lower the ascent rate it will be in the channel soon
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[09:07] <Vaizki> but if it goes up fast enough, should stay dry
[09:09] <habby> Thanks all. Going to leave it until later in the week.
[09:10] <number10> I would
[09:10] <number10> leave it thaat is
[09:10] <Vaizki> paint NIKE on it and Just Do It
[09:10] <number10> unless you are well practiced at filling like dave or steve
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[09:20] <daveake> It's more the launch winds which build up during the morning, making it not so easy to get the right fill or to launch. As habby's first flight it'll run behind schedule so the wind will IMO be a bit too strong.
[09:20] <habby> Hi number10, we're launching from dave's place, but he has suggested leaving it until later in the week when the winds aren't as strong.
[09:20] <habby> ...Timing!
[09:20] <number10> I would take his advice :-)
[09:20] <daveake> Mucvh easier and more pleasant when there's little wind
[09:23] <habby> number10 We will be sure to, at every stage! We are extremely grateful for his help (and everyone on here!)
[09:25] <habby> My next project is getting my new Airspy Dongle attached and running on a Raspberry Pi 3. With the 3's extra processing power, I think it might avoid the issues others have faced?
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[10:07] <WB8ELK> Hello EUROPE...I finally got a pico balloon across the big Pond. http://tracker.habhub.org/#!mt=roadmap&mz=6&qm=3_days&f=WB8ELK-6
[10:08] <craag> awesome stuff WB8ELK
[10:09] <AndyEsser> WB8ELK: awesome :)
[10:09] <craag> across in just under 3 days too?
[10:09] <AndyEsser> Does it include a car package of american candy and things?
[10:09] <Upu> congrats Bill
[10:09] <Upu> yeah and it went quite north
[10:09] <AndyEsser> care*
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[10:10] <WB8ELK> Thanks....the candy will be on the one with 100 pico balloons :-)
[10:10] <AndyEsser> :)
[10:10] <AndyEsser> the American candy store here in Chester is so expensive :(
[10:10] <WB8ELK> I was quite worried about the big storm in the mid-Atlantic it had to avoid.
[10:10] <WB8ELK> I launched it at sunset on Saturday
[10:11] <WB8ELK> I was on the heavy side too...19 gram payload with 2.8 grams of free lift.
[10:11] <Upu> is it solar ?
[10:12] <WB8ELK> Solar panels and 220 mAh Lipo.
[10:12] <WB8ELK> PowerFilmSolar panels
[10:12] <Upu> jolly good
[10:12] <craag> nice
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[10:14] <R34lB0rg> oh wow, 2 flight over pl, 1 de, 1 it and WB8ELK over fr
[10:19] <WB8ELK> Photo of WB8ELK-6 payload: http://imgur.com/a/anllR
[10:24] <R34lB0rg> nice
[10:24] <WB8ELK> Photo of launch of previous flight: http://i.imgur.com/3B1OQAy.jpg
[10:26] <WB8ELK> Missed the power mains somehow at launch: http://imgur.com/B6nhJ1F
[10:34] <craag> qualatex 36" WB8ELK ?
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[10:39] <WB8ELK> Yep...Qualatex Suprafoil 36-inch. 22 grams lift 19.2 gram payload
[10:40] <craag> thanks. well done!
[10:40] <craag> just aprs telemetry?
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[10:43] <WB8ELK> Yes...just APRS on this one. Frequency agile depending on the region.
[10:43] <WB8ELK> The WSPR balloon will likely be this coming Saturday on 20 meters.
[10:44] <WB8ELK> The WSPR balloon uses the same PC board and is on the air testing under the callsign: WB8ELK . You can view it at wsprnet.org. I parse it and resend it to APRS.FI under the call: WB8ELK-7
[10:45] <craag> awesome stuff :)
[10:45] <fsphil> oooh congrats WB8ELK :)
[10:46] <R34lB0rg> yeah, awesome
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[10:49] <R34lB0rg> WB8ELK, you designed the tracker from scratch?
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[10:51] <Rebounder> WB8ELK: congrats :)
[10:55] <edmoore> R34lB0rg: WB8ELK invented this hobby
[10:56] <edmoore> congratulations Bill
[10:57] <craag> I heard WB8ELK flew one of the first GPS receivers? Rather different size/power to the MAX7 I bet!
[10:57] <edmoore> i imagine so :)
[10:57] <edmoore> even the early ubloxes flown on the nova1/2 trackers were sort-of 120mA continuous
[10:57] <edmoore> we were but savages in caves
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[10:58] <WB8ELK> Yep...flew a very large Magellan GPS receiver...weighed 2 pounds. It was their first model.
[10:58] <craag> No chance of floating that across the atlantic then!
[10:59] <WB8ELK> Yes...my own design. Using thin PC boards manufactured by Hackvana.
[10:59] <WB8ELK> 0.6mm thick instead of the standard 1.6 mm boards usually produced.
[11:00] <edmoore> he gets around
[11:00] <fsphil> floating yes. in the air, maybe
[11:00] <craag> lol fsphil
[11:00] <edmoore> i wonder if the fleixble kapton/nomex/whatever-it-is flex pcbs would be lighter still
[11:00] <WB8ELK> This particular board is 3 grams heavy since I made a mistake when ordering and got a thicker board than I wanted.
[11:00] <edmoore> assuming they can still be produced to the tolerance required
[11:01] <WB8ELK> You can get 0.4mm thick boards from Hackvana ... I tried doing a flex board but too fragile.
[11:02] <WB8ELK> Wish I could fly along with this one but it would take several thousand Mylar balloons.
[11:03] <daey> WB8ELK: what was/is the goal of the flight?
[11:04] <edmoore> WB8ELK: what is the purpose of the DAC?
[11:09] <WB8ELK> Creates the sine wave audio for the APRS tones.
[11:10] <WB8ELK> Maybe I could fly this across the Atlantic....this was an event we did for a TV show....66 weather balloons carried the pilot to 14,000 feet all day: http://imgur.com/IMkHLzn
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[11:11] <WB8ELK> The goal was to cross the Atlantic Ocean with a Mylar party balloon...the ultimate goal is to get one around the World.
[11:11] <edmoore> does that get mixed somewhere? or does it pull a crystal around (or...)?
[11:12] <WB8ELK> Leo M0XER got one halfway round the balloon and send a custom balloon around the World nearly 10 times.
[11:12] <WB8ELK> Andy VK3YT has sent a Mylar balloon around the World in the Southern Hemisphere from Australia.
[11:13] <WB8ELK> Meant to type halfway around the World with a Mylar party balloon.
[11:13] <WB8ELK> The DAC audio drives the control voltage to the VCXO reference to my RF synthesizer
[11:14] <WB8ELK> which FM modulates it
[11:14] <WB8ELK> The DAC is a MAX5102A
[11:14] <R34lB0rg> PS-58 AOS was a much appreciated daily event recently
[11:15] <WB8ELK> I picked PS-58 up on WSPR and JT9 a lot. Going to do a WSPR flight next weekend here on 20 meters.
[11:15] <edmoore> that's what i guessed - 6 pin xtal package (suggesting VC) and lack of a mixer as far as i could see
[11:17] <WB8ELK> Thanks all...we will see just how far it goes...looks like I'm about to visit Italy. Heading back to bed here...wee hours of the morning.
[11:18] <edmoore> a good excuse for a holiday
[11:18] <edmoore> lost property collection
[11:18] <edmoore> good night
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[11:22] <WB8ELK> My girlfriend Bev KK4RPQ just suggested we should chase it. I think she prefers the chase vehicle to be a cruise boat on the Mediterranean.
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[11:25] <fsphil> mmmm
[11:29] <SpacenearUS> New position from 03SP6NVB-11 after 03a day silence - 12http://tracker.habhub.org/#!qm=All&q=SP6NVB-11
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[12:53] <SpacenearUS> New position from 03SP6NVB-12 after 032 days silence - 12http://tracker.habhub.org/#!qm=All&q=SP6NVB-12
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[13:18] <SpacenearUS> New position from 03SP6NVB-13 after 0310 days silence - 12http://tracker.habhub.org/#!qm=All&q=SP6NVB-13
[13:45] <AndyEsser> http://jobs.getstartedhq.com/getstarted-job-board/ideas/621019?utm_content=buffer04532&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer
[13:45] <AndyEsser> o0o a job that straddles a number of my interests/experience
[13:48] <edmoore> 'Understanding of Control theory' and 'Working knowledge of i2c' in the same list is amusing
[13:48] <edmoore> a bit like 'must be able to bring back the dead' and 'holds driving license'
[13:48] <AndyEsser> don't read the bottom line of Preferred :P
[13:50] <edmoore> too late
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[14:00] <Upu> hey edmoore we had someone who "held a driving license"
[14:01] <Upu> omitted to tell us he had 17 points on it
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[14:09] <fsphil> hah
[14:09] <fsphil> and someone elses
[14:12] <AndyEsser> Upu: errmm...
[14:12] <AndyEsser> I thought my 14 points was amusing :)
[14:12] <AndyEsser> but 17 takes the cake
[14:30] <gonzo___> isn't 12 a ban?
[14:32] <AndyEsser> yes
[14:32] <AndyEsser> I was involuntarily unable to drive for 6 months back in 2010 ;)
[14:35] <SpacenearUS> New vehicle on the map: 03VALKYRIE - 12http://tracker.habhub.org/#!qm=All&q=VALKYRIE
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[14:44] <SpacenearUS> New vehicle on the map: 03HERMES - 12http://tracker.habhub.org/#!qm=All&q=HERMES
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[15:29] <daey> edmoore: the second demand reads like: We are not willing to spend even an hour of training on you!
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[16:37] <edmoore> daey: yep
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[18:39] <Lunar_Lander> evening
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[19:58] <AndreaN> hello from the US
[19:59] <AndreaN> does any one know if it is possible to use the Pi in the Sky board in the US
[20:00] <SA6BSS-Mike> you can with the aprs board http://ava.upuaut.net/store/index.php?route=product/product&product_id=129
[20:01] <SA6BSS-Mike> if u are licensed
[20:01] <SA6BSS-Mike> as in have a ham cert
[20:02] <edmoore> and the 434mhz stuff too
[20:02] <edmoore> also needs a ham licesne
[20:03] <Upu> yes both need a HAM license over there
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[20:04] <SA6BSS-Mike> lora @ 868Mhz ?? should work license free?
[20:04] <edmoore> i don;t think it's capitalised
[20:04] <edmoore> it's not an acronym for anything
[20:05] <hosler> AndreaN: im gonna use one for my balloon
[20:05] <edmoore> and regardless most style guides recommend avoiding all-caps for sayable acronyms
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[20:05] <edmoore> like Nasa
[20:05] <AndreaN> Hello
[20:05] <edmoore> SA6BSS-Mike: 868 is not ism in the usa
[20:05] <Lunar_Lander> hello
[20:05] <AndreaN> Yes I'm a licensed HAm radio operator
[20:05] <SA6BSS-Mike> ah, ok
[20:05] <AndreaN> my call kc0lkv
[20:05] <edmoore> they have 902-818 or something
[20:05] <edmoore> 918*
[20:06] <AndreaN> Has any one use the Trackuino board?
[20:06] <edmoore> but i believe lora modules are available. but we don;t really want to push lora for hab too much
[20:06] <edmoore> we = me
[20:06] <SA6BSS-Mike> rtty for life :)
[20:06] <edmoore> patent-free stuff for hab would be more accurate but yes
[20:07] <Upu> AndreaN: no but I developed the Habduino which is like that but with the GPS module attached
[20:08] <AndreaN> I'll be right back..work calls..
[20:09] <hosler> Upu: Habduino got a website?
[20:09] <Upu> yup www.habduino.org
[20:09] <Upu> https://store.uputronics.com/index.php?route=product/product&path=62&product_id=57
[20:10] <hosler> Upu: ive been doing embedded stuff for years, but this is my first HAB project. would you recommend your board to me?
[20:11] <hosler> it way cheaper than the pi in the sky
[20:11] <edmoore> if you've been doing embedded for years, diy
[20:11] <Upu> no
[20:11] <Upu> I'd recommend you make your own
[20:11] <edmoore> diy flight computers is the modal thing here
[20:11] <Upu> from the components
[20:11] <Upu> Habduino/Pits are there for schools really
[20:12] <hosler> i might also mention that im looking for a quick and dirty experience. not really looking to invest a lot of days into this unless i find out i really like it
[20:12] <Upu> https://ukhas.org.uk/guides:linkingarduinotontx2
[20:12] <Upu> invest some time it will be infinitely more rewarding
[20:13] <Upu> if you don't want too I'm happy to take your money
[20:13] <hosler> ok
[20:13] <Upu> but the more you understand it the more likely your outcome will be sucessful
[20:13] <Lunar_Lander> electronics is worth it to learn it
[20:13] <Upu> this isn't something you can just rush through really
[20:13] <hosler> i mean after looking at this radiometrix driver code it looks easy enough
[20:13] <hosler> lol
[20:13] <edmoore> well you can if you know embedded fairly well
[20:14] <edmoore> for an EE it's a day's work probably
[20:14] <hosler> what is the bare minimum for success? radiometrix and what else?
[20:14] <edmoore> gps receiver, micro to attach them
[20:14] <Upu> understand what you're doing :)
[20:14] <Upu> but radio and GPS
[20:14] <hosler> Upu: i cant say that i do yet. only been looking into this for a couple days
[20:14] <Upu> and a micro to link them together
[20:15] <Upu> and a camera in the box
[20:15] <hosler> i have pi and arduino uno. also i have a bunch of pic24 laying around
[20:16] <edmoore> gps talks over a serial connection to the micro, the micro generates a suitably modulated base band for the radio, and you receive it on the ground
[20:16] <edmoore> optionally you get the micro to do other whizzbangs
[20:16] <edmoore> logging additional sensors, firing cutdown mechanisms if you need to, etc
[20:18] <hosler> yeah i have a bascket full of sensors
[20:18] <hosler> what gps do yall recommend
[20:18] <hosler> i guess ill keep it easy and use my arduino uno
[20:19] <edmoore> ublox max8
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[20:20] <hosler> wow thats beefy
[20:20] <edmoore> it's a fairly small pcb. 10mm x 10mm very approximately
[20:21] <hosler> i mean in price
[20:21] <hosler> also im horrible with surface mount soldering
[20:21] <hosler> dont have much practice, but i guess i can fix that
[20:21] <edmoore> it's $15
[20:21] <edmoore> it's easy be brvae
[20:21] <edmoore> brave*
[20:21] <edmoore> patience, thin solder
[20:21] <edmoore> a flux pen
[20:22] <Lunar_Lander> exactly
[20:22] <Lunar_Lander> SMD is a quite nice experience
[20:22] <hosler> edmoore: what site has it at 15
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[20:23] <edmoore> you want to talk to upu
[20:23] <edmoore> if he hasn't pm'd you already
[20:23] <hosler> ok
[20:24] <hosler> thanks
[20:24] <Upu> no discount on the modules sorry
[20:24] <Upu> they are already at the 200 unit price break
[20:24] <Upu> bbl
[20:24] <edmoore> linky tho
[20:25] <hosler> ok i found one https://store.uputronics.com/index.php?route=product/product&path=60_64&product_id=71
[20:26] <edmoore> that's the one
[20:29] <Lunar_Lander> I soldered on one of these quite recently
[20:29] <Lunar_Lander> it is really not hard
[20:31] <Upu> sorry on phone yes that site :)
[20:31] <Upu> ublox actually posted a video on how to solder it
[20:32] <edmoore> with an iron
[20:32] <edmoore> i reckon
[20:32] <Upu> https://www.youtube.com/watch?v=XGtVaVNw-J0&list=PLSzSoRUA4EXv_aK8Vma3YNrtMx22zndi_
[20:32] <Upu> despite they won't want to sell them as unattached modules
[20:32] <Upu> don't
[20:33] <Lunar_Lander> cool!
[20:33] <Lunar_Lander> btw I wanted to say I am always happy to be here :)
[20:35] <edmoore> right.
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[20:47] <hosler> how often do balloon payloads get lost?
[20:48] <edmoore> not very - mostly thanks to the predictor and radio tracking
[20:48] <edmoore> the predictor gives you an idea where it will come down
[20:49] <edmoore> this helps avoid sea landings - a problem in the uk - a lets you set off in a car quickly to be close, where you can have a greater opportunity to be clse when it comes down
[20:49] <edmoore> radio tracking means you here from it through the whole flight. in the very early days it might have just been a gsm modem sending an sms. you let go and hope to get an sms back containing a gps location a few hrs later
[20:49] <edmoore> no idea where it is likely to be
[20:50] <kc2pit> So you'll be able to track it right to the top of the giant tree it lands in.
[20:50] <edmoore> and quite vulnerable to not have gsm reception when right on the ground
[20:50] <kc2pit> Getting it out of that tree is an extra bit of adventure.
[20:52] <edmoore> jcoxon: do you have a link to that pic of your payload saved from loss by getting tanged?
[20:52] <edmoore> you know the one i mean
[20:52] <edmoore> tangled*
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[20:59] <jcoxon> edmoore, let me go digging
[21:01] <jcoxon> edmoore, https://www.flickr.com/photos/jcoxon77/4383328360/in/album-72157623226106480/
[21:02] <SpacenearUS> New position from 03SP9UOB-11 after 0315 hours silence - 12http://tracker.habhub.org/#!qm=All&q=SP9UOB-11
[21:03] <jcoxon> ooo korea
[21:03] <edmoore> hosler: ^
[21:03] <edmoore> sometimes you get lucky
[21:05] <Lunar_Lander> I came onto the channel the day that balloon flew
[21:05] <Lunar_Lander> great memories
[21:05] <jcoxon> good old days
[21:07] <fsphil> that was around the time I joined too
[21:07] <Lunar_Lander> and then it took three years for me to fly :)
[21:07] <hosler> so ARP modules will triangulate the balloon, right?
[21:08] <hosler> and you need that because GPS doesnt work at super high altitudes, correct?
[21:08] <edmoore> no
[21:08] <edmoore> and no
[21:08] <hosler> oook haha
[21:08] <edmoore> aprs is just telemetry
[21:08] <edmoore> gps is the only location means you have
[21:08] <Ian_> APRS will report the GPS fix. Use of specific GPS rx is recomended because not all have a flight mode and work above 12km
[21:09] <hosler> ok so why would i use a APRs module if i already have radiometrix module?
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[21:09] <SP9UOB-Tom> evening !
[21:09] <SP9UOB-Tom> :-)
[21:09] <Lunar_Lander> aprs is another network
[21:09] <Lunar_Lander> like a different thing
[21:10] <Lunar_Lander> many more listeners I'd say
[21:10] <Lunar_Lander> hi tom :)
[21:10] <hosler> so will the radiometrix not be sending data?
[21:10] <hosler> or whatever
[21:11] <Lunar_Lander> it can send data too
[21:11] <Lunar_Lander> some flights are multi-frequency
[21:12] <Lunar_Lander> but in the UK you can't do APRS on a balloon (as far as I know)
[21:12] <hosler> so would APRs be considered redundant?
[21:12] <edmoore> no
[21:12] <edmoore> you're confusing types i think
[21:12] <hosler> dang i really have no idea what im talking about
[21:12] <hosler> edmoore: yeah
[21:12] <edmoore> aprs is the english language
[21:12] <edmoore> a radiometrix module is a megaphone
[21:13] <edmoore> you can choose to speak english or french or danish or some clicky language into a megaphone if you choose
[21:13] <hosler> ohh
[21:13] <hosler> so APRs module is needed if i want to use some special protocol
[21:13] <hosler> that makes my life easier in some way
[21:14] <edmoore> aprs is an entire infrastructure that takes messages constructed in a specific way that have been broadcast by *something that can transmit on the right frequency with the right modules - eg some of the radio modules radiometrix sells* and is received by a network of always-on radio receivers that often plug into the internet to upload messages that they've
[21:14] <edmoore> received
[21:14] <hosler> oh neat
[21:14] <SP9UOB-Tom> Approaching Japan ! :-)
[21:14] <edmoore> aprs is like gsm is in cellphone land
[21:15] <hosler> so i dont really need APRs
[21:15] <fsphil> APRS is quite useful in the US as the infrastructure is already quite well established
[21:15] <edmoore> APRS is a 4-letter acronym
[21:15] <edmoore> automatic packet reporting system
[21:15] <hosler> ok
[21:15] <hosler> APRS*
[21:16] <edmoore> and yes there is a network of rceivers already in the US
[21:16] <hosler> so if i just plan on tracking my balloon with my sdr then i dont really need APRS module
[21:16] <edmoore> so people often fly their balloons using aprs as the downlink because that way they get a lot of receiver infrastructure for free
[21:16] <edmoore> that's correct yes
[21:16] <edmoore> but you can also decide to use aprs anyway and use your sdr to receive it too
[21:16] <hosler> besides the infrastructure being already there, is there any other benefit. such as live video or pictures?
[21:16] <edmoore> that way you have a backup plan if your sdr fails
[21:17] <edmoore> no
[21:17] <Lunar_Lander> may I interject a question that just crossed my mind?
[21:17] <edmoore> aprs is unsuitable for that
[21:17] <edmoore> no Lunar_Lander
[21:17] <edmoore> you may not
[21:17] <Lunar_Lander> ok
[21:17] <edmoore> Lunar_Lander: in irc you never ask to ask
[21:17] <edmoore> you just ask
[21:17] <edmoore> so ask
[21:17] <edmoore> ;)
[21:18] <Lunar_Lander> I recall someone did a system that activated its APRS after leaving the UK (on a pico I think)
[21:18] <edmoore> quite a few have done that
[21:18] <edmoore> well, a number
[21:18] <Lunar_Lander> now if someone in the US launches a balloon for instance and it is bound to cross the UK, would it be obliged to shut the APRS off?
[21:19] <edmoore> yes
[21:19] <Lunar_Lander> ah
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[21:21] <Vaizki> unless it was an "America f**k yeah!" model balloon
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[21:21] <Vaizki> bringing over democrazy and feifdom of Drumpf
[21:22] <Lunar_Lander> :D
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[21:22] <Lunar_Lander> that reminds me, I'll travel to Vienna next month and it will have a HAB element
[21:23] <Lunar_Lander> on the EGU conference I hope to meet the reading university team
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[21:45] <hosler> so how long does the average balloon project stay up in the air?
[21:48] <fsphil> a few hours
[21:49] <fsphil> for a typical latex balloon flight
[21:51] <Lunar_Lander> our last flight was just over 2 h
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[21:58] <R34lB0rg> and then there are floaters which can stay in the air for days or weeks
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[22:01] <hosler> wow
[22:01] <hosler> yeah i have some cheapo latex balloons
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[22:26] <SpacenearUS> New position from 03KD9DBI-11 after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=KD9DBI-11
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[22:36] <amell> cant decide if this is a joke https://github.com/ch11ng/exwm - why on earth would anyone do that
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[23:12] <R34lB0rg> amell, I've been asking myself that very question many times
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[23:12] <R34lB0rg> for example http://www.pugo.org/main/project_pshttpd/
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[23:58] <Ian_> Vaizki: no therapy ;) SQL not Quel with Ingres. I found it to be friendlier than Oracle, but badly marketed.
[00:00] --- Thu Mar 3 2016