highaltitude.log.20160404

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[00:06] <DL7AD> fsphil Ian_ magnification :D
[00:11] <Ian_> It's good to see cleverer people than I doing stuff that some of us can only aspire to :)
[00:11] <DL7AD> :)
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[00:58] <hosler> can anyone tell me why my boefeng has a band selection for uhf and vhf but i can be in a 2m band frequency but still in uhf mode
[00:58] <hosler> i dont get it
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[04:42] <SpacenearUS> New vehicle on the map: 03Ford fusion_chase - 12http://tracker.habhub.org/#!qm=All&q=Ford%20fusion_chase
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[05:10] <SpacenearUS> New position from 03SP9UOB-11 after 0312 hours silence - 12http://tracker.habhub.org/#!qm=All&q=SP9UOB-11
[05:41] <SA6BSS-Mike> hosler: http://support.baofengradio.us/article/90-dual-watch-dual-reception
[05:45] <x-f> DL7AD1, pong
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[06:57] <SM0ULC-Reb> morning!
[06:59] <SA6BSS-Mike> gm
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[07:20] <fsphil> mooorn
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[09:05] <SpeedEvil> http://imgur.com/gallery/Xrra2
[09:05] <SpeedEvil> (may be shopped)
[09:11] <SA6BSS-Mike> thats a nice pic
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[09:22] <Ian_> Can anyone tell me why hosler's query comes up here and on #habhub too - must be 3rd harmonic . . .
[09:23] <Ian_> Hosler The Vhf signal is received on UHF because of the close proximity and the UHF rig is tuned to 3 x the VHF frequency.
[09:23] <fsphil> he wrote it to both
[09:24] <fsphil> crossposting in IRC. tsk tsk :)
[09:24] <Ian_> Thanks a bunch fsphil. I ho[pe you are joshing me . . . I too like the easy questions :p
[09:24] <Ian_> I thought that it was a bit ironic given the answer!
[09:25] <Ian_> You seem to be doing some sterling work with DL7AD just now. Sounds good.
[09:25] <fsphil> they're doing all the fun stuff
[09:26] <Ian_> Which depends upon some of your back end magic with the infrastructure by the sound of it.
[09:27] <fsphil> it is finally a great use for aprs
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[09:29] <Ian_> Ha :) that will doubtless annoy the aprs camp somewhat. Particularly if they don't decode the data they are carrying
[09:30] <Ian_> Laters, Taunton tomorrow. Some prep to do.
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[09:41] <daveake> It's an interesting use of APRS, and with the potential to annoy APRS folk. Dummy whammy :-)
[09:42] <fsphil> only a few packets a minute, should keep everyone happy
[09:42] <fsphil> well probably not everyone. someone will take issue with it
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[09:59] <SM0ULC-Reb> :)
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[10:22] <SpacenearUS> New vehicle on the map: 03car_chase - 12http://tracker.habhub.org/#!qm=All&q=car_chase
[10:34] <DL7AD1> morning fsphil daveake Ian_
[10:34] Nick change: DL7AD1 -> DL7AD
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[10:36] <DL7AD> Ian_: i thought other people will complain about transmitting images but nobody even note something about using 1/10th of the bandwidth
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[10:50] <gonzo_> someone will always be complaining
[10:50] <gonzo_> if they didn't have anything to complain about.... they'd complain
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[11:02] <Matt_PrjHet> Hey daveake
[11:02] <daveake> hey
[11:03] <Matt_PrjHet> Is there a way to get the ssdv images on the PiTS to take the GPS clock info?
[11:03] <Matt_PrjHet> Mine keeps taking onboard clock time.
[11:05] <daveake> The system time is automagically set from GPS time, once it gets a lock
[11:06] <daveake> That was added to the code a few months ago
[11:07] <daveake> So, when you fire up the payload for flight (so it doesn't have an internet connection to get the time from), the first image or 2 will have the wrong timestamp; once it gets a lock then they'll be correct
[11:07] <Matt_PrjHet> Maybe there's a trick to doing it on the day... It usually creates a new folder once it gets the lock doesn't it? But that folder is usually created as soon as it boots which is often before the GPS lock.
[11:07] <daveake> yeah but it'll fix itself as soon as it gets a lock
[11:08] <Matt_PrjHet> Mine sequentially adds the images with the old date and time.
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[11:08] <Matt_PrjHet> It doesn't make a new folder.
[11:08] <daveake> It does
[11:08] <daveake> Latest(ish) code ?
[11:09] <daveake> I've flown this a few times and it works fine
[11:09] <Matt_PrjHet> No. Code is probably a year out of date. Is it something you've fixed in the last year?
[11:09] <daveake> 12:06 PM <daveake> That was added to the code a few months ago
[11:10] <daveake> Not a fix as such, more an extra ability :)
[11:10] <Matt_PrjHet> Cool, I'll upgrade. You rock Dave :D
[11:11] <Matt_PrjHet> Looking forward to the text overlays of altitude too!
[11:11] <daveake> Yeah, one day I'll push all this new stuff
[11:11] <Matt_PrjHet> Are there 'release notes' on the site somewhere with what else you've done in the last year?
[11:14] <daveake> readme file
[11:15] <daveake> I make no claims for accuracy :/
[11:15] <Matt_PrjHet> Ah, found em. https://github.com/PiInTheSky/pits
[11:18] <Matt_PrjHet> What's "Ability to run emulated flight from GPS NMEA file"?
[11:21] <Matt_PrjHet> ...and "Startup radio message with IP address etc" is that in the opening boot? (It disappears too quickly if you've got the Monitor output set to N!))
[11:23] <daveake> First one is that you can fake the GPS data by using an NMEA GPS log file
[11:24] <daveake> Second one sends out the IP address and SD free storage size over RTTY after startup. You can control how many times it does that
[11:25] <daveake> Re monitor, just leave it on. It only saves 20mA which is hardly worth it if you have 4 AAs
[11:28] <Matt_PrjHet> Fair enough. The batteries last for aaaaaaaages. Actually what sent me down this road was we forgot to depower the little beastie after we landed. So I had 1/4 shots from the flight followed by 3/4 shots of motorway streetlamps as it sat in the boot of Phil's car on the way home.
[11:28] <AndyEsser> lol
[11:30] <Matt_PrjHet> A load of the images were out of sequential order. I think it might've been either from the landing impact or from the card filling up and the TOC getting confused.
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[11:36] <daveake> Sounds like it rebooted so started from 1 again. Current software just uses the date to choose a folder, and timestamp to name the file.
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[11:53] <SpacenearUS> New vehicle on the map: 03VE2WMG-11 - 12http://tracker.habhub.org/#!qm=All&q=VE2WMG-11
[11:54] <Matt_PrjHet> It did land with a bump! Did you see the footage?
[11:55] <Matt_PrjHet> https://www.youtube.com/watch?v=MGirnf3TlGQ
[11:55] <Matt_PrjHet> You'll be pleased to know we're retiring the Romford Flyer. We're going to make something much lighter and with less pointy bits hopefully.
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[12:31] <SpacenearUS> New vehicle on the map: 03ASTROPI - 12http://tracker.habhub.org/#!qm=All&q=ASTROPI
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[15:01] <SpacenearUS> New vehicle on the map: 03K4TLH-11 - 12http://tracker.habhub.org/#!qm=All&q=K4TLH-11
[15:09] <daey> does anyone here can recommend a cheap and quickish pcb service?
[15:12] <craag> dirtypcbs/hackvana are my two gotos
[15:12] <craag> you'll have to pay extra for shipping to get quickish though
[15:13] <daey> craag: well quickish means <2weeks for me
[15:13] <craag> hackvana will certainly do that with DHL shipping
[15:14] <craag> dirtypcbs maybe, depending on their load
[15:14] <daey> isnt dirtypcbs in china?
[15:14] <craag> they both are :)
[15:14] <daey> damn
[15:14] <fsphil> you won't get cheap outside china
[15:15] <AndyEsser> daey: what's wrong with China?
[15:15] <daey> nah i dont mind china. just amazed that they can react that quickly
[15:15] <craag> I've jsut got boards shipped from hackvana in <72 hours though
[15:15] <craag> just shipping
[15:15] <craag> <7 days total
[15:15] <fsphil> impressive
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[15:16] <craag> daey: Have a chat in #hackvana
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[15:16] <craag> Mitch, who runs it, is in there as 'hackvana'
[15:16] <R34lB0rg> cool
[15:16] <craag> Always happy to answer Qs
[15:17] <daey> craag: now that you mention it, i know the channel
[15:17] <craag> :)
[15:17] <daey> well first i have to finish my design
[15:27] <SpacenearUS> New vehicle on the map: 03KD0PAW-1 - 12http://tracker.habhub.org/#!qm=All&q=KD0PAW-1
[15:27] <SpacenearUS> New vehicle on the map: 03KD0PAW-2 - 12http://tracker.habhub.org/#!qm=All&q=KD0PAW-2
[15:35] <Ian_> #hackvana
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[16:09] <DL7AD> .hysplit SP9UOB-11
[16:09] <SpacenearUS> 03DL7AD: HYSPLIT for 03SP9UOB-11 - 12http://spacenear.us/tracker/hysplit_cache/160404-10_12243_SP9UOB11.gif
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[16:28] <SM0ULC-Reb> DL7AD: when do you plan next flight with ssdv-aprs?
[16:33] <SpacenearUS> New position from 03PS-63 after 0311 hours silence - 12http://tracker.habhub.org/#!qm=All&q=PS-63
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[17:30] <DL7AD> SM0ULC-Reb: no idea. we still have one 2 trackers available from the 7a revision. i think we are not going to launch our reference tracker. so there's one left with the newer OV2640 camera. unfortunately i need craag's help to implement this camera because the JPEG-mode works somehow a bit different. and if possible to want to implement 9k6 transmissions. and then i have to fix some errors: PLL-adjustment-DMA-interference, position cycle bu
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[17:53] <SM0ULC-Reb> DL7AD: ah, thought you had something soon flying when i saw the pics on the ssdv-server
[17:54] <SM0ULC-Reb> DL7AD: what modulation for 9k6?
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[18:36] <sirus> Hey does the tracker support APRS? payloads? I'm using a MT-1000 APRS pinger (in the US) so all my stuff comes out of the APRS network (144.390Mhz / aprs.fi)
[18:38] <mfa298> the tracker doesn't do aprs directly, but pulls in data from aprs.fi - so if you're getting onto aprs.fi and it looks like a balloon it should appear on the habhub map
[18:44] <sirus> Hrm didn't seem to propogate from aprs.fi http://aprs.fi/#!mt=roadmap&z=13&call=a%2FK7SDV&timerange=3600&tail=3600
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[18:49] <mfa298> it might be that it wont get imported into the habhub map until it's over a certain altitude
[18:49] <mfa298> .help
[18:49] <SpacenearUS> 03mfa298: Here you go: 12https://ukhas.org.uk/spacenearus_irc_bot
[18:51] <mikestir> any of you guys got any gstreamer experience, specifically with the rtp client (probably looking at fsphil)?
[18:51] <mfa298> .aprs info K7SDV
[18:51] <SpacenearUS> 03mfa298: 03K7SDV was near 03King County, WA, USA 10(47.58875,-122.31525) at 0393 meters about 0320 minutes ago - 12http://aprs.fi/info/K7SDV
[18:51] <SpacenearUS> 03mfa298: Path: 03K7SDV>T7SUSR via 03WIDE2-1,qAR,W7HR-1
[18:51] <SpacenearUS> 03mfa298: Symbol: 03/O Speed: 030kmph Course: 03264° MicE message: 03M2: In Service
[18:51] <SpacenearUS> 03mfa298: Comment: 03'|3
[18:51] <SpacenearUS> 03mfa298: Status: 03MT-Omega v1.45
[18:51] <SpacenearUS> 03mfa298: Telemetry: 03Ch1 1088 03Ch2 10331 03Ch3 100 03Ch4 100 03Ch5 100
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[18:54] <mfa298> sirus: looks a bit like it knows something about your balloon, but it might not auto import until it's "in flight" (based on the help link above), lz1dev can probably confirm what the actual parameters are for in flight
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[19:11] <lz1dev> mfa298: it doesn't pull data from aprs.fi, and the minimum altitude 2000m
[19:18] <mfa298> sirus: ^^ there's at least part of the answer, it would need to be over 2000m to auto-import
[19:25] <DL7AD> SM0ULC-Reb: 2GFSK is used for 9k6 APRS. we transmitted the images by AFSK 1k2 APRS and SSDV 600baud on the last flight.
[19:30] <DL7AD> does anybody know who did the SDR presentation on the UKHAS conference in 2014?
[19:33] <mfa298> DL7AD: https://ukhas.org.uk/general:ukhasconference2014#timetable
[19:33] <SM0ULC-Reb> DL7AD: right, thought you had something else in the works :)
[19:33] <mfa298> I'd assume you mean "STM32+DSP - Adam, Matt / Jon (wiki page DSP code)"
[19:34] <DL7AD> mfa298: well.... i need someone who has a bit knowledge about how to demodulate 2GFSK with an SDR in a diagram.
[19:34] <DL7AD> because i want to know, how well the modulation of my transmitter is
[19:35] <DL7AD> or in other word, find out, if i set it up correctly
[19:35] <DL7AD> SM0ULC-Reb: anything else?
[19:35] <mfa298> my experience so far suggests that good sdr documentatino is a bit sparse
[19:36] <DL7AD> :(
[19:36] <mfa298> there was a more specific sdr thing (with video) in 2015 https://ukhas.org.uk/general:ukhasconference2015#talks
[19:37] <mfa298> I don't think I've watched that one yet though
[19:37] <DL7AD> mfa298: i have been on the conference and i cant remember ^^
[19:38] <DL7AD> ah..... remembering....
[19:38] <DL7AD> :P
[19:38] <sirus> mfa298: lz1dev thanks for the info!
[19:39] <SM0ULC-Reb> DL7AD: didn't think of aprs right away. cool with 9.6 :)
[19:39] <DL7AD> yeah but i'm still struggling with it
[19:40] <DL7AD> i dont know if i've done anything wrong with the scrambling or modulation (settings) with the Si4464 or probably both
[19:40] <DL7AD> so i want to check if i could get something like this: <hold on>
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[19:42] <DL7AD> http://www.zimagez.com/full/123be653402e5291817defaa1cf6b7542f629a91ddcf80c56924c0fb25bf0a9d3eaa42d46c7d08f6ff7e47a6c236fe000834a589b6ab6d18.php (left screen)
[19:42] <DL7AD> so i could check if the bits arrive (demoulated) correctly
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[19:47] <SpeedEvil> http://imgur.com/MYOJj6T - as hard landings are a common topic here
[19:48] <SpeedEvil> And yes, that is a quad with the blades fully penetrating a wooden fence
[19:48] <SpeedEvil> Well - substantially, not fully
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[20:33] <R34lB0rg> scratched paint
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[20:36] <daveake> Could be worse ... https://youtu.be/6Viwwetf0gU
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[20:40] <dbrooke> killed by a balloon 8-)
[20:44] <daveake> :)
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[21:33] <fsphil> mikestir: don't sorry. gstreamer is a complicated beastie, I avoid if possible
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[21:42] <fsphil> how far did you get with the ov2640?
[21:42] <fsphil> DL7AD: ^
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[22:41] <DL7AD> fsphil: pong
[22:41] <fsphil> ello
[22:41] <DL7AD> hi phil :)
[22:41] <DL7AD> currently i did nothing with the OV2640
[22:41] <DL7AD> but 9k6 APRS
[22:41] <fsphil> ah ha
[22:42] <DL7AD> but no idea why its not working
[22:42] <fsphil> are there many (or any) 9600 igates in the area?
[22:42] <DL7AD> no :P
[22:42] <DL7AD> but i assume some hams will set up igates if they know there's a balloon doing 9k6
[22:42] <fsphil> true
[22:42] <DL7AD> and 9k6 is an awesome speed
[22:43] <DL7AD> (for habbing)
[22:43] <DL7AD> it sounds like 9k6
[22:43] <DL7AD> but cant get any decode
[22:44] <DL7AD> fsphil: do you know the Si chip settings for GFSK?
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[22:46] <fsphil> nope. which chip do you have?
[22:46] <DL7AD> i think its the Si4464
[22:46] <DL7AD> but the Si4060 is software compatible to it
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[22:48] <fsphil> looks like it's just a setting in modem_mod_type
[22:48] <fsphil> type 3
[22:49] <DL7AD> fsphil: you can also set the oversampling and NCO data rate for GFSK.
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[22:52] <fsphil> the buffer is a bit small for an imaginag packet
[22:54] <DL7AD> i got it
[22:54] <fsphil> ah you can just keep writing to the fifo when it starts to empty
[22:55] <DL7AD> yeah....
[22:55] <DL7AD> but i actually wanted to get it to work first :P
[22:55] <DL7AD> but i just got it working :D
[22:55] <fsphil> nice. what changed?
[22:56] <DL7AD> 9k6 doesnt require NRZ-I encoding
[22:56] <DL7AD> but i trusted an document which said NRZ-I encode is required for 1k2 and 9k6
[22:57] <DL7AD> but thats incorrect
[22:57] <DL7AD> NRZ-I encode = change tone when bit = 0. no change when bit = 1
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[22:59] <DL7AD> great :D
[23:04] <DL7AD> fsphil: thats crazy
[23:05] <DL7AD> 2...3 packets per second
[23:06] <fsphil> yeah I really need to get working on the server side speed problem :)
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[23:09] <fsphil> are you still base encoding it?
[23:09] <DL7AD> base91
[23:12] <DL7AD> fsphil: ha :D
[23:13] <DL7AD> http://ssdv.habhub.org/
[23:13] <DL7AD> still some error loss
[23:14] <fsphil> heh, image in 30 seconds
[23:14] <fsphil> always the first packet missing
[23:16] <DL7AD> strage
[23:18] <DL7AD> wonderful signal
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[23:19] <DL7AD> fsphil: as you can see on the spectrum analyzer
[23:21] <fsphil> receiver might be missing the start. may need a longer preamble when first tx'ing
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[23:23] <DL7AD> fsphil: no i think it's too fast in the beginning. software error on my side.
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[23:32] <SpacenearUS> New vehicle on the map: 03Legionowo - 12http://tracker.habhub.org/#!qm=All&q=Legionowo
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[23:37] <SpacenearUS> New position from 03SP6NVB-11 after 03a day silence - 12http://tracker.habhub.org/#!qm=All&q=SP6NVB-11
[23:38] <Ian_> The frame rate is certainly impressive.
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[23:43] <DL7AD> Ian_: true :P
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[00:00] --- Tue Apr 5 2016