highaltitude.log.20160325

[00:00] <Ian_> #1 criteria, must not manage to crush vehicles at launch time . . .
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[02:02] <SpacenearUS> New vehicle on the map: 03CADICA - 12http://tracker.habhub.org/#!qm=All&q=CADICA
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[07:05] <SpacenearUS> New vehicle on the map: 03ljbki_chase - 12http://tracker.habhub.org/#!qm=All&q=ljbki_chase
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[07:25] <SpacenearUS> New vehicle on the map: 03o rahman_chase - 12http://tracker.habhub.org/#!qm=All&q=o%20rahman_chase
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[09:01] <SpacenearUS> New position from 03hkLo1 after 033 days silence - 12http://tracker.habhub.org/#!qm=All&q=hkLo1
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[09:15] <hkLO> #habitat
[09:16] <fsphil> you may mean #habhub
[09:20] <hkLO> tahnks ;o)
[09:20] <hkLO> #habhub
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[10:53] <SpacenearUS> New vehicle on the map: 03160000.0302.002_chase - 12http://tracker.habhub.org/#!qm=All&q=160000.0302.002_chase
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[11:19] <SpacenearUS> New position from 03Legionowo after 0310 hours silence - 12http://tracker.habhub.org/#!qm=All&q=Legionowo
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[11:39] <SpacenearUS> New position from 03SP6NVB-11 after 03a day silence - 12http://tracker.habhub.org/#!qm=All&q=SP6NVB-11
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[13:09] Nick change: BitEvil -> SpeedEvil
[13:22] Nick change: DL7AD1 -> DL7AD
[13:22] <DL7AD> morning
[13:22] <DL7AD> fsphil: ping
[13:26] <SM0ULC-Reb> time zone offst today? ;)
[13:29] <DL7AD> SM0ULC-Reb: the time already changed somewhere?
[13:30] <fsphil> early tomorrow morning here
[13:31] <fsphil> there is no 2am
[13:31] <fsphil> hiya DL7AD
[13:31] <DL7AD> fsphil: we plan to launch the ssdv ballon tomorrow
[13:32] <DL7AD> ssdv(aprs)+ssdv(rtty)
[13:34] <DL7AD> we've fixed all errors now
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[13:37] <fsphil> nice
[13:37] <fsphil> how you doing the aprs?
[13:37] <DL7AD> just base64
[13:37] <DL7AD> there's nothing special
[13:38] <DL7AD> you could also call it "simple first test"
[13:38] <DL7AD> will be probably the first images of somewhere else than europe :P
[13:38] <DL7AD> well... i hope so
[13:39] <DL7AD> but the packets will the transmitted with a huge delay
[13:40] <DL7AD> we will do SSDV(RTTY) on 145.300MHz USB and SSDV(APRS) no the specific aprs region frequency. so it will change in china.
[13:41] <DL7AD> fsphil: look out for destination APECAN {{I packets
[13:41] <DL7AD> the packets will have a delay of 30 seconds
[13:41] <fsphil> are you pushing them to the ssdv server?
[13:42] <DL7AD> because one packet is 2 seconds long
[13:42] <DL7AD> yes thomas does. but i would be happy if you could write a script too because thomas internet connection sometimes break
[13:43] <fsphil> have you changed the packet size?
[13:43] <DL7AD> fsphil: i could send our perl script to your email address
[13:43] <DL7AD> no
[13:43] <DL7AD> its simply SSDV surrounded by APRS
[13:43] <fsphil> wasn't that too large?
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[13:44] <DL7AD> yes. too large to be decodeable for the TH-D72
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[13:44] <DL7AD> but direwolf decodes many packets
[13:44] <DL7AD> and i hope other igates will too
[13:44] <DL7AD> "hope".....
[13:46] <DL7AD> fsphil: but it would be better to implement something more sophisticated protocol next time
[13:51] <fsphil> hah
[13:51] Action: fsphil imagines lots of igates crashing shortly :)
[13:52] <DL7AD> fsphil: i will do the annoucement of the launch when we have everything assembled
[13:52] <DL7AD> :D
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[13:56] <DL7AD> fsphil: could we talk later about a new protocol?
[13:57] <DL7AD> fsphil: for AX.25
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[14:35] <fsphil> for AX.25 I'd just send binary data as-is now
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[14:54] <lz1dev> DL7AD> yes. too large to be decodeable for the TH-D72
[14:54] <lz1dev> i love aprs
[14:55] <DL7AD> fsphil: i mean aprs
[14:55] <DL7AD> lz1dev: :D
[14:55] <DL7AD> i will float into your direction hopefully lz1dev
[14:55] <DL7AD> im out
[14:55] <lz1dev> unfortunatelly im not in lz :)
[14:56] <lz1dev> think the line limit is about 250 bytes
[14:57] <lz1dev> i should have some ssdv code over aprs
[14:57] <lz1dev> somewhere
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[16:31] <SpacenearUS> New vehicle on the map: 03KM4RQN-11 - 12http://tracker.habhub.org/#!qm=All&q=KM4RQN-11
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[18:04] <Ian_> fsphil, the rest of us have decided to have no 2am on Sunday morning. The day after tomorrow :)
[18:07] <fsphil> pesky time travel
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[18:13] <Ian_> :) Just didn't want you to lose an hour two days on the trot
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[18:15] <DL7AD_> hi
[18:16] <DL7AD_> we (thomas kt5tk and i) will launch our ssdv floater tomorrow.
[18:16] <DL7AD_> ba3f61d91653a82a8d873cd0d64ce3a9
[18:16] <DL7AD_> prediction: http://predict.habhub.org/#!/uuid=76d114038fce69ee36f46eb404254c26b04df294
[18:17] <DL7AD_> it does APRS and SSDV (on APRS) 144.800MHz, and SSDV (RTTY)/telemtery on 145.300MHz
[18:18] <DL7AD_> the SSDV packets will be transmitted with a huge delay between the individual packets
[18:18] <DL7AD_> one telemetry/position cycle takes 3min
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[18:20] <DL7AD_> weight will be around 30g
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[18:20] <DL7AD_> it has a 2Wh LiPO battery which poweres the tracker at night.
[18:20] <DL7AD_> on day it will be charged by solar again
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[18:21] <DL7AD_> the tracker will stop SSDV transmission at night
[18:22] <DL7AD_> the SSDV will start as the battery reaches 3.7V and has solar voltage above 1.0V
[18:23] <DL7AD_> we will launch in berlin in the morning. there are clouds predicted in the early morning. but it should get clear at 9 UTC
[18:24] <DL7AD_> its the tracker which we wanted to launch 1 week ago. we've fixed all software and hardware errors now. the payload is already ready to be launched.
[18:27] <edmoore> payload pics?
[18:28] Action: Ian_ gets comfy seat and the popcorn
[18:29] <DL7AD_> edmoore: hold on
[18:33] <DL7AD_> edmoore: https://drive.google.com/file/d/0BwzVllHCGu5FM2ZwYzhtc2VTY00/view?usp=sharing thats the board which is going to fly tommorrow. solar cells are getting assembled right now.
[18:34] <DL7AD_> the SSDV over APRS and RTTY are compatible. its sent redundant. but only one ssdv-packet in sent every 30seconds. so one image will get transmitted around 45min
[18:35] <DL7AD_> we've written an script which exports the ssdv packets from aprs and feed them into habhub
[18:35] <DL7AD_> so we might get images from very remote locations
[18:36] <DL7AD_> but i will be aready happy, if it survives the first day :D
[18:38] <Laurenceb_> DL7AD, what is the expected float altitude?
[18:39] <DL7AD_> around 7000m. we will fly 2 or 3 stacked qualatex.
[18:39] <DL7AD_> 3 more likely
[18:40] <Laurenceb_> ah ok
[18:40] <Laurenceb_> I was going to say it looked heavy
[18:41] <DL7AD_> Laurenceb_: we already stacked them successfully https://kt5tk.wordpress.com/2015/08/10/double-pack-qualatex-floating-at-9200-m/
[18:41] <Laurenceb_> ah
[18:42] <DL7AD_> Laurenceb_: well a raspberry would be heavier :P
[18:46] <DL7AD_> the pcb does 12dBm btw
[19:04] <Laurenceb_> its very nice, I'm guessing low res B&W images?
[19:12] <DL7AD_> Laurenceb_: QVGA
[19:12] <DL7AD_> 1/80 sec
[19:13] <DL7AD_> i couldn't manage VGA because we dont have much memory available
[19:13] <DL7AD_> a raw QVGA barely fits in the STM32F4's memory
[19:13] <Laurenceb_> yeah, external memory eats power
[19:13] <DL7AD_> exactly
[19:14] <DL7AD_> Laurenceb_: but we are about to switch the camera. we are currently using the OV9655. but we can also use the OV2640 which can to JPEG encoding
[19:15] <DL7AD_> so we can do larger images in future
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[19:16] <DL7AD_> Laurenceb_: did you realize, we the STM32 is BGA? it has 200 pins below
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[20:27] <fsphil> there is a 5 minute timeout for images on the ssdv server, if no new packets are recieved in that time the next packet will start a new images
[20:28] <fsphil> if you see that happening let me know DL7AD_
[20:28] <fsphil> when you upload to habhub, can you include aprs in the receiver callsign. will be nice to see what packets are being received over the network
[20:49] <SA6BSS-Mike|2> sdr-console v3 beta is out http://sdr-radio.com/v3_preview_downloads
[20:50] Nick change: SA6BSS-Mike|2 -> SA6BSS-Mike
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[21:04] <DL7AD_> fsphil no thats not the case. teh delay is set to 30sec
[21:05] <DL7AD_> fsphil: the SSDV packet sent over RTTY is the same as the packet over APRS. so its sent twice.
[21:10] <lz1dev> hams wont like that
[21:10] <Ian_> (APRS Hams) :)
[21:11] <DL7AD_> At least we send packets without any path
[21:11] <lz1dev> WIDE-10-10
[21:15] <fsphil> hah
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[21:23] <DL7AD__> fsphil: here we go
[21:23] <DL7AD__> DL7AD => my computer home
[21:23] <DL7AD__> DL7AD_ thomas computer
[21:24] <DL7AD__> DL7AD__ my notebook
[21:26] <fsphil> <-- just me
[21:26] <Lunar_Lander> :D
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[21:34] <SP9UOB-Tom> evening all :-)
[21:34] <SP9UOB-Tom> i've just hacked Vaisala RS41 Radiosonde :-) https://www.youtube.com/watch?v=WwfPR5c3YUA
[21:35] <Vostok> SP9UOB-Tom: ha ha. i will have to show that video to people at work
[21:36] <SP9UOB-Tom> Vostok: and where are you working :) ?
[21:36] <Vostok> Vaisala ;)
[21:37] <SP9UOB-Tom> Vostok: cool :-)
[21:37] <fsphil> agents will be with you shortly
[21:37] <Vostok> not with sondes myself
[21:37] <SP9UOB-Tom> fsphil: with job offers ;-)
[21:37] <fsphil> that's great. what's the cpu?
[21:38] <SP9UOB-Tom> Vostok: and now the hard part comes, sensors data ;-)
[21:38] <SP9UOB-Tom> fsphil: stm32f100-ish
[21:39] <SP9UOB-Tom> Lots of RS41's are falling here - free trackers :-)
[21:39] <fsphil> the local sondes never seem to land here
[21:39] <fsphil> more chances in the summer months, will keep an eye out
[21:40] <Lunar_Lander> well done SP9UOB-Tom :)
[21:41] <Vostok> SP9UOB-Tom: too bad i can't give you any hints :P
[21:42] <Lunar_Lander> vaisala rocks!
[21:45] <SP9UOB-Tom> Vostok: ;-)
[21:45] <SP9UOB-Tom> Lunar_Lander: thanks :-)
[21:45] <Lunar_Lander> :)
[21:45] <Lunar_Lander> Vilho Väisälä was cool
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[21:51] <DL7AD__> SP9UOB-Tom: cool :D
[21:51] <DL7AD__> SP9UOB-Tom: did you modify the hardware or just the software?
[21:54] <SP9UOB-Tom> DL7AD__: no hardware modifications :-)
[21:54] <DL7AD__> SP9UOB-Tom: wow which type of microcontroller does it use?
[21:55] <SP9UOB-Tom> DL7AD__: STM32f10-something
[21:57] <SP9UOB-Tom> ok, time to sleep, i've just working on the firmware till 3:30 am today ;-)
[21:57] <SP9UOB-Tom> night all :-)
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[22:23] <DL7AD_> fsphil: would you like to have the perl script which igates the packets to habhub?
[22:24] <manterolat> Hi guys.
[22:24] <manterolat> I have a question regarding uploading packets to habhub.
[22:25] <manterolat> Should I simply send a POST message to /transition/payload_telemetry ?
[22:32] <mfa298> manterolat: I believe thats an old interface, you may be better talking to the couchdb there should be ome docs on http://habitat.readthedocs.org/en/latest/
[22:34] <daveake> Yes, one day I'll get round to changing my code over
[22:34] <manterolat> Yeah, I found it in the LoRa gateway code :P
[22:34] <manterolat> Thanks, I'll check it out mfa298
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[23:00] <fsphil> DL7AD_: sure
[23:00] <fsphil> been a loooong time since I've looked at perl code
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[23:03] <DL7AD_> http://pastebin.com/tcag3hXq
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[23:22] <lz1dev> fsphil: DL7AD_ you can write it in python :>
[23:22] <SpacenearUS> New position from 03SP6NVB-11 after 0311 hours silence - 12http://tracker.habhub.org/#!qm=All&q=SP6NVB-11
[23:23] <DL7AD__> lz1dev: yeah but thomas did it. it's not my fault :P
[23:23] <DL7AD__> :D
[23:24] <DL7AD__> lz1dev: are there libraries for the APRS-IS for python?
[23:25] <lz1dev> https://github.com/rossengeorgiev/aprs-python
[23:29] <SpacenearUS> New position from 03Legionowo after 0311 hours silence - 12http://tracker.habhub.org/#!qm=All&q=Legionowo
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[23:37] <DL7AD__> lz1dev: thanks
[23:38] <lz1dev> there is base91 too, but only for numbers
[23:38] <lz1dev> its fairly easy to encode text
[23:39] <DL7AD__> lz1dev: well we need to decode base64 , base91 is planned in the future
[23:40] <lz1dev> 21% overhead vs 33%
[23:40] <DL7AD__> and then i wanted fsphil to shorten the ssdv encoding to 256byte
[23:40] <DL7AD__> lz1dev: yep i know
[23:41] <DL7AD__> i also want to discard FEC and CRC, sync byte as well
[23:41] <DL7AD__> for the future
[23:42] <fsphil> you can get rid of all those now, as long as you put them back
[23:42] <DL7AD__> fsphil: yes sure
[23:43] <DL7AD__> fsphil: and then i need the packet to be 256byte over the whole information field
[23:44] <DL7AD__> but i wanna discuss this later :)
[23:44] <DL7AD__> i have all my concentration for tomorrow (today)
[23:44] <lz1dev> i once send an ssdv over aprs
[23:44] <lz1dev> http://static.rgp.io/2016-03-25_3sp1on7rxr.png
[23:45] <DL7AD__> lz1dev: did you fly it?
[23:45] <lz1dev> no
[23:45] <DL7AD__> or just testing
[23:45] <DL7AD__> ah
[23:45] <lz1dev> just went over the air
[23:49] <lz1dev> fsphil: i'll be happy to add code to the aprs gateway to handle ssdv
[23:50] <fsphil> that would be cool. just need to settle on the least hacky way to send it
[23:51] <lz1dev> strip the extra stuff, base91, send
[23:51] <lz1dev> not sure how igates handle invalid packet type
[23:51] <lz1dev> that would save us 2 bytes
[23:52] <lz1dev> although, its probably best to have a magic
[23:53] <fsphil> it's a shame the igates don't just work at the ax.25 level
[23:57] <lz1dev> ax25 has crc right?
[23:58] <lz1dev> i don't remember doing crc when i made my tracker
[00:00] --- Sat Mar 26 2016