highaltitude.log.20200429

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[02:16] <SpacenearUS> New vehicle on the map: 0319GSN006 GALAXY S10 ROBERT_chase - 12https://tracker.habhub.org/#!qm=All&q=19GSN006%20GALAXY%20S10%20ROBERT_chase
[02:47] DL7AD (~sven@2001:16b8:5c1b:5000:e543:945b:5999:375f) left irc: Ping timeout: 244 seconds
[02:56] <snaked> Alright, let me just bullshit together tomorrow's schedule...
[02:59] <snaked> Oh, I'm sorry, I had the wrong tab highlighted.
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[05:14] <OZ1SKY_Brian> gm
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[06:43] <SpacenearUS> New position from 03W8MV-11 after 0313 hours silence - 12https://tracker.habhub.org/#!qm=All&q=W8MV-11
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[07:44] <SpacenearUS> New position from 03NASD01 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=NASD01
[08:03] <SpacenearUS> New position from 03cayennelpp1 after 038 hours silence - 12https://tracker.habhub.org/#!qm=All&q=cayennelpp1
[08:54] <SpacenearUS> New position from 03DL7AD after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=DL7AD
[08:54] <craag> DL7AD: Recceived via Eshail-2 geo satellite :D
[09:07] <SpacenearUS> New vehicle on the map: 03M0KVI_chase - 12https://tracker.habhub.org/#!qm=All&q=M0KVI_chase
[09:19] <OZ1SKY_Brian> craag what?
[09:20] <OZ1SKY_Brian> ballon with qo100 uplink or joke?
[09:21] <craag> prototype balloon tracker with qo100 uplink
[09:21] <craag> by DL7AD
[09:22] <OZ1SKY_Brian> oh thats really cool
[09:24] <OZ1SKY_Brian> rtty or ?
[09:27] <craag> Olivia 2/125 at the moment, he's still trying things out though.
[09:27] <fsphil> lol, madness
[09:27] <fsphil> DL7AD: sorry I missed your messages yesterday
[09:29] <OZ1SKY_Brian> what freq, ill have a look?
[09:31] <craag> It's off now, as he's got to work.
[09:31] <OZ1SKY_Brian> ahh ok
[09:32] <craag> It turns out my tcxo-modded LNB is less stable in intermittent sunlight than I'd hoped :/
[09:33] <OZ1SKY_Brian> i havent modded my lnb yet, just use the tracking in sdr console
[09:40] <OZ1SKY_Brian> oh danish chatter on .695, thats rare i hear that
[09:41] <fsphil> craag: tinfoil ! :)
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[10:39] <Lahti> qfacone small portable 1680MHz sonde antenna lahti design http://skanneri.info/foorumi/viewtopic.php?f=4&t=203
[10:41] <Darkside> hopefully 1680 MHz sondes will go away soon
[10:41] <Darkside> the US is getting rid of them
[10:47] Processman (5b9be697@91-155-230-151.elisa-laajakaista.fi) joined #highaltitude.
[11:02] <Pit[m]> https://www.u-blox.com/en/product/zed-f9p-module
[11:02] <Pit[m]> New model
[11:03] <Pit[m]> Centimeters accuracy. Sounds awesome.
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[11:07] <SM0ULC-David> Pit[m]: you have an rtk-app in mind?
[11:13] <Darkside> i've ordered a few of them for a work job
[11:13] <Darkside> using them to get precise position reporting off a drone platform
[11:23] <SM0ULC-David> cool
[11:24] <SM0ULC-David> probably awesome for landing
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[11:32] <Darkside> its more just so we get an accurate record ofr where the drone went, not so much for controlling it
[11:32] <Darkside> takeoffs / landings are manually controlled
[11:33] <Darkside> we dont care so much that the drone follows a precise path, as much as we care about knowing precisely where it *did* go for our application
[11:53] <SpacenearUS> New position from 03PS-76 after 033 days silence - 12https://tracker.habhub.org/#!qm=All&q=PS-76
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[12:21] <SM0ULC-David> Darkside: right, a lot of possible applications. :)
[12:24] <Darkside> yeah
[12:24] <Darkside> but yeah, you really need 2 of them to get good accuracy without external corrections
[12:24] <Darkside> and you need to know the location of the reference station to very good accuracy if you want good accuracy on the rover station
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[12:39] <SpacenearUS> New position from 03PS-74 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=PS-74
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[13:28] <SM0ULC-David> Darkside: mm, i thought it was another of their chipsets with built-in rtk-link on 430 mhz
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[14:07] <SpacenearUS> New position from 03SOLAR-WL after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=SOLAR-WL
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[14:40] <SpacenearUS> New position from 03U4B-6 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=U4B-6
[15:17] <SpacenearUS> New vehicle on the map: 03SP3RAT_chase - 12https://tracker.habhub.org/#!qm=All&q=SP3RAT_chase
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[17:07] <craag> OZ1SKY_Brian: 10489605.66 center
[17:08] <craag> err dial sorry
[17:08] <SpacenearUS> New position from 03DL7AD after 038 hours silence - 12https://tracker.habhub.org/#!qm=All&q=DL7AD
[17:10] <OZ1SKY_Brian> just started cooking, let me check quick
[17:11] <OZ1SKY_Brian> some broken cw?
[17:12] <craag> ~1khz up
[17:12] <craag> 1350hz center at 10489605.66 dial
[17:12] <craag> it's 1 minute on, 1 minute off
[17:13] <OZ1SKY_Brian> might be something there, vy weak
[17:13] <craag> yes, but decodable :)
[17:13] <craag> olivia 2/125
[17:15] <OZ1SKY_Brian> sri gotta keep an eye on the cooking
[17:15] <craag> no worries am running recordings here for sven.
[17:32] <PE2BZ> OZ1SKY_Brian, if the eggs break and little chicken come out the water was not hot enough ;-)
[17:41] <DL7AD> good evening.
[17:42] <DL7AD> fsphil: that's okay. agg helped me :)
[17:45] <agg> we haven't used a hotfix filter in habitat in like 9 years!
[17:45] <agg> amazingly i could still find my signing certificate and remember the passphrase and it all worked
[17:48] <DL7AD> agg: Yes the hotfix ist very cool. maybe we can encode the data binary :P
[17:48] <agg> hah
[17:48] <agg> really we want a binary parser for habitat for that, not a hotfix, that would be kind of a horror
[17:48] <DL7AD> The Olivia 2/125 messages take very long and I would be happy if I could reduce it even more.
[17:48] <agg> i guess it could work though...
[17:48] <agg> you'd have to use ASCII-coded-binary for it to work with fldigi though
[17:49] <agg> and contestia needs ascii anyway?
[17:49] <agg> olivia
[17:49] <DL7AD> Olivia is ASCII only anyway
[17:49] <DL7AD> 7bit. Contestia is 8 bit
[17:49] <agg> in principle you could transmit $$CALLSIGN,SENTENCE_ID,BINARY_BLOB_HERE*CHECKSUM and decode the binary blob into whatever you wanted
[17:49] <DL7AD> But I chose olivia because contestia's Eb/N0 is higher.
[17:50] <agg> using a hotfix or even just we could write a generic post-processing filter you could call
[17:50] <agg> a bit of a weird hybrid
[17:50] <agg> I guess you could base64 encode the data
[17:50] <DL7AD> better is DL7AD$$VERY_SHORT_CALL,SENTENCE_ID,BINARY_BLOB_HERE*CHECKSUM
[17:51] <DL7AD> I will be afk for 5min picking up dinner.
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[17:56] <SpacenearUS> New position from 03BSS25 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS25
[18:01] <DL7AD> agg: back
[18:02] <DL7AD> agg: I want to send you another filter later which includes 8 char locators, because for the car 6 chars locators are pretty big
[18:03] <agg> ok
[18:07] <OZ1SKY_Brian> PE2BZ no chiken bonus today :-)
[18:07] <SpacenearUS> New vehicle on the map: 03BZ-LORA-5 - 12https://tracker.habhub.org/#!qm=All&q=BZ-LORA-5
[18:10] <SpacenearUS> New vehicle on the map: 03BZ-RTTY-5 - 12https://tracker.habhub.org/#!qm=All&q=BZ-RTTY-5
[18:23] <OZ1SKY_Brian> craag is it still there?
[18:26] <OZ1SKY_Brian> DL7AD are you still transmitting?
[18:26] <DL7AD> OZ1SKY_Brian: no
[18:26] <OZ1SKY_Brian> ok thanks
[18:26] <DL7AD> Problem is, that I have no window into the right direction.
[18:26] <OZ1SKY_Brian> ah ok i see the problem
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[20:28] <SpacenearUS> New vehicle on the map: 03U4B-7 - 12https://tracker.habhub.org/#!qm=All&q=U4B-7
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[21:03] <SpacenearUS> New vehicle on the map: 03Magnu_Chase - 12https://tracker.habhub.org/#!qm=All&q=Magnu_Chase
[21:26] <DL7AD> agg: are you still here?
[21:29] <agg> yes
[21:40] <DL7AD> agg: working on the hotfix at the moment.
[21:51] <DL7AD> agg: https://pastebin.com/RMPa2YCq
[21:57] <agg> DL7AD: http://dpaste.com/35K9RE2
[21:59] <DL7AD> 6383d5295eb5104f3e73ac0a6c9ab29b
[22:01] <DL7AD> agg: thx. as you can see, I'm living on the train track. :D
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[22:02] <agg> it's very exciting, i am so happy to see all that hotfix stuff finally working lol
[22:02] <agg> we spent a lot of time in 2011 designing a system to cope with all the errors people regularly had
[22:02] <agg> but in the end we made a system where people tested stuff before flying and there was suddenly almost no need for any of the filters
[22:03] <DL7AD> agg: yes. that was the reason, I remembered the system :D
[22:03] <DL7AD> I also had been a culprit
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[22:07] <fsphil> how many characters are you looking to squeeze the coordinates into?
[22:08] <DL7AD> undetermined. I don't want the whole transmission to be longer than 15 seconds because I probably have to run at 250...500mW in the end.
[22:08] <DL7AD> @fsphil
[22:12] <fsphil> 6 characters base64 would be about worst case 0.15km accuracy
[22:12] <fsphil> if I've done my sums right
[22:14] <DL7AD> fsphil i can do base91
[22:15] <fsphil> that'll be about 0.05km accuracy at the equator with 6 digits
[22:15] <fsphil> 4.8km with 4 digits, which isn't great
[22:16] <DL7AD> I got 2,4km
[22:16] <fsphil> it would be 2.4km for latitude
[22:16] <DL7AD> this would actually be enough for a floater.
[22:16] <DL7AD> true
[22:20] <DL7AD> fsphil: well if we start something like that we could do the same for all numbers.
[22:21] <DL7AD> and the , is the wort which is transmitted :P
[22:21] <DL7AD> worst
[22:22] <DL7AD> aynway. I don't want to make it too complicated just yet.
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[22:40] <Darkside> DL7AD: you might be interested in a mode that david rowe and i are working on
[22:40] <Darkside> https://github.com/drowe67/codec2/pull/101
[22:40] <Darkside> very much in progress
[22:43] <DL7AD> Darkside: how do you get to such an Eb/N0? Do you use spreading?
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[23:39] <SpacenearUS> New vehicle on the map: 03D1 - 12https://tracker.habhub.org/#!qm=All&q=D1
[23:49] <DL7AD> Darkside, fsphil, agg, craag: I will tell you tomorrow (today) when I'm leaving with the tracker switched on. I will transmit on the same frequency 2400.106MHz +~1kHz. Olivia 2/125, Cycle 40 seconds. Call DL7AD. Habitat protocol call: D1. ~1.5W on a cloverleaf antenna.
[00:00] --- Thu Apr 30 2020