highaltitude.log.20200422

[00:24] <SpacenearUS> New position from 03PS-74 after 0316 hours silence - 12https://tracker.habhub.org/#!qm=All&q=PS-74
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[04:11] <SpacenearUS> New position from 03U4B-6 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=U4B-6
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[06:06] <SpacenearUS> New position from 03U4B-2 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=U4B-2
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[06:34] <SpacenearUS> New vehicle on the map: 03BSS25 - 12https://tracker.habhub.org/#!qm=All&q=BSS25
[06:59] <fsphil> Darkside: my auto_rx issue wasn't DNS, turned out to be a bad PSU
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[07:01] <fsphil> it would start to decode, get only a few packets then the rtlsdr reset
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[07:32] <SpacenearUS> New vehicle on the map: 03NASD01 - 12https://tracker.habhub.org/#!qm=All&q=NASD01
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[08:08] <Darkside> fsphil: that guy on twitter asking about your RS library is intending ot use it on a smallsat btw...
[08:10] <Darkside> not 100% sure he knows what hes doing
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[08:16] <Darkside> surely theres better FEC options than RS
[08:17] <fsphil> these days, definitely
[08:17] <Darkside> might want to suggest that on twitter...
[08:18] <Darkside> theres a good LDPC library written by agg
[08:19] <Darkside> which implements all the CCSDS codes, which can be decoded in gnuradio already
[08:28] <agg> Darkside: do you know if anyone has actually decided one of my ldpc codewords in gr?
[08:28] <Darkside> lol nope
[08:28] <Darkside> though there is overlap in the implemented codewords
[08:29] <Darkside> ""
[08:29] <Darkside> "Secondly, standard ssdv standard requires rscoding."
[08:29] <Darkside> uhh
[08:33] <Darkside> fsphil: how much decode performance did the RS encoding give?
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[08:33] <Darkside> because fldigi isnt ideal for this stuff, given its acting like an erasure channel (i think?)
[08:33] <Darkside> basically if the SNR goes bad you dont get bits at all
[08:33] <Darkside> or you get more bits, or whatever
[08:34] <Darkside> it screws up badly, regardless
[08:34] <fsphil> there's some very hacky code to work around lost rtty frames
[08:38] <fsphil> I never did a proper test of the rs encoding in fldigi, it just worked well enough
[08:42] <Darkside> ahh
[08:42] <Darkside> yeah i figured as much :P
[08:42] <Darkside> im too used to work with david rowe now
[08:42] <Darkside> test all the things
[08:46] <fsphil> the height of my testing was running a recording of a flight through fldigi and counting the packets decoded
[08:49] <fsphil> how would you test against quick fading like you'd get on a hab? apply variable noise / gain?
[08:50] <Darkside> yeah david has a fading channel simulator
[08:51] <Darkside> you'd also want to be applying interleaving at that point too
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[10:01] <SM0ULC-David> what is "standard ssdv standard" ?
[10:02] <craag> sssdvs
[10:04] <Darkside> SM0ULC-David: he means the 'default' mode of SSDV, which has some RS FEC bytes at the end
[10:04] <Darkside> but you can turn it off
[10:04] <SM0ULC-David> ah, right, was googling a bit
[10:04] <Darkside> though yes, standard standard, provided by the department of redundancy department
[10:06] Action: SM0ULC-David currently verifying UECP-implementation for a RDS-encoder. Lost in the sea of FEC...
[10:08] <SM0ULC-David> Anyone doing SSDV over shortwave these days?
[10:08] <fsphil> it was probably a mistake to include the FEC as part of the packet
[10:15] <Darkside> SM0ULC-David: on HF theres modes like easypal which are probably better suited
[10:15] <Darkside> as in, the modem is better suited for HF, being OFDM
[10:17] <fsphil> I found it takes forever to sync, and lost it at the slightest bit of noise
[10:17] <fsphil> though that was a long time ago
[10:18] <fsphil> same issue with DRM radio, which I think easypal uses?
[10:18] <Darkside> interesting
[10:18] <Darkside> yeah easypal is a cut down version of DRM
[10:18] <Darkside> there's also the MFSK image mode in fldigi
[10:18] <Darkside> which im not really sure is actually MFSK
[10:18] <fsphil> I think that's analogue
[10:18] <Darkside> yeah
[10:20] <fsphil> I did try rtty/ssdv over HF once, it got decoded in denmark
[10:22] <daveake> Something is rtty in the state of Denmark
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[11:30] Nick change: BitEvil -> SpeedEvil
[12:12] <SpacenearUS> New vehicle on the map: 03Dl6zg_chase - 12https://tracker.habhub.org/#!qm=All&q=Dl6zg_chase
[12:28] DK6OV (~DK6OV@2a02:560:42f7:9b00:d591:2fed:e215:271a) joined #highaltitude.
[12:30] <DK6OV> Hi! I think I can receive BSS25 on 144,600 MHz. How can the Signal be decoded?
[12:34] <PE2BZ> Does it sound like RTTY ?
[12:35] <PE2BZ> 100 bd 7n2 450 shift about but I am making assumptions ;-)
[12:36] <DK6OV> The signal seems to have more then 2 frequencies.
[12:38] <DK6OV> BSS25 can now bee seen in dl-fldigi with the Information chan 11. But I don't know what that is standing for.
[12:38] <PE2BZ> Can you show a screenshot of how the signal looks ?
[12:39] <PE2BZ> chan 11 I guess is the wspr ID channel number
[12:39] <DK6OV> ok, little moment please.
[12:40] <DK6OV> no, that is a very short signal.
[12:40] <PE2BZ> does it look like a bunch of dots ?
[12:45] <DK6OV> Ben, I send you an email with a screen-shot.
[12:50] <PE2BZ> Does not look familiair to me Dieter, sorry. It looks a tiny bit like PSK31 to me ?
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[12:54] <DK6OV> may be. Let's wait if it is getting stronger. BSS25 seems come in my direction.
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[15:41] <SA6BSS-Mike> PE2BZ: BSS25 is a wspr board
[15:41] <SA6BSS-Mike> 20m
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[16:36] Nick change: stilldavid_ -> stilldavid
[16:51] <PE2BZ> Thanks Mike, I will inform DK6OV by email.
[16:57] <PE2BZ> SA6BSS-Mike, what´s your antenna lenght ? Starting cutdown ;-)
[16:58] <SA6BSS-Mike> 5.10 x 2
[16:59] <SA6BSS-Mike> 300/1409600 x 0,96
[17:01] <PE2BZ> Thanks :-)
[17:04] <SA6BSS-Mike> looks like -24 is transmitting from ground in Canada
[17:04] <SA6BSS-Mike> :)
[17:05] <SA6BSS-Mike> where it landed last night
[17:18] <daveake> Is it in quarantine ?
[17:19] <SA6BSS-Mike> hehe, yep, will be there for at least two weeks :)
[17:29] <PE2BZ> Canada ? I thought west China ?
[17:38] <SA6BSS-Mike> no, its the other wspr board, landed last night
[17:38] <SA6BSS-Mike> BSS24
[17:38] <SA6BSS-Mike> -7 should come in over USA tomorrow night or Friday afternoon
[17:39] <SpacenearUS> New vehicle on the map: 03SP3QDX-7 - 12https://tracker.habhub.org/#!qm=All&q=SP3QDX-7
[17:42] <PE2BZ> aha
[17:42] <PE2BZ> So, all but one wspr tracker are grounded ;-)
[17:48] <SA6BSS-Mike> only fly one at the time
[17:48] <SA6BSS-Mike> as I only have one call
[17:49] <SA6BSS-Mike> aprs flight I can use -7 -8 sa6bbs-12 and so on
[17:49] <SA6BSS-Mike> I can cheet and use my other calls sa7bss sa5bss and so on
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[19:49] <SpacenearUS> New position from 03PS-76 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=PS-76
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[20:11] <SpacenearUS> New vehicle on the map: 03PH1M-RTTY - 12https://tracker.habhub.org/#!qm=All&q=PH1M-RTTY
[20:12] <SpacenearUS> New vehicle on the map: 03PH1M-4FSK - 12https://tracker.habhub.org/#!qm=All&q=PH1M-4FSK
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[21:04] <SpacenearUS> New position from 03PS-74 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=PS-74
[21:07] <SpacenearUS> New vehicle on the map: 03PiHAT - 12https://tracker.habhub.org/#!qm=All&q=PiHAT
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[23:55] <SpacenearUS> New position from 03U4B-2 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=U4B-2
[00:00] --- Thu Apr 23 2020