highaltitude.log.20190126

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[07:23] <SpacenearUS> New vehicle on the map: 03SP8PG_chase - 12https://tracker.habhub.org/#!qm=All&q=SP8PG_chase
[07:28] <SpacenearUS> New vehicle on the map: 03M0LVR_chase - 12https://tracker.habhub.org/#!qm=All&q=M0LVR_chase
[07:36] <SpacenearUS> New vehicle on the map: 03SQ5PGC_chase - 12https://tracker.habhub.org/#!qm=All&q=SQ5PGC_chase
[07:50] <SpacenearUS> New position from 03tracher4 after 0313 hours silence - 12https://tracker.habhub.org/#!qm=All&q=tracher4
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[08:09] <SpacenearUS> New vehicle on the map: 03SP3KSS_chase - 12https://tracker.habhub.org/#!qm=All&q=SP3KSS_chase
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[09:19] <SpacenearUS> New position from 03YAM-1 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=YAM-1
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[09:39] <SpacenearUS> New vehicle on the map: 03BAG04-12 - 12https://tracker.habhub.org/#!qm=All&q=BAG04-12
[09:39] <SpacenearUS> New position from 03YAM-2 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=YAM-2
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[10:42] <SpacenearUS> New position from 03ICSPACE2 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=ICSPACE2
[10:43] <Astrobiologist> testing testing, can anybody hear me? having trouble logging in to IRC
[10:44] <Viproz> Astrobiologist, yep
[10:44] <Astrobiologist> many thanks
[10:45] <Medad> yes
[10:45] <Medad> Do you hear our tracker? We are on the ground still
[10:45] <Astrobiologist> I am proceeding on foot alongside tottenham court road to a high vantage point
[10:45] <Astrobiologist> my Institute with glass frontage to the west - should work
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[10:46] <Astrobiologist> will listen out as I walk, you never know!
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[10:48] <Astrobiologist> s9 qrm on 434.6 where I am
[10:51] <Medad> Any idea why nothing is getting uploaded via fldigi
[10:51] <Medad> dlfldigi
[10:51] <Medad> i got only one string through
[10:51] <Medad> and it does not indicate at the bottom that a string has been successfully uploaded
[10:52] <Astrobiologist> a strange chirping signal on 434.6 which I also heard last night - unless that was you?
[10:55] <Medad> that will be me
[10:55] <Medad> there will be 10 pips before each transmission
[10:57] <Astrobiologist> but it was going chirp chirp chirp (indeed about ten times) and then a burst of static, the latter didn't sound like rtty at all. n.b. that was last night, although I heard it briefly just now too. could be unrelated qrm
[10:59] <SpacenearUS> New position from 03SP5YAM after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=SP5YAM
[11:00] <fsphil> on 433-434mhz, 99% of what you hear is unrelated :)
[11:00] <Astrobiologist> have you launched yet? there aren't any sentences getting into habitat which seems suspicious. usually when you are right next to the payload you get a rich haul of sentences
[11:01] <Medad> I am unable to upload any sentences
[11:01] <Medad> I am getting plenty of sucessful messages though
[11:01] <fsphil> upload, or receive?
[11:01] <Medad> we are still filling the balloon
[11:01] <Medad> I am receiving but not able to upload
[11:02] <Astrobiologist> fsphil indeed yes, but when I listened in on the launch at the ukhas conference the rtty was very clear and distinctive even a large distance away, by ear. it was the chirp chirp chirp bit that made me think I was hearing the payload yesterday
[11:02] <Medad> I have set the call sign in dlfldigi
[11:02] <fsphil> is the receive bar in dl-fldigi turning green?
[11:02] <Medad> yes
[11:02] <fsphil> and what is the callsign?
[11:02] <Medad> MRn
[11:03] <Medad> I got one through to the server a few minutes ago
[11:03] <Medad> call sign MRN
[11:03] <Medad> I got one through now
[11:04] <fsphil> I don't see it on the map
[11:04] <fsphil> !flights
[11:04] <SpacenearUS> 03fsphil: Current flights: 03ICSPACE2 10(ebe3), 03YAM-1&YAM-2 - Lowicz 10(1f16), 03SP5YAM - Lowicz 10(e0e4)
[11:05] <Astrobiologist> chirping again, very faint (outside Birkbeck)
[11:05] <Astrobiologist> two sentences on habitat
[11:06] <fsphil> I can only see the two yam flights
[11:07] <fsphil> and tracher4
[11:07] <fsphil> where you able to get it on the map before Medad? https://tracker.habhub.org/
[11:09] <SpacenearUS> New vehicle on the map: 03SP9UOJ_chase - 12https://tracker.habhub.org/#!qm=All&q=SP9UOJ_chase
[11:09] <Astrobiologist> I can see it on Matt's android tracker, a couple more sentences just now. suggests a problem with the habitat map itself on the website (since habitat itself is getting the sentences)
[11:09] <PE2BZ> 1 packet each minut appears on the tracker for ICSPACE2
[11:11] <Medad> yes now working
[11:11] <Medad> thank you
[11:12] <PE2BZ> What size balloon do you use ?
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[11:14] <Astrobiologist> do you have a ham radio with you Medad? if you did, and only when you have a spare moment, we could try a simplex call to see if we have line of sight between us
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[11:18] <Astrobiologist> continuous chirps now.... must be something else
[11:19] <fsphil> yep :)
[11:19] <Medad> 36" qualatex foil balloon
[11:19] <Astrobiologist> that's going to be annoying
[11:19] <Medad> We are now quite close to launching. We use a 1.5g net lift
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[11:22] <fsphil> too far for me sadly
[11:22] <fsphil> what kind of payload?
[11:23] <PE2BZ> fsphil https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FImperialSpaceSociety%2FPicoTracker&sa=D&sntz=1&usg=AFQjCNEh2gGpz9Yd6ECSwKuHNIZvLSvx-w
[11:24] <PE2BZ> this one, the other one seems quite long ? https://github.com/ImperialSpaceSociety/PicoTracker
[11:25] <fsphil> heh, google didn't want to make it easy
[11:27] <Astrobiologist> I am in my Institute now... qrm is actually quite low. of course maybe it is built like a giant Faraday cage.... we will see
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[11:36] <Astrobiologist> ok, I am staked out on the 10th floor in a reasonably low qrm area, up against a large glass window facing West. I can't hear any rtty on 434.6
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[11:38] <Astrobiologist> no I stand corrected!!!!!! 10 chirps then rtty! :-) faint. I will try to decode, but I have no GPS lock so I think the app won't upload
[11:39] <Medad> we have launched
[11:39] <Astrobiologist> congratulations, I can hear you
[11:39] <PE2BZ> Now it´s out of your hands ;-)
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[11:41] <Medad> anyone able to get transmissions?
[11:42] <Astrobiologist> much louder now
[11:42] <Medad> any decodes?
[11:43] <PE2BZ> 1,5 gram free lift would be 0.3 m/s so that might take a while to get enough altitude to get more receivers.
[11:44] <PE2BZ> At least for ¨us over here¨ in the Netherlands ;-)
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[11:45] <trickv> ooh i have rx
[11:45] <PE2BZ> you are at 248 m altitude now !
[11:45] <PE2BZ> trickv so it´s alive :-)
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[11:46] <Astrobiologist> very faint. I am having trouble getting the android app to decode
[11:49] <SpacenearUS> New position from 03KM4MRH-11 after 038 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KM4MRH-11
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[11:51] <fsphil> 0.1m/s :)
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[11:54] <trickv> i think only one clean decode for me...
[11:55] <fsphil> hopefully the ascent rate picks up a bit
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[11:57] <medad_> i think it landed
[11:58] <G8KNN> rock solid signal from ICSPACE2 in Cambridge
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[11:58] <G8KNN> but failing to decode
[11:59] <PC4L> can you guess his alt?
[11:59] <medad_> any location data?
[12:00] <Astrobiologist> according to the habhun display it was last at 248m and woundl
[12:00] <G4YHE> Good signal here but not decoding it.
[12:00] <G8KNN> the telemetry is corrupted differently every time. I would guess it must be 2km alt?
[12:00] <medad_> Maybe the baudrate would be 45.45
[12:00] <medad_> it sometimes works like that
[12:01] <medad_> At least in testing I have observed that
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[12:01] <G8KNN> ah OK. Will try
[12:02] <medad_> any success? we have not been able to pick up a strong signal here in london
[12:02] <medad_> could be our receiver hardware though
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[12:03] <G8KNN> There she goes. 45 baud it is!
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[12:05] <G8KNN> dial is 434.603
[12:05] <Astrobiologist> I can't hear it any more in my location but it might now be shielded by the rest of the building. I will try relocating
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[12:06] <medad_> wow 3 people decoded the message
[12:08] <SpacenearUS> New vehicle on the map: 03SP5YAM-b - 12https://tracker.habhub.org/#!qm=All&q=SP5YAM-b
[12:11] <medad_> looking good so far!
[12:12] <PA-Balloon> Even in Cailais (F5APQ) received the signal for a few moments
[12:13] <PA-Balloon> Is freq. still 434.603 MHz.?
[12:13] <medad_> We are now preparing the second balloon
[12:13] <medad_> ICSPACE3
[12:17] <medad_> I don't see ICSPACE3 announced on the side bar
[12:17] <medad_> of Habhub
[12:18] <G8KNN> PA-Balloon: yes, 434.603
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[12:21] <medad_> ICSPACE2 seems to be doing well! but flying very low
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[12:27] <Astrobiologist_> Hello
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[12:28] <SpacenearUS> New position from 03ICSPACE3 after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=ICSPACE3
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[12:28] <PA-Balloon> Tnx for freq. G8KNN
[12:29] <medad_> We are now preparing to launch the second balloon ICSPACE3
[12:29] <medad_> 434.250MHZ
[12:30] <medad_> It seems to work with baud rate of 45,45
[12:30] <Astrobiologist> OK I am standing by on 434.25
[12:30] <Astrobiologist_> Hello
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[12:31] <PA-Balloon> Tnx freq. 434.250 Mhz. ICSPACE3
[12:32] <Astrobiologist> I am having trouble with my IRC client so have logged in from another device
[12:32] <SpacenearUS> New vehicle on the map: 03DH2SE-12 - 12https://tracker.habhub.org/#!qm=All&q=DH2SE-12
[12:32] <Astrobiologist> hopefully I can catch ICSPACE3 as it crosses overhead my location
[12:33] <PE2BZ> I see traces of ICSPACE2 on my waterfall, on the other side of the North Sea :-)
[12:33] <PA-Balloon> Nice
[12:38] <medad_> still on the ground
[12:39] <medad_> for icspace3
[12:39] <PA-Balloon> tnx for info
[12:41] <medad_> few minutes
[12:42] <SpacenearUS> New vehicle on the map: 03M0LVR wasp_chase - 12https://tracker.habhub.org/#!qm=All&q=M0LVR%20wasp_chase
[12:44] <Astrobiologist_> I am not sure the android app can handle bands other than 50 and 300
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[12:46] <medad_> Looks like ICSPACE is transmitting at baudrate of45.45
[12:46] <medad_> going to launch in a minute
[12:48] <medad_> launched ICSPACE3
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[12:49] <PE2BZ> for all listeners ICSPACE2 is 45.45 baud !!
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[12:51] <medad_> ICSPACE3 launched!
[12:51] <medad_> from london
[12:51] <Astrobiologist_> Hello
[12:52] <medad_> hey!
[12:52] <medad_> 434.250MHZ
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[12:54] <medad_> anybody picking up ICSPACE3
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[12:56] <Astrobiologist_> I can hear ratty but not Dec decode
[12:56] <medad_> baudrate of 45.45
[12:56] <g8fjg> cant decoded trying 50/45/45.45
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[13:00] <g8fjg> $$$ICSPACE3,44,125924,+51.520935,-000.237876,15,00,3196,0008,+20*2F88 using 45.45 gps stuck?
[13:00] <medad_> looks like it
[13:01] <medad_> what baud rate are you using?
[13:01] <medad_> there seems to be a change in the gps coordinates now
[13:02] <PE2BZ> $$ICSPACE2,150,130108,+51.764703,+001.095158,4951,07,3206,0004,+11*2064
[13:02] <PE2BZ> 45.45 bd
[13:02] <PE2BZ> 50 bd does not decode
[13:03] <PE2BZ> And I notice one ¨uncommon¨ fact, the beeps are neither on the Mark nor the Space frequency
[13:07] <Viproz> https://imgur.com/a/rW3mhC1 I think this RS is trying to say something
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[13:18] <YO3ICT> Hello Guys. Just restarting HAB. I got my tracker up and running and dl-fldigi is actively decoding it and uploading the data but I'm not seeing it on the map. Any thoughts?
[13:19] <PA-Balloon> It has delay, just wait for some time
[13:20] <PE2BZ> YO3ICT did you view the parser logtail for any errors ?
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[13:21] <YO3ICT> PE2BZ How can I do that?
[13:21] <PE2BZ> habitat.habhub.org and parser logtail button
[13:22] <PE2BZ> notice the pause button :-)
[13:22] <YO3ICT> [2019-01-26 13:22:08,926] DEBUG habitat.parser MainThread: Selected payload_configuration e39397f4d6fcc748417d1e3b597eca7e for 'YO3ICT' [2019-01-26 13:22:08,851] INFO habitat.parser MainThread: Parsing [ascii] '$$YO3ICT,85,132152,44.48927,26.02799,78,200,1,38,26,98941,152,1b*8024\n' (9c0bee000d50df819a043017a5a47613c31aab324955b25b3a31c931c4d43f7e) from YO3ICT
[13:24] <YO3ICT> Does this ring any bells?
[13:24] <PE2BZ> Ding Dong ;-)
[13:25] <PE2BZ> I am looking for your callsign, just a moment
[13:26] <PE2BZ> YO3ICT <SpacenearUS> Payload config YO3ICT (ca7e)
[13:26] <PE2BZ> <SpacenearUS> Callsign(s): YO3ICT
[13:26] <PE2BZ> <SpacenearUS> Last parsed: 13 minutes ago, nofix
[13:27] <YO3ICT> It has the GPS fix.
[13:28] <PE2BZ> [2019-01-26 13:25:43,984] INFO habitat.parser MainThread: All attempts to parse failed
[13:28] <PE2BZ> [2019-01-26 13:25:43,983] DEBUG habitat.parser MainThread: CantExtractCallsign exception in simple_binary: CantExtractCallsign
[13:28] <PE2BZ> [2019-01-26 13:25:43,983] DEBUG habitat.parser MainThread: Exception in UKHAS main parse: ValueError: (field flags): invalid literal for int() with base 10: '1b'
[13:28] <PE2BZ> [2019-01-26 13:25:43,979] DEBUG habitat.parser MainThread: Selected payload_configuration e39397f4d6fcc748417d1e3b597eca7e for 'YO3ICT'
[13:29] <PE2BZ> What type of tracker ?
[13:30] <YO3ICT> SP9UOB pico
[13:30] <YO3ICT> $$$$YO3ICT,109,133016,44.48940,26.02807,77,204,0,35,26,98894,150,1b*925F
[13:31] <PE2BZ> Am I allowed to change your payload configuration ?
[13:32] <YO3ICT> Sure, go ahead.
[13:32] <PE2BZ> What frequency is your tracker on ?
[13:34] <PA-Balloon> Hearing telemetrie on 434.603 USB now in South East Holland (to weak to decode at this moment. But sign is getting stronger
[13:37] <PE2BZ> YO3ICT if I paste your string in the payload for telemetry I get this error: Checksum invalid or type unrecognised. Tried xor crc16-ccitt fletcher-16 fletcher-16-256
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[13:40] <Astrobiologist> hello
[13:40] <Astrobiologist_> Hello
[13:41] <PE2BZ> hello ?
[13:42] <Astrobiologist> hello to whom? I am having IRC probs and have tried to set up a new account
[13:42] <PE2BZ> Seems to be working :-)
[13:43] <YO3ICT> PE2BZ It is on 437.6 MHz
[13:44] <PE2BZ> YO3ICT there appear to be many $ at the start of the transmission, if I remove 2 and paste them in the payload I can complete the payload but on RX it fails with the same base 10 ID error, so I am out of options.
[13:44] <Astrobiologist> did you get a hello from Astrobiologist_ as well?
[13:45] <YO3ICT> It should be crc16-ccitt
[13:45] <PE2BZ> Yess
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[13:45] <PE2BZ> Hello from the _ and hello from the one without the _
[13:45] <YO3ICT> dl-fldigi is showing good checksums
[13:46] <YO3ICT> The actual sentence is with only 2 $
[13:46] <Astrobiologist> thanks so basically I have a backup account now for IRC
[13:46] <YO3ICT> $$YO3ICT,150,134543,44.48936,26.02791,95,206,1,210,26,98867,150,1b*8B0D
[13:46] <PE2BZ> Try yourself, delete the telemtry, paste the string from fldigi and view the error message
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[13:47] <PE2BZ> This one looks better ?
[13:47] <YO3ICT> Do not know how to do this, sir. Can you show me some steps?
[13:47] <PE2BZ> Did you change anything ?
[13:48] <YO3ICT> No. I get 2 $ in the greenbox in dl-fldigi. There are 4 $ in the decode box. I suspect that the one that is uploading is the one with only a couple of $.
[13:49] <PE2BZ> Wait a moment, just saved new payload doc
[13:49] <YO3ICT> PE2BZ Just sent you an invite on Skype.
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[13:51] <Ian_> 45.45 Baud infers ITA2 5 data bits. it was a US standard really, Europe settled at 50 Baud. End of history lesson.
[13:52] <Ian_> 45.45 was the US standard, . . . not ITA2, just for clarity.
[13:53] <PE2BZ> YO3ICT did not see one yet. But I guess I am not the best to help, it still gives [2019-01-26 13:51:44,639] DEBUG habitat.parser MainThread: Exception in UKHAS main parse: ValueError: (field flags): invalid literal for int() with base 10: '1b'
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[13:55] <YO3ICT> I see. The flags should not be integer, but string.
[13:56] <buzz53> YO3ICT it looks like your last parameter "1b" is hex but you've defined it as integer in the payload doc
[13:56] <YO3ICT> Any way to delete our attempts at creating the payload?
[13:56] <buzz53> There's probably a way to make it accept hex, but I think if you change it to string it will work OK
[13:57] <PE2BZ> I just changed that. Let´s see
[13:57] <SpacenearUS> New vehicle on the map: 03YO3ICT - 12https://tracker.habhub.org/#!qm=All&q=YO3ICT
[13:57] <PE2BZ> byzz53 you are the hero :-)
[13:57] <PE2BZ> buzz53 also ;-)
[13:57] <buzz53> I had a seriously mis-spent youth (a long time ago)
[13:59] <YO3ICT> Thank you! So now I see 5 payload with my callsign. Any possibility to delete de bad ones?
[14:00] <Astrobiologist> where is icspace3 at the moment?
[14:02] <PE2BZ> YO3ICT no. The lowest one is the one with the latest modification.
[14:03] <PE2BZ> Astrobilogist 805 m altitude around Finsbury Park
[14:04] <Astrobiologist> I should be able to hear it on 434.250, but I guess I am too low at street level and the qrm is too high. it seems to be moving slower than icspace2
[14:07] <g8fjg> Astrobiologist I suspect from the bearing I have its over Clacton
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[14:16] <YO3ICT> PE2BZ I do not know what I just did but seems like the upload is failing again. Just created another payload with the right settings for auto-configure.
[14:17] <PE2BZ> same name ?
[14:17] <YO3ICT> THis time, dl-fldigi is not explicitly saying that it uploads.
[14:17] <YO3ICT> So nothing in the parser log anyway.
[14:19] <PE2BZ> So it will not appear on the map also. Does fldigi show a received string ?
[14:19] <YO3ICT> Yes, green. Let me restart fldigi
[14:20] <YO3ICT> Btw, fldigi is constantly crashing on my machine.
[14:20] <Astrobiologist> g8fjg is icspace3 not updating its position correctly? I should be able to hear it if it was so close
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[14:22] <YO3ICT> Ok, restarting fldigi fixed the upload issue.
[14:22] <PE2BZ> [2019-01-26 14:21:55,575] DEBUG habitat.parser MainThread: No configuration doc for 'YO' found
[14:22] <PE2BZ> [2019-01-26 14:21:55,434] INFO habitat.parser MainThread: Parsing [ascii] '$$YO,44.48925,26.02785,88,214,1,222,25,98773,152,1b*252B\n' (51160b6ae82190c26c5053f439bc674dd3317a9ded93d1a9377b1b00102a9eb2) from YO3ICT
[14:23] <YO3ICT> That was a glitch in the fldigi decode.
[14:23] <PE2BZ> so it´s working now ?
[14:24] <YO3ICT> Yes.
[14:24] <g8fjg> Astrobiologist gps not working too well
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[14:38] <PB0AHX-Herman> Hello to all
[14:39] <Medad> Hello!
[14:42] <Astrobiologist> hello
[14:42] <Astrobiologist> g8fjg where do you think it is now? bit of a bug in the code, really
[14:44] <Medad> The GPS on ICSPACE3 seems to be stuck for good
[14:44] <g8fjg> out over north sea , I get nearly the same bearing for both flights
[14:44] <Medad> I think it now somewhere over the English Channel
[14:45] <Medad> ICSPACE2 has entered a nice float at 5700m altitude
[14:45] <Astrobiologist> how could it stick perhaps? I would have thought the GPS chip would just stop giving NMEA strings
[14:46] <Bozzy> Looks like ICSPACE2 is going to pass right over you PE2BZ
[14:47] <PE2BZ> Mt arms are way to short ;-)
[14:48] <SpacenearUS> New vehicle on the map: 03KD0HIP-7 - 12https://tracker.habhub.org/#!qm=All&q=KD0HIP-7
[14:51] <PE2BZ> On the airspy with 7 el yagi ICSPACE3 is indeed in RX range
[14:51] <PE2BZ> antenna direction 260 degrees
[14:52] <Bozzy> What rotor are you guys using?
[14:52] <PE2BZ> I am using a KR-400 if I am right ;-)
[14:53] <g8fjg> G5500
[14:54] <g8fjg> G1000 xc
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[14:55] <Medad> thanks PE2BZ, It is good to know that ICSPACE3 is still going across the English Channel
[14:55] <Bozzy> Hmm, certainly not cheap rotators
[14:57] <g8fjg> I've got some serious ali up there to turn!
[15:00] <PE2BZ> Mine has to turn a logper, a 7 el 70 cm yagi, a 2 m dipole and an X-5000 :-)
[15:00] <Bozzy> I need to get something installed when the weather gets better
[15:01] <PE2BZ> Bozzy Do you do satellites ?
[15:01] <Bozzy> yes, radio and TV
[15:01] <PE2BZ> lol
[15:02] <PE2BZ> No amateur satellites ?
[15:03] <Bozzy> Sometimes I do on vhf and uhf, also dabble with NOAA
[15:04] <PE2BZ> Medad on the waterfall, on my sdr at 27 m ASL, at the left the ICSPACE3 and at the right the ICSPACE2. 420 MHz colinear antenna with SDR dongle.
[15:05] <PE2BZ> Bozzy If I had to replace my rotor now, I would try to find an old Pan & Tilt motor and use it for Azimuth / Elevation
[15:10] <Medad> Thanks PE2BZ are you saying ICSPACE3 is to the north of ICSPACE2?
[15:10] <Medad> based on signal strength?
[15:11] <PE2BZ> The waterfall is on the omniderectional antenna, I would say the direction is stil about 260 degrees from herem so south west of ICSPACE2
[15:12] <Medad> Ok thank you
[15:12] <Medad> We need to find a way to track any radio beacon with crowd sourced signal strenght readings and triangulation
[15:13] <Medad> For runaway cases like ICSPACE3
[15:13] <g8fjg> ISPACE3 about 65 deg for me.. I've just lost 2
[15:14] <PE2BZ> ICSPACE2 bursted ?
[15:15] <Medad> Irratic movements from ICSPACE2
[15:15] <PE2BZ> https://imgur.com/a/42mdkXn
[15:16] <PE2BZ> That´s on the yagi both flights
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[15:16] <PE2BZ> Medad Pfewwwww
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[15:17] <Astrobiologist> Medad I had wondered if you could do coarse inertial navigation using an IMU chip
[15:18] <Medad> I have done intertial navigation with the IMU with my android phone and in a few seconds it reported I was a few kilometers away
[15:18] <PE2BZ> $$$$ICSPACE2,225,141930,+52.024407,+002.783243,5766,08,3206,0004,+03*1BAD How about the 1BAD at the end ;-)
[15:19] <Astrobiologist> was that on the underground in London?
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[15:19] <Medad> Yes
[15:19] <SA6BSS-Mike> PE2BZ: :)
[15:20] <Medad> The problem with using an IMU is there is noise. And when you integrate it twice, you end up with a huge deviation
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[15:20] <SpeedEvil> Triple integration really blows up those errors.
[15:20] <g8fjg> PE2BZ yes you are :-)
[15:21] <g8fjg> afk
[15:22] <PE2BZ> DOn´t run away Ron !
[15:22] <Astrobiologist> Medad we discussed this on the train back from ukhas :-)
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[15:22] <Medad> Yes I remember!
[15:23] <Medad> ICSPACE2 is still stable. There was a slight hiccup a few minutes ago
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[15:24] <Astrobiologist> what happens if you only measure it once a second or something? wouldn't the noise average out?
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[15:30] <Medad> @Astrobiologist. If you take less frequent samples, you do not know what happens inbetween those samples. Averaging out the samples will introduce deviations from the actual orientation that the imu is experiencing. And Double integrating that will also cause large drift
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[15:31] <PE2BZ> What is the imu in this story ?
[15:31] Nick change: William -> Guest15987
[15:32] Nick change: Guest15987 -> Will89L
[15:32] <Medad> I have a feeling that the ICSPACE2 GPS is struggling with the cold temperatures, hence the sudden deviations. The temperature is now -7 degrees centigrade in the Silabs radio chip die
[15:33] <PE2BZ> If I did read right, the GPS had a backup battery on board ?
[15:33] <Will89L> Medad, is the configuration in your ICSPACE3 the same?
[15:34] <Medad> ICSPACE3 configuration is same as ICSPACE2 except for the transmit frequency
[15:34] <Medad> However, the baud rate seems to not be 50 baud but 45.45 ICSPACE3
[15:35] <PE2BZ> I would say 45 baud for both payloads ! ICSPACE2 does not decode over here at 50 baud
[15:35] <Medad> @PE2BZ the GPS has a super cap for doing a warm start. Thats all
[15:35] <Will89L> ICSPACE2 GPS is struggling with the cold temperatures but ICSPACE3 GPS launched from the same place with the same configuration is NOT struggling with the cold temperatures, where is the logic?
[15:36] <Medad> ICSPACE3 GPS is dead. Locked for some time
[15:36] <PE2BZ> Ok, is that working at -60 degrees ? I have had 2 flights with uncovered GPS modules with coldstart coincell, but they short when they get -50 degrees and that´s why our GPS failed during flight but returned after burst.
[15:38] <Medad> No nowwhere near -60 degrees. It is -7 degrees
[15:38] <PE2BZ> The radiochip is.
[15:38] <PE2BZ> But that is powered, and heating when transmitting. You have a cover around the payload ?
[15:39] <Astrobiologist> just to say ICSpace 2 and 3 are awesome
[15:40] <Astrobiologist> but good to engage in some constructive picking apart for ICSpace 4 :-)
[15:40] <Astrobiologist> these payloads have given me ideas for my own
[15:41] <PE2BZ> ICSPACE2 is much better floating as ours which went to Danmark at 1500 m altitude.
[15:41] <Medad> https://imgur.com/a/pzfa4u8
[15:41] <Medad> This is a photo of the tracker
[15:41] <Astrobiologist> gutted that I couldn't rx them myself, I think they went overhead too quickly for me
[15:42] <Astrobiologist> which is something to bear in mind for low altitude floaters I guess(some people's stations are on hills?)
[15:42] <PE2BZ> tnx Medad. Indeed that would not go down to -60 degrees inside. Batteries would heat the space.
[15:42] <Medad> I completely lost track of both trackers as soon as I launched. I need to practice tracking other balloons
[15:42] <Will89L> Whats the cover made from?
[15:42] <Medad> extruded polystyrene
[15:42] <Medad> Usually used as insulation
[15:42] <PE2BZ> Medad what is your RX setup / antenna ?
[15:42] <Will89L> Where did you buy it?
[15:42] <Medad> We built the tracker in house
[15:43] <Medad> the antenna we used was a Yagi connected to a Funcube dongle pro
[15:43] <Medad> to the laptop
[15:43] <Medad> https://github.com/ImperialSpaceSociety/PicoTracker
[15:43] <PE2BZ> Are you positive that you had the right connector to the Funcube dongle ? Male SMA and not reverse SMA which is common for wifi antennas and routers ?
[15:43] <Medad> Some documentation for our tracker hardware and software
[15:44] <Will89L> I mean, where did you buy the polystyrene?
[15:44] <Medad> It worked on the ground and in testing
[15:44] <PE2BZ> Yes, but that´s no distance. I do receive my trackers with a needle as antenna at home. Could you check to be shure :-)
[15:45] <Astrobiologist> Medad I think there is no point tracking in central London.
[15:45] <Medad> Well the polystyrene is widely used for creating prototype models in the Design Engineering workshop at the university so I have plenty of that stuff for free
[15:45] <Astrobiologist> there were plenty of patches where qrm was s9
[15:45] <Astrobiologist> also, even on the 10th floor I found that the payloads quickly faded, probably because they went behind other landmarks
[15:46] <Astrobiologist> finally, the radio horizon was quite low at those heights
[15:47] <Astrobiologist> if you have a ham license, we could try calling each other next time to confirm line of sight
[15:48] <Will89L> Medad, is it exactly the same material as this: https://www.ebay.co.uk/itm/40-EXPANDED-POLYSTYRENE-SHEET-SD-GRADE-600-X-400-X-10MM/261902605073?epid=17026282173&hash=item3cfa9c9b11:g:xIIAAOSwpdpVZEXz ?
[15:48] <PE2BZ> ICSPACE3 is now at 290 degrees bearing from my home. So it appears to follow quite the same track as number 2
[15:49] <Astrobiologist> PE2BZ as a possible IMU I was thinking of the Bosch BNO055, which outputs a sum vector, i.e it does all the integration for you
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[15:49] <PE2BZ> Astrobilogist I was wondering what IMU stood for
[15:50] <Astrobiologist> inertial measurement unit
[15:51] <Medad> @Will89L that looks like the extruded polystyrene. I prefer the polystyrene that is of a consistent grain(as homogeneous as possible) instead of the polystyrene made from compressing small balls of polystyrene together
[15:53] <Astrobiologist> Medad I was thinking of using a phase change material
[15:54] <SpeedEvil> Astrobiologist: now, look at the drift on the BN*
[15:54] <Medad> May work when you have a much greater lift budget I think. fitting light, leak proof enclosure on a pico tracker is hard I think. Ours weights 23g
[15:54] <SpeedEvil> Astrobiologist: the problem is not the integration - that is trivial to do. The problem is the noise on the accellerometers that go into the integration - you can't remove that
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[15:59] <DanskJ> Hi
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[16:00] <Astrobiologist> Medad I don't have the expertise to make a comparison, except that the latent heat of fusion etc is typically many times the amount of joules etc to change the temp by 1'C etc
[16:00] <SpeedEvil> Ice is probably the easiest one
[16:00] <SpeedEvil> 300kJ/kg.
[16:00] <SpeedEvil> 400 if you go from 25C
[16:01] <Astrobiologist> I have no idea if it woudl help for a small payload
[16:01] <Astrobiologist> but you could test in the freezer :-)
[16:01] <SpeedEvil> What is the payload?
[16:01] <SpeedEvil> If it's drawing >1W, getting too cold is generally not a problem
[16:02] <Astrobiologist> Speedevil hmmm we could try vibration proof mountings to remove any high frequency vibrations
[16:05] <Ian_> medad, what was the rationale for selecting a baud speed of 45.45? As I said earlier, it was/is often used by radio amateurs for Baudot type RTTY, not ASCII. It's origin may be indicated by it's name . . . Allied Interpolation Speed. Indicating a compromise between the US and European TTY speeds of the day. 50 Baud machines were slowed down to work at 44.45 Baud to communicate with a lot of US equipment.
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[16:09] Nick change: BrainDamage_ -> BrainDamage
[16:15] <Astrobiologist> Speedevil the payload I had in mind is an air sampler
[16:15] <PE2BZ> SpeedEvil the payload https://imgur.com/a/pzfa4u8
[16:15] <Astrobiologist> to see if ambient air flow and wind shear is enough to get decent airflow
[16:15] <SpacenearUS> 03geonel: Here you go: 12https://ukhas.org.uk/spacenearus_irc_bot
[16:16] <Astrobiologist> so my payload might get very cold fom ambient air
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[16:17] <geonel> !whereis icspace3
[16:17] <SpacenearUS> 03geonel: 03ICSPACE3 is near 0351.57266,-0.11889 at 03805 meters
[16:17] <PE2BZ> icspace3 has broken gps and is over the Northsea
[16:18] <Astrobiologist> I would like to add a magnetometer to measure bearing to detect wind shears
[16:18] <Astrobiologist> most magnetometers are part of MEMS IMUs
[16:18] <PE2BZ> I would estimate it´s near the coast of The Hague in the Netherland now
[16:18] <Astrobiologist> so I wondered what else you could read off the IMU
[16:20] <geonel> !whereis icspace2
[16:20] <SpacenearUS> 03geonel: 03ICSPACE2 is over 0352.29255,5.24351 at 035970 meters
[16:22] <daveake> Astrobiologist: The Bosch BNO055 is nice as it includes the fusion calculations on-board, giving you yaw (compass bearing) + roll/pitch
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[16:23] <daveake> On most other IMUs you get the raw values from the compass/accel/gyro and need to do the (complicated) fusion calcs yourself
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[16:26] <SpeedEvil> IMU used to average and improve GPS output can give lots better output.
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[16:26] <Astrobiologist> lost IRC there for a mo
[16:26] <Astrobiologist> what were people saying about IMUs?
[16:27] <Astrobiologist> if one tried to dampen vibrations, would it work?
[16:27] <SpeedEvil> The error over 60s of the IMU is probably ~5m or so, but if you use it to smooth a GPS output, you can get great continuous performance with the IMU smoothing any momentary glitches in the GPS
[16:27] <SpeedEvil> Astrobiologist: If you mean to remove errors - the errors are due to noise, not vibration.
[16:27] <Astrobiologist> speedevil where does the noise come from?
[16:28] <SpeedEvil> The sensor design.
[16:28] <Astrobiologist> I was thinking of three outputs: pure GPS, last GPS plus IMU, and pure IMU...
[16:29] <Astrobiologist> maybe you could have three different tracks on habhub and see how they diverge
[16:29] <Astrobiologist> speedevil does the datasheet e.g. for the BNO055 specify the noise?
[16:31] <SpeedEvil> It should. Accelleration noise x ug/sqrt(hz) would be the typical presentation
[16:32] <SpeedEvil> random walk distance may also be given
[16:37] <Astrobiologist> hmm is output noise density the same thing?
[16:38] <SpeedEvil> yes
[16:38] <Astrobiologist> accelerometer: 150 ug/sqrt hz
[16:39] <SpeedEvil> That is very typical.
[16:39] <Astrobiologist> gyroscope: 0.1 o/s
[16:39] <SpeedEvil> 1.5mm/s^2 or so uncertainty if you sample it once per second.
[16:40] <Astrobiologist> magnetometer: several presets from 0.3- 1.4 uT
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[16:41] <Astrobiologist> OK as a rough rule of thumb how long would it take to accumulate a positional inaccuracy o1km?f
[16:41] <Astrobiologist> of 1km?
[16:41] <OZ1SKY_Brian> hi
[16:42] <Astrobiologist> hi Brian
[16:42] <SpeedEvil> Astrobiologist: somewhere between one and ten minutes.
[16:43] <Astrobiologist> speedevil hmmm not to bad in a way, would prevent an ICSPACE 3 scenario
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[16:43] <Astrobiologist> what happens if you average lots of different IMUs?
[16:44] <SpeedEvil> If you have a hundred accellerometers, the noise drops tenfold (sqrt(n))
[16:45] <Astrobiologist> OK does that then mean if is 100 minutes for an error of 1km?
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[16:46] <SpeedEvil> It's not quite that good - as there is a sqrt() term in there somewhere.
[16:46] <SpeedEvil> So err
[16:47] <SpeedEvil> Actually yes. (10-100 minutes would be my guess).
[16:47] Action: SpeedEvil is falling asleep.
[16:47] <SpeedEvil> I have pondered a small board with 100 I2C accels.
[16:48] <Astrobiologist2> that's reassuring I thought it was only me :-)
[16:49] <Astrobiologist2> but I don't think the BNO055 has that many selectable I2C addresses though
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[16:51] <Astrobiologist2> IRC dropped again
[16:52] <SpeedEvil> yeah - not at $10 per.
[16:52] <SpeedEvil> More thinking of $1 class accell-only ones
[16:53] <Astrobiologist2> but don't you need the bearing and the tilt as well?
[16:54] <bertrik> the square root thing is for the stochastic error, if you have a systematic error, averaging is not going to help
[16:54] <SpeedEvil> bertrik: Indeed - hence the weasel words above. A proper answer would have a frequency spectrum integration in it
[16:55] <SpeedEvil> Astrobiologist2: I was more interested in a proof of principle desk unit.
[16:56] <Astrobiologist2> it is something that could actually be tested: cheap IMUs on a reel, PCB, night spent with a hot air tool...
[16:56] <SpeedEvil> yeah
[16:56] <Astrobiologist2> I usually don't allow my desk out
[16:56] <SpeedEvil> Or take a weeks data from one, and then fold it a hundred times to get an hours data.
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[16:59] <Astrobiologist2> if you chill the chip, would that reduce thermal noise in the MEMS?
[17:00] <SpeedEvil> Don't know - suspect not. It will introduce a massive offset
[17:00] <Astrobiologist2> thank you for indulging me
[17:01] <SpeedEvil> good luck
[17:01] <Astrobiologist2> actually I have two other naiive ideas:
[17:01] <Astrobiologist2> 1) star tracker?
[17:01] <Viproz> Astrobiologist2, you can still see the chat log with http://habhub.org/zeusbot/logs/highaltitude.log.20190126 if you drop out
[17:02] <SpeedEvil> Star tracker is not ridiculous, but stabilising it enough to get meaningful readings is tricky.
[17:02] <SpeedEvil> Mobile phone class sensors are quite sensitive enough
[17:05] <Astrobiologist2> 2) radio direction finding, for instance using a narrow beam Yagi, PLUS an accurate clock on the payload so you get ToF for the distance
[17:07] <Astrobiologist2> Viproz thanks for the link
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[17:19] <Astrobiologist2> If a balloon is drifting with the wind and I mount an anemometer on it, will it read zero because the balloon is travelling at the same speed as the wind?
[17:20] <SpeedEvil> In zero windshear between payload and balloon
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[17:23] <Astrobiologist> bello
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[17:24] <bertrik> welcome back
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[17:32] <Medad> ICSPACE2 is now showing the same crazy flight paths seen in ICSPACE3. Albeit over the Netherlands
[17:39] <Medad> But it looks like it may enter Germany
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[17:45] <DK6OV> Hi
[17:46] <DK6OV> It looks like ICSPACE is comming my direction
[17:46] <Medad> ICSPACE2 or ICSPACE3?
[17:47] <Medad> ICSPACE3 has been operating in stealthmode and it has not given any correct gps fix for some time
[17:47] <DK6OV> ICSPACE2 but until now I con see nothing in the waterfall
[17:47] <Medad> ICSPACE2 seems to have the same gps problem
[17:47] <Hokdsk> What happened to icspace3? Its going back and forth.
[17:48] <Medad> No idea what is wrong with ICSPACE3. It should be somewhere over the Netherlands now.
[17:49] <Medad> I now see the same back and forth problem with ICSPACE2
[17:49] <Hokdsk> Oh yes! Both are broken?
[17:50] <Hokdsk> Never saw that before.
[17:50] <Medad> I think now both are broken in the air
[17:50] <Medad> But ICSPACE3 broke almost immediately after launch
[17:51] <Hokdsk> Why?
[17:52] <PE2BZ> ICSPACE3 is between me (near The Hague) and ICSPACE2 atm
[17:52] <Medad> Thank you
[17:53] <Hokdsk> @PE2BZ how do you know rhT
[17:53] <Medad> We need to analyse the data to see what has gone wrong
[17:53] <Hokdsk> * know that? The map doesnt show anything like that.
[17:53] <PE2BZ> 7 el yagi on a rotor, now beaming 60 degrees from JO21CX
[17:54] <PE2BZ> Started picking it up 3 hours ago at 290 degrees
[17:54] <Hokdsk> 60 degrees? Not sure if I got it. Please explain .
[17:56] <SA6BSS-Mike> made a prediction of ICSPACE3 before the gps broke, asuming same float as ICSPACE2 http://predict.habhub.org/#!/uuid=c80dd1dbeeb1a78c9ef81222f5cb6064c67d8fc4
[17:56] <PE2BZ> from my location in the Netherlands, Naaldwijk , I receive ICSPACE3 now at 60 degrees antenna direction. It started at 290 degrees (southwest of me) and has passed over North to northeast now.
[17:57] <Medad> SA6BSS-Mike thank you
[17:59] <Hokdsk> Whats ( 60, 290 ) degree antenna direction? How do you measure it?
[18:00] <PE2BZ> North is zero degrees on the compass. So east is 90 degrees, south is 180 and so on
[18:00] <Hokdsk> Or is it a rotator? ...because you said you have a rotator before.
[18:00] <DK6OV> For me it looks like problem with gps. After the start it receives 8 satelites.
[18:01] <DK6OV> During the flight of ICSPACE2 it drops to 0 more and more.
[18:01] <Medad> yes I notice that. We noticed 0 satalites during testing but we were still getting fixes
[18:03] <PE2BZ> SA6BSS-Mike I confirm that ICSPACE3 indeed is more north as ICSPACE2 has been
[18:04] <Hokdsk> @PE2BZ how do you know that? Is there a way to know the location without a gps?
[18:06] <PE2BZ> Hokdsk I have a radio with signal strength indicator and a yagi antenna which is sensitive in about 30 degrees (-15 and + 15) from the center beam. That way I can rotate my antenna for the strongest signal and know where a signal comes from
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[18:06] <Hokdsk> Or course! Ok, how about your rotator? What do yo pu have? Im planning to buy or make one as well.
[18:07] <PE2BZ> KR-400 is my rotator, and it´s controlled with an interface and PST rotator.
[18:08] <Hokdsk> Do you folks recommend it or should I buy smth else?
[18:08] <PE2BZ> Completely depends on your wishes. Mine is 15 years old. Perhaps no longer available. But for only one yagi for HAB 70 cm you could do with any cheap tv rotor
[18:09] <PE2BZ> I seem to have lost both signals now
[18:09] <PE2BZ> So DK6OV it´s up to you now ;-)
[18:10] <Hokdsk> Yes, I need it for a Yagi antenna and I guess a few other things in the future. :)) . So what would you recommend? Cheap tv rotor...?
[18:11] <DK6OV> Ok, but I can not hear anything until jet.
[18:12] <SA6BSS-Mike> PE2BZ: thumbup
[18:12] <PE2BZ> I have used a cheap tv rotator for 2 years. Then I tried to speed it up so I wired 36 Volt instead of 22 Volt. It only turned once. Thats why I bought the kr-400 as used, revised item. The tv rotor should still have been working if I did not crash it.
[18:13] <Hokdsk> @PE2BZ https://www.amazon.co.uk/STAB-ANTENNA-ROTOR-HH90-Sat-Chair/dp/B005M28PPI Would that work?
[18:13] <PE2BZ> Signal on number 2 is completely gone here, number 3 is very week, looks like it might be descending.
[18:13] <PE2BZ> No, that would work for satellite dishes but can not rotate 360 degrees
[18:13] <OZ1SKY_Brian> Hokdsk thats a satellite dish rotor,
[18:14] <PE2BZ> https://www.ebay.com/itm/Channel-Master-Complete-Rotator-System-TV-Antenna-Rotor-Remote-Control-CM-9521HD/254088102729?epid=2293966979&hash=item3b28d4c349:g:gfQAAOSwuZVcRmK5:rk:2:pf:0
[18:15] <PE2BZ> something like that you should be looking for (mind the voltage, this is an USA model I think)
[18:16] <PE2BZ> Hokdsk where are you from ?
[18:16] <Hokdsk> From UK, you?
[18:17] <PE2BZ> Holland
[18:17] <PE2BZ> the west coast
[18:17] <PE2BZ> https://www.amazon.co.uk/RCA-VH226F-Outdoor-Antenna-Rotator/dp/B008468PWC
[18:18] <PE2BZ> This is the type I use for 13 cm yagi and 45 cm dish for amateur television
[18:18] <OZ1SKY_Brian> PE2BZ the real holland that is :-)
[18:19] <Hokdsk> https://www.ebay.co.uk/sch/i.html?_nkw=tv+antenna+rotor It seems to me theres nothing available in the UK... only US.
[18:19] <PE2BZ> It´s not Kim Holland ;-)
[18:19] <Hokdsk> I checked both Amazon and eBay.
[18:19] <PE2BZ> I am not responsible ;-)
[18:20] <PE2BZ> It´s the market being not interesting for TV receivers at home. Commercial rotators come in the UK for around 600 pound.
[18:20] <Hokdsk> What store do you recommend except Moonraker? I will check the stores as well.
[18:20] <OZ1SKY_Brian> lol no i mean holland region vs netherland
[18:20] <PE2BZ> Mine came from the USA and had switch on the bottom 110 / 230 V
[18:22] <PE2BZ> ICSPACE3 is strong received in Almere (use google maps please) with antenna direction East (Germany, direction Nordhorn und weiter)
[18:22] <PE2BZ> 434.249 MHz 45.45 Baud rtty
[18:23] <bertrik> can i see it on a websdr somewhere?
[18:24] <Hokdsk> @PE2BZ, makes sense. Could you please check.
[18:24] <Hokdsk> This website: https://www.ebay.co.uk/sch/i.html?_nkw=tv+antenna+rotor
[18:25] <Hokdsk> There are quite a few ( scroll down a bit ). Which would you recommend? Im really confused with those things :)))
[18:31] <PE2BZ> bertrik http://websdr.pe2bz.nl:8075/
[18:31] <PE2BZ> 434.250 still shows traces of the ICSPACE3 but ICSPACE2 on 434.600 is out of range
[18:31] <PE2BZ> That is received in Naaldwijk at 27 m ASL
[18:33] <PE2BZ> Hokdsk if I filter on the left ¨UK only¨ there is nothing left....
[18:34] <Hokdsk> I know, but some of them ship to the UK.
[18:35] <PE2BZ> Shipping AND taxes !
[18:35] <Hokdsk> well, so what should I do? :)
[18:36] <YO3ICT> PE2BZ What do you use as strings for payload and parachute?
[18:37] <PE2BZ> YO3ICT recycled wire from the RS41 sondes we get sponsored. Mostly have around 40 meter of wire around it.
[18:37] <YO3ICT> PE2BZ Is that nylon? Fishing wire?
[18:38] <PE2BZ> No fishing wire. How would we call that..... Let me think...
[18:39] <daveake> Don't use actual wire - payloads sometimes land over powerlines
[18:39] <daveake> Most people use braided nylon
[18:41] <PE2BZ> braided nylon would be the word I was looking for :-)
[18:41] <daveake> :)
[18:42] <YO3ICT> Thanks!
[18:42] <Hokdsk> @PE2BZ, pls check above. :)
[18:43] <PE2BZ> Hokdsk be patient ;-)
[18:44] <PE2BZ> I am messenger supporting first time listeners in the NE part of Holland to receive the payloads.
[18:44] <PE2BZ> Who first needed to set the ppm for their dongle and now have to learn dlfldigi to set the bandwidth
[18:45] <DK6OV> I now get a signal with 745 Hz shift. But the frequency ist drifting 400 Hz during one package.
[18:46] <DK6OV> It is impossible to decode that signal with fldigi-HAB
[18:46] <PE2BZ> DK6OV that´s the right one :-(
[18:46] <PE2BZ> No it is not impossible ;-)
[18:46] <DK6OV> How?
[18:46] <PE2BZ> set rx bandwidth to 650 Hz, wait for the beeps, ten in total, tune the beeps between the mark and space lines and have AFC turned on :-)
[18:47] <PE2BZ> YO3ICT Vaisala calls it Non-UV treated polypropylene string, tenacity less than 115 N
[18:48] <PE2BZ> Hokdsk this is the one I use for my small dish and 2400 MHz yagi https://www.ebay.co.uk/itm/Channel-Master-Complete-Rotator-System-TV-Antenna-Rotor-Remote-Control-CM-9521HD/254088102729?epid=2293966979&hash=item3b28d4c349:g:gfQAAOSwuZVcRmK5:rk:41:pf:0
[18:48] <PE2BZ> It has memories, but not an actual position sensor feedback so needs to be calibrated every now and then.
[18:49] <YO3ICT> THe channel master rotator is a mess.
[18:50] <YO3ICT> I have this kind of rotator but I eventually replaced it with a Yaesu one. The hard limit stop is absolutely crap and it gets stuck when you try to recalibrate and you'll need to open it up to free the mechanism. I strongly suggest that you will install an multiturn potentiometer for feedback and get rid of that hard limit stop with a metal grinder. Then, the K3NG rotator controller works just fine. I use it for my EME beam for
[18:50] <DK6OV> I have AFC set on and AFC-Speed set to fast, but that is not enough. It don't follows the signal.
[18:51] <PE2BZ> DK6OV no radio with cat control attached I guess ?
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[18:52] <DK6OV> No, I have no cat-control aktive, but fldigi can shift the frequency for its one
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[18:53] <YO3ICT> PE2BZ Do you know how much a 80cm balloon can lift? Been 5 years since I launched anything. My Skype invite should have came by now.
[18:54] <Hokdsk> Hah :) I got disconnected right after this message [18:43] <PE2BZ> Hokdsk be patient ;-)
[18:54] <Hokdsk> Hackers. :)
[18:54] <PE2BZ> I am messenger supporting first time listeners in the NE part of Holland to receive the payloads.
[18:55] <PE2BZ> Who first needed to set the ppm for their dongle and now have to learn dlfldigi to set the bandwidth
[18:55] <PE2BZ> Hokdsk this is the one I use for my small dish and 2400 MHz yagi https://www.ebay.co.uk/itm/Channel-Master-Complete-Rotator-System-TV-Antenna-Rotor-Remote-Control-CM-9521HD/254088102729?epid=2293966979&hash=item3b28d4c349:g:gfQAAOSwuZVcRmK5:rk:41:pf:0
[18:55] <PE2BZ> And then YO3ICT said
[18:55] <PE2BZ> <YO3ICT> THe channel master rotator is a mess.
[18:55] <PE2BZ> <YO3ICT> I have this kind of rotator but I eventually replaced it with a Yaesu one. The hard limit stop is absolutely crap and it gets stuck when you try to recalibrate and you'll need to open it up to free the mechanism. I strongly suggest that you will install an multiturn potentiometer for feedback and get rid of that hard limit stop with a metal grinder. Then, the K3NG rotator controller works just fine. I use it for my EME beam
[18:55] <PE2BZ> for
[18:56] <PE2BZ> YO3ICT 80 cm latex or foil ?
[18:56] <YO3ICT> Foil.
[18:56] <PE2BZ> fully round or flat like the 36 inch qualatex ?
[18:57] <YO3ICT> The flat ones that are commonly available at party stores.
[18:57] Action: PE2BZ is completely clueless where ICSPACE3 is hidden
[18:58] <PE2BZ> If you allow burst, around 60 gram (ours did float on 1500 m for 36 hours with receivers and might still float)
[18:59] <PE2BZ> ICSPACE3 is coming in nicely on the X-5000 omni but almost lost on the 7 el yagi ?
[19:00] <PE2BZ> Which makes me think it is on it´s way down
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[19:01] <Hokdsk_> I got disconnected again.
[19:02] <PE2BZ> You did not miss a lot, you where reported offline for 2 seconds ?
[19:03] <SA6BSS-Mike> YO3ICT: PE2BZ: this gives you an idea how high a payload will float , the 92cm means 36" qualatex https://ukhas.org.uk/projects:microballoons:data
[19:03] <PE2BZ> Nice Mike ! More is better :-)
[19:03] <Hokdsk_> At least 1-2 minutes. :) Ok, so I can buy the one your @PE2BZ recommend which is https://www.ebay.co.uk/itm/Channel-Master-Complete-Rotator-System-TV-Antenna-Rotor-Remote-Control-CM-9521HD-/254088102729 but since you said its a mess... I wont be able to hack it in able to fix it or change
[19:03] <Hokdsk_> anything inside.
[19:04] <PE2BZ> Could be a bit of a challenge to fill 4 balloons with the same amount of gas however MIke
[19:04] <Hokdsk_> Having said that, is that the right choice or do you recommend something different?
[19:04] <PE2BZ> Hokdsk_ I do not know what your budget is. And your demands.
[19:05] <PE2BZ> If there is a possibility you don´t like this hobby after 2 years this is well spent.
[19:05] <YO3ICT> SA6BSS PE2BZ The only one that I have launched was a 80cm one filled I think to 90% or more. It burst at about 6000m. I don't remember the payload weight though.
[19:06] <YO3ICT> SA6BSS PE2BZ This was the launch https://www.flickr.com/photos/112835821@N02/14732196676/in/album-72157645953227792/
[19:07] <Hokdsk_> Way below mentioned 600 pounds. :) Smth relatively cheap. As for the demands, I have a few antennas and would be great to use it with those. I have: Yagi 7 el directional antenna, 1090Mhz directional and https://www.moonraker.eu/arrow-ii-146-437-14wbp-handheld-portable-satallite-antenna
[19:07] <Hokdsk_> Please help. :)
[19:08] <PE2BZ> The antennas would fit the linked rotor. However you have to consider to have to re-calibrate every now and then to have the north beaming north.
[19:08] <PE2BZ> For me it works at least ;-)
[19:15] <PE2BZ> YO3ICT this was our floater which floated to Danmark at 1550 m altitude. it was 73 gram payload.
[19:15] <PE2BZ> https://www.dropbox.com/s/4qi5q5oqynlpxjp/VID_20190118_133225.mp4?dl=0
[19:19] <Hokdsk_> How hard it is to recalibrate it? Is it software or hardware issue?
[19:20] <YO3ICT> PE2BZ Can you provide additional details? I am planning another launch in spring. I do not want to float as I want to recover the tracker. Can you give some guidance?
[19:22] <PE2BZ> YO3ICT don´t use the foil balloons would be my advice. Either go for the 90 cm latex from the toy store ( 7700 m burst with 100 gram payload) , or the 100 gram Pawan from Steve Random engineering ( 18 km burst wtih 100 gram payload)
[19:27] <PE2BZ> There is a button on the unit to calibrate it, takes about 140 seconds. It rotates left to end, right to end and knows where it´s endpoints are again.
[19:28] <PE2BZ> I am away for the night.
[19:28] <PE2BZ> Bye all !
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[19:30] <Astrobiologist2> I have looked up the price of bulk buys of BNO055 IMUs
[19:31] <Astrobiologist2> just in case someone really wants to average them to get rid of sensor noise
[19:31] <Astrobiologist2> £10 for one, £74 for ten, £554 for one hundred or £4500 for 100!
[19:32] <Astrobiologist2> however, they only have two selectable I2C addresses so it is a bit of a challenge ;-)
[19:32] <Astrobiologist2> for £7000 you can buy a true pro end Honeywell IMU anyway
[19:35] <DK6OV> I now can receive ICSPACE2 and 3 but no decode because of the extreme frequency drift.
[19:36] <SA6BSS-Mike> I texted a hab friend in most S of sweden to listen out for them
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[19:56] <Astrobiologist2> ah but no way to read multiple IMUs all simultaneously though
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[20:36] <Astrobiologist2> goodnight
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[20:58] <nigle> Using lots of I2C devices with 2 different addresses selected by an input can be achieved by using the address select input as a chip enable, set all but one of them to the same address and then use the other address for communication. This worked fine for me in a design I did a while back, but some chips might not like it.
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[23:02] <OZ1SKY_Brian> hear icspace3
[23:03] <OZ1SKY_Brian> nothing from icspace2
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[23:09] <OZ1SKY_Brian> $$$$CSPACE3,634,230907,+51n5265,-000.118881,85,0,3,0008,09*92B6
[23:10] <OZ1SKY_Brian> $$$$ICSPAC3,635,23109+51.572665l-000.11888,05,00,6,0008,0y*1A05
[23:11] <OZ1SKY_Brian> $ISCE3,636,23111,+1.57r66,-00.118881,805,0 ,3206,0008,-09*330
[23:12] Nick change: BitEvil -> SpeedEvil
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[23:15] <OZ1SKY_Brian> $$ICSPACE3,639,31417,+51.572665,-000.118881,805,0,2030008,-9*7973
[23:15] <OZ1SKY_Brian> very hard to decode with that heavy drift
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[23:25] <OZ1SKY_Brian> no clean decodes, AFC can´t keep up in fldigi
[23:26] <Medad> Its amazing that ICSPACE3 is still running
[23:26] <OZ1SKY_Brian> $$ICSPACE3,650,232539,+51.57265,-000.18881,805,0,2,0008,-9*425E
[23:26] <Medad> How much drift during the transmission?
[23:26] <OZ1SKY_Brian> yeah, not hearing ICSPACE2
[23:27] <OZ1SKY_Brian> about 400hz
[23:28] <Medad> That is serious. Thanks for that info. Improvements need to be made
[23:34] <SA6BSS-Mike> whan I sent up trackers with normal crystals on , I let the do 3 rtty seqencies before rolling back to beebs, that way usuly one was decodable even at below -50
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[23:37] <OZ1SKY_Brian> what was the last knowen freq of icspace2?
[23:37] <Medad> Thanks that can be useful. But we also need to save power on our pico tracker
[23:37] <SA6BSS-Mike> it made +60h with a AA lithium :)
[23:38] <Medad> 434.603
[23:38] <SA6BSS-Mike> what run time do you expect ?
[23:39] <Medad> At most 16 hours
[23:39] <SA6BSS-Mike> ok
[23:39] <Medad> we are using a lithum AAA
[23:39] <Medad> https://imgur.com/a/pzfa4u8
[23:39] <Medad> Picture of our tracker
[23:40] <SA6BSS-Mike> some info here https://www.qsl.net/sa6bss/hab.html
[23:41] <SA6BSS-Mike> of to bed, gn all
[23:41] <OZ1SKY_Brian> gn mike
[23:41] <Medad> Thank you for the info!
[23:45] <OZ1SKY_Brian> looks like icspce3 is getting weaker now
[23:52] <Medad> Still flying. Amazing
[23:52] <OZ1SKY_Brian> too weak for the AFC now, 434.249 ATM, going out of range
[23:53] <OZ1SKY_Brian> 434.248.5 is more correct
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[23:59] <OZ1SKY_Brian> gn all
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[00:00] --- Sun Jan 27 2019