highaltitude.log.20190212

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[10:12] <SpacenearUS> New vehicle on the map: 03PE2BZ - 12https://tracker.habhub.org/#!qm=All&q=PE2BZ
[10:25] <GyroW> I'm actually a HAM but I've never done much digital modes, that part is pretty new to me
[10:26] <SpacenearUS> New vehicle on the map: 03N4XWC-1 - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
[10:33] <PE2BZ> SA6BSS-Mike|2 currently on the map the 13 gram Solar tracker which arrived from the US of A this morning. I will make some photos. Came alive nicely in the spring morning sun, batteries went from 3.7 to 4.28 V allready :-) Qualatex and weight for filling where included :-)
[11:00] <mwheeler> Darkside: WOLLERT receiver popped up in north north melbourne
[11:01] <mwheeler> Tomorrow does not look good for chasing :( https://usercontent.irccloud-cdn.com/file/W9jKmREZ/image.png
[11:05] <PE2BZ> Good morning all. Is it possible to change the payload doc to have it show the sequence number on the tracker page ?
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[11:13] <PE2BZ> Lahti https://imgur.com/a/JcZCM6b defenitely satellites :-)
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[11:19] <Lahti> nice, cute patterns in the middle of the picture are familiar from this day
[11:20] <PE2BZ> The strong signal at 401.1 is a buoy at 7 km distance. That´s my reference to see doppler ;-)
[11:21] <Darkside> PE2BZ: can you split the output of that antenna?
[11:21] <Darkside> also what kind of antenna is it?
[11:27] <Lahti> Today, as I followed the Estonian DFM, the frequency wandered at 3100Hz, not the Graw company heard TCXO :D
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[11:36] <PE2BZ> Darkside it´s splitted allready, the output of the sondeamp feeds the 10 MHz airspy for the recording, the 6 MHz airspy for the websdr and one rtl-sdr for the waterfall
[11:36] <Darkside> ok
[11:36] <PE2BZ> It´s a colinear for 380 - 420 MHz with 3 dB gain, from our old Tetra installation at work
[11:36] <Darkside> ahh ok
[11:37] <Darkside> not so amazing for satellites i guess
[11:37] <Darkside> but i guess it does work
[11:37] <Darkside> you'll see stuff < 40 degrees or whatever
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[12:02] <SA6BSS-Mike|2> PE2BZ: Nice toy!! :)
[12:02] <SA6BSS-Mike|2> will by a sd card today and try to get this going http://www.om3bc.com/docs/SF/sondefinder_en.html
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[12:10] <Ian_> GyroW , no problem. G0PAi here. The subject area is vast and RTTY as well as other digital modes are unfamiliar to anyone that hasn't taken an active interest in them. It's all good stuff of course.
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[12:31] <GyroW> Yeah I thought there was more readily available software that modulate afsk text
[12:34] <GyroW> But just to understand it correctly: AFSK is modulating the audio and sending that to a transmitter which in turn modulates it to FM?
[12:42] <daveake> GyroW: For APRS for example, yes it's AFSK, so you generate an audio wave and send that to the FM transmitter
[12:43] <daveake> For RTTY it's FSK, so the bit stream 1's and 0's go straight to the FM transmitter
[12:43] <GyroW> ah like that
[12:43] <daveake> On the Pi for APRS, I generate an audio file then run a command to play it
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[12:44] <daveake> Mostly that's fsphil's APRS code not mine; I just modified it so it builds the audio file instead of playing the notes directly
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[13:10] <GyroW> Link to that code daveake ?
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[13:39] <dbrooke> probably https://github.com/PiInTheSky/pits
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[16:19] <daveake> Yup. Specifically aprs.c, unsurprisingly :)
[16:19] <daveake> sry for delay 3-hr drive home from customer
[16:21] <SpacenearUS> New vehicle on the map: 03YO3ICT - 12https://tracker.habhub.org/#!qm=All&q=YO3ICT
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[16:41] <Ian_> Back home: I hadn't realised that you generated the AFSK to a file and then aplayed it, or similar, for the txr daveake. I obviously hadn't looked at the APRS generation ^^. :)
[16:42] <PE2BZ> For the satellite interested the narrow band transponder of Oscar-100 is ¨open
[16:42] <fsphil> iirc live audio had issues
[16:43] <fsphil> there where short gaps in the output
[16:49] <daveake> I never tried "live" video; I just went for the expedient option :)
[16:49] <daveake> er live sound
[16:52] <Ian_> Hi fsphil, yes I guess that it might end up occasionally glitchy on the RPi. I did look at the Arduino code for generating AFSK some while ago and thought that it was a good idea. I remember several decades ago when phase continuous tone generation (ssb tx) for FSK was nirvana. So easy when you just change the rate of winding out the sinewave . . . that was back in LM709 days ;)
[16:52] <Ian_> I SEE what you mean
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[17:57] <YO3ICT> I keep losing the GPS fix when in power mode. Going to max performance aquires the fix quickly again. GPS is seeing only half of the sky(near building with metal roof). Any thoughts?
[17:57] <YO3ICT> *when in power saving mode
[17:59] <craag> your gps antenna may be underperforming, not giving enough s/n for the low-power tracking loop to stay locked.
[17:59] <craag> only seeing half the sky won't be helping at all :)
[17:59] <YO3ICT> The antenna is chip antenna from Upu. GPS Max 8C
[18:00] <YO3ICT> It is not always losing fix, looks random. So it is related to the limited sky coverage?
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[18:56] <SpeedEvil> reflections of GPS sats can do nasty things.
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[19:07] <PE2BZ> SA6BSS-Mike (and others who are interested) https://photos.app.goo.gl/43HtuwZdUVyxk6Gx5 for the photos of the solar tracker
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[19:40] <SpacenearUS> New vehicle on the map: 03163ct1971_chase - 12https://tracker.habhub.org/#!qm=All&q=163ct1971_chase
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[19:53] <SA6BSS-Mike> PE2BZ: tnx !
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[19:54] <SpacenearUS> New position from 03MAD-1a after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=MAD-1a
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[23:25] <SpacenearUS> New vehicle on the map: 03VK3FUR-laptop_chase - 12https://tracker.habhub.org/#!qm=All&q=VK3FUR-laptop_chase
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[23:31] <mwheeler> (not chasing, just testing chasemapper with network GPS)
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[23:42] <TimMc_> ozone!
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[00:00] --- Wed Feb 13 2019