SSTV alive and well this morning.
More great pictures.
On Wed, 2008-10-22 at 08:08 +0100, David Barber wrote:
SSTV alive and well this morning.
More great pictures.
I was able to hear it, but it was too noisy to decode the picture. You can see that qsstv thinks there's Robot36 there, but that's about it. A combination of an omnidirectional antenna and a low pass (10 degrees maximum elevation at my QTH in IO75) didn't really help.
Maybe for the next time they're using SSTV on the ISS I'll have my quad on a rotator. Actually, that gives me an idea, but I'll save it for another email...
Gordon
Nothing heard on the 0834UTC pass.
Both recordings are available from:
http://www.gjcp.net/~gordonjcp/pass1.ogg http://www.gjcp.net/~gordonjcp/pass2.ogg
Not that they're terribly interesting. I'll make the whole lot available once I've had a chance to sort them all out. I'm really annoyed I missed the "last" pass yesterday - apparently there was some voice traffic over the UK.
Just as a bit of background to how I'm doing this, I have my Trio TR7730 and homebrew omni at home, with the speaker output hooked up to a laptop which I can connect to remotely. I can then ssh in and tell the laptop to wait for a while then start recording, based on the time-to-AOS from gpredict.
So, for instance, if I look at gpredict I see "ARISS AOS in 1:15:xx". I connect to the laptop and type in "sleep 75m; arecord -r22050 -f S16_LE -d 600 pass3.wav" and then leave it. Once the pass is finished, I encode the .wav file, upload it to my server, and then grab it from work where I can sit and listen ;-)
Unfortunately I can't tune the transceiver to compensate for Doppler, and in a couple of the recordings you can hear this. It seems to be worse as the ISS goes away, I haven't worked out why this would be yet. My plan is to automate the recording by working out the passes and having it kick off the recorder. Now since the transceiver has "UP" and "DOWN" buttons on the microphone, I could probably tell it to tune up and down 5kHz by toggling pins with the printer port.
Anyway, considering how simple the equipment to receive the SSTV and voice signals from the ISS can be, I'm quite pleased with my results. I can't wait until they do some more!
Gordon
participants (2)
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David Barber
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Gordon J. C. Pearce MM3YEQ