When FUNcube was first launched, I went out to listen to it on the first pass that I was home for (orbit #11 I believe). Since I live in an apartment building, I have to go outside to hear most satellite passes. I recorded the audio on my normal MP3 voice recorder and to my great surprise, when I fed the audio into my computer, I was able to decode several packets. I was not expecting it to be robust enough to survive 192 kbps MP3 compression and encoding.
73,
Paul, N8HM
On Mon, Apr 21, 2014 at 5:07 AM, Nick Pugh K5QXJ quadpugh@bellsouth.netwrote:
Hi Phil et All I can copy and decode the beacon at 30 mw EIRP using the M^2 yagi at very low SNR ~ 10 db SNR I do not see much fading
nick
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Phil Karn Sent: Saturday, April 19, 2014 4:34 AM To: amsat-bb@amsat.org Subject: [amsat-bb] FUNcube telemetry performance?
I haven't done anything with AO-73, but I understand it's transmitting the FEC format I originally designed for AO-40.
How well is it working? What fraction of the frames are successfully decoded? How bad is the fading? I designed my format specifically for the spin fading on AO-40, and if the fading due to the tumbling of a cubesat is too slow my format won't be able to fix it.
Phil
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