Hi Carl, I've seen this recently myself too.. On the occasions when it happened here over the UK, the bird "should" have been in high power mode, but after looking at telemetry it appears that it had switched into low power mode much earlier that than usual, from memory the footprint was only half in eclipse. Also noticed that before it cuts off that there is usually 10-15 or so seconds of a silent carrier. On another occasion it cut out halfway through a SSTV transmission - this I'm almost certain shouldn't have happened due to the way the firmware was written.
Perhaps a bad solar panel contributing to low voltage when approaching eclipse? I had noticed one of the panel temps was over 75c on several passes. It certainly looks like there is some intermittent problems beginning to raise their head, lets hope it's not a steady decline in the bird's performance as gathering the SSTV pics, telemetry etc has been a very enjoyable change to the usual FM/SSB activity. 73 de Pete Mi0VAX On Sat, Aug 27, 2011 at 3:59 AM, Carl Rimmer <cfrim...@gmail.com> wrote: > I was having a really good pass gpong from my NW-SE and I had copied 6 > frames of Telemetry and 5 frames of KURSK data when the bird just went > silent. It never came back during this pass. It was the 08-27-2011 0241 > UTC pass over Lake Erie. I am curious if anyone has heard it since than. > That is probably the best I have copied it since day one. The frames where > forwarded. The MET was 55' 33". Bat Voltage = 35.668; Bat Current = -16 > ma. I've never heard it just go silent like that and not come back up. > > Carl W8KRF > _______________________________________________ > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
