Drew,

I was working the AO-85 pass this afternoon where you heard the multiple resets. While I was using my TH-D72A HT and Elk log periodic to make some QSOs, I was making an RF recording with my SDRplay SDR receiver, HDSDR, and the AMSAT-UK VHF crossed dipole. I have uploaded the telemetry I received from that pass to the AMSAT server, and have posted files related to that pass (MP3 with audio I recorded from the HT, big WAV file with the RF recording from HDSDR, and other files) to my Dropbox space at:

http://dropbox.wd9ewk.net/

(Look for the folder "20151127-AO85_Fox1A-DM43").

I observed what appears to be a bunch of resets from about halfway into the pass until my LOS. Here's what I was seeing (times are UTC, and I sync'd the tablet's clock with a time server a few minutes before this pass):

22:31:40 - Telemetry off 22:32:09 - Telemetry on 22:32:37 - Telemetry off 22:33:07 - Telemetry on 22:33:17 - Telemetry off 22:33:45 - Telemetry on 22:34:00 - Telemetry off 22:34:20 - Telemetry on 22:34:29 - Telemetry off 22:35:00 - Downlink on after long pause, telemetry off 22:35:28 - Downlink on, telemetry off 22:35:49 - Telemetry on 22:35:58 - Telemetry off 22:36:21 - Telemetry on 22:36:27 - Telemetry off 22:36:52 - Telemetry on 22:36:58 - Telemetry off 22:37:21 - Telemetry on 22:37:27 - Telemetry off 22:37:50 - Telemetry on 22:37:56 - Telemetry off, and I didn't see it switch on again before my LOS

I worked the next pass after this one, around 0008-0019 UTC. I don't recall seeing anything that looked like telemetry coming from the satellite, and had a harder time getting through the repeater - even at 50 watts. I will upload the audio (MP3) and RF (big WAV) recordings to my Dropbox space, in a folder "20151128-AO85_Fox1A-DM43".

73!

Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK

On Sat, Nov 28, 2015 at 1:25 AM, Andrew Glasbrenner < [email protected]> wrote:

Earlier this evening I listened to a pass of AO-85 about 2235UTC and the IHU was rebooting repeatedly. You can tell when this happens by the short tone it emits, just before it drops to carrier operated relay (COR) mode. If this hasn't cleared on its own by the next passes in the early AM over the East Coast, we'll try to reset it by command. In the meantime, any reports or telemetry submitted would be wonderful.

73, Drew KO4MA

AMSAT-VP Operations