- Status Report
- Feb 6, 2023
AMSAT: AO-40 is transmitting on 2401.305 MHz
ANS is pleased to confirm that AO-40 is transmitting on 2401.305 MHz.
Prior to this confirmation, the satellite had not transmitted any signals
since December 13, 2000, which was shortly after the first burn of the
Peter, DB2OS, provided ANS with the following information:
On December 25, 2000 at 21:45 UTC command station ZL1AOX
transmitted a L-band reset command which included an initialization
block to switch ‘on’ one of the two S-band transmitters onboard AO-40.
Just after the first attempt, AO-40’s S-2 beacon was received by Ian,
ZL1AOX, on 2401.305 MHz. The signal strength was S-5 to S-6, which
compares to S-2 when the beacon was last heard last during testing in
AO-40’s S-band transmitter produced a steady signal at ZL1AOX and
from the doppler wobbling it was also clear that it was in fact coming
ZL1AOX reported that he was able to copy and observe the S-2
beacon until LOS at 03:45:15 UTC. Predicted LOS from NORAD’s
orbital set #12 indicated a LOS within 5 seconds of that time.
At the time of reception, AO-40’s approximate distance from ZL1AOX
was 61,470 kilometers.
Later today (December 26th), ZL1AOX will re-acquire AO-40 shortly
after perigee with a reasonably good squint angle. He will than start
reloading AO-40’s IPS software. Until that task is completed, AO-40’s
beacon will not carry any telemetry, just carrier.
Stay tuned to ANS for additional bulletins from AMSAT, the
official source for information on AMSAT OSCAR-40.
[ANS thanks AMSAT-DL and AMSAT-NA for this information]