AO-73 : Funcube-1

VK5HILeave a comment

Rotation Period

17 Jun 2022 = 2.35 seconds (from the Sun Sensor Data)
18 Jun 2022 = 2.30 seconds (from the Sun Sensor Data)
19 Jun 2022 = 2.28 seconds (from the Sun Sensor Data)
20 Jun 2022 = 2.32 seconds (from the Sun Sensor Data)
21 Jun 2022 = 2.31 seconds (from the Sun Sensor Data)
22 Jun 2022 = 2.30 seconds (from the Sun Sensor Data)
23 Jun 2022 = 2.29 seconds (from the Sun Sensor Data)

AO-73 continues spinning about the Z-Z axis at a fast rate with the Z-Z axis very slowly precessing about AO-73’s centre of mass in a relatively stable attitude.

73 de Colin VK5HI.

AO-73 : Funcube-1

VK5HILeave a comment

Rotation Period

10 Jun 2022 = 2.42 seconds (from the Sun Sensor Data)
11 Jun 2022 = 2.38 seconds (from the Sun Sensor Data)
12 Jun 2022 = 2.35 seconds (from the Sun Sensor Data)
13 Jun 2022 = 2.39 seconds (from the Sun Sensor Data)
14 Jun 2022 = 2.37 seconds (from the Sun Sensor Data)
15 Jun 2022 = 2.37 seconds (from the Sun Sensor Data)
16 Jun 2022 = 2.35 seconds (from the Sun Sensor Data)

AO-73 continues spinning about the Z-Z axis at a fast rate with the Z-Z axis very slowly precessing about AO-73’s centre of mass in a relatively stable attitude.

73 de Colin VK5HI.

AO-73 : Funcube-1

VK5HILeave a comment

Rotation Period

03 Jun 2022 = 2.57 seconds (from the Sun Sensor Data)
04 Jun 2022 = 2.55 seconds (from the Sun Sensor Data)
05 Jun 2022 = 2.53 seconds (from the Sun Sensor Data)
06 Jun 2022 = 2.52 seconds (from the Sun Sensor Data)
07 Jun 2022 = 2.50 seconds (from the Sun Sensor Data)
08 Jun 2022 = 2.47 seconds (from the Sun Sensor Data)
09 Jun 2022 = 2.44 seconds (from the Sun Sensor Data)

AO-73 continues spinning about the Z-Z axis at a fast rate with the Z-Z axis very slowly precessing about AO-73’s centre of mass in a relatively stable attitude.

The most recent WOD downloaded over VK on the 9th June at 0642utc.

73 de Colin VK5HI.

Requesting AO-27 Telemetry & Reception Reports

DK3WNLeave a comment

AO-27’s on/off times run open-loop and have drifted a bit so that the information on ao27.net is out of date. We’re trying to collect current telemetry before attempting to upload new settings.

AO-27 sends 20 seconds of AFSK telemetry followed by 240 seconds of FM repeater operation during descending nodes (North to South passes). As best we can determine from Satnogs observations, the satellite currently turns on when near the equator and shuts off at about 12-14 deg South latitude. Stations with UHF receive capability should be able to receive the telemetry and detect/use the FM repeater operation.

We think the ascending node on time begins when AO-27 is at about 75 deg N latitude and ends around 85 deg N as the satellite begins the descending part of the orbit. Stations probably have to be fairly far north with good northern horizons to hear anything. No telemetry is sent on ascending node passes.

The AO-27 command team would greatly appreciate reception reports, especially with the time(s) telemetry or repeater operation started/ended. Please provide station location, 6 character grid square is sufficient.
If you have AFSK reception/decode capability, any telemetry successfully decoded.
Reports from northern stations able to copy the start or end of the ascending node on time are also sought.

Please send reports to ks1g@amsat.org

Thanks in advance from the AO-27 command team.
de KS1G

AO-73 : Funcube-1

VK5HILeave a comment

Rotation Period

27 May 2022 = 3.00 seconds (from the Sun Sensor Data)
28 May 2022 = 2.92 seconds (from the Sun Sensor Data)
29 May 2022 = 2.85 seconds (from the Sun Sensor Data)
30 May 2022 = 2.79 seconds (from the Sun Sensor Data)
31 May 2022 = 2.74 seconds (from the Sun Sensor Data)
01 Jun 2022 = 2.67 seconds (from the Sun Sensor Data)
02 Jun 2022 = 2.65 seconds (from the Sun Sensor Data)

AO-73 continues spinning about the Z-Z axis at a fast rate with the Z-Z axis very slowly precessing about AO-73’s centre of mass in a relatively stable attitude.

73 de Colin VK5HI.

AO-73 : Funcube-1

VK5HILeave a comment

Rotation Period

20 May 2022 = 4.12 seconds (from the Sun Sensor Data)
21 May 2022 = 3.13 seconds (from the Sun Sensor Data)
22 May 2022 = 3.71 seconds (from the Sun Sensor Data)
23 May 2022 = 3.52 seconds (from the Sun Sensor Data)
24 May 2022 = 3.25 seconds (from the Sun Sensor Data)
25 May 2022 = 3.22 seconds (from the Sun Sensor Data)
26 May 2022 = 3.11 seconds (from the Sun Sensor Data)

AO-73 continues spinning about the Z-Z axis with the Z-Z axis slowly precessing about AO-73’s centre of mass in a non-stable attitude.

73 de Colin VK5HI.

AO-73 : Funcube-1

VK5HILeave a comment

Rotation Period

13 May 2022 = 5.19 seconds (from the Sun Sensor Data)
14 May 2022 = 5.38 seconds (from the Sun Sensor Data)
15 May 2022 = 5.29 seconds (from the Sun Sensor Data)
16 May 2022 = 5.00 seconds (from the Sun Sensor Data)
17 May 2022 = 4.71 seconds (from the Sun Sensor Data)
18 May 2022 = 7.10 seconds (from the Sun Sensor Data)
19 May 2022 = 4.31 seconds (from the Sun Sensor Data)

AO-73 continues spinning about the Z-Z axis with the Z-Z axis slowly precessing about AO-73’s centre of mass in a non-stable attitude.

73 de Colin VK5HI.