AO-73 : Funcube-1

Rotation Period

13 Aug 2021 = 18.1 seconds (from averaged panel temperatures)
14 Aug 2021 = 16.4 seconds (from averaged panel temperatures)
15 Aug 2021 = 15.6 seconds (from averaged panel temperatures)
16 Aug 2021 = 16.9 seconds (from averaged panel temperatures)
17 Aug 2021 = 17.8 seconds (from averaged panel temperatures)
18 Aug 2021 = 17.6 seconds (from averaged panel temperatures)
19 Aug 2021 = 17.4 seconds (from averaged panel temperatures)

Special thanks to Terry VK5GU and Colin VK3HBF for their continued assistance with downloads this week.

As reported last week AO-73 was noted to have commenced “wobbling” about its unbalanced MOI.
On the 16th August this motion about the MOI became significant and we currently have AO-73 displaying a very complex attitude.

Real-time WOD for one orbit from the 0618utc Pass 19th August 2021

Realtime Telemetry over VK 0738utc pass 18th August 2021

73 de Colin VK5HI.

LEDSAT active

1k2 GMSK beacons received, now switched to 9k6
all packet uploaded to SatNOGS

1: [1KUNS-PF] [10:42:46R]
[priority:2 src:1 src_port:59 dest:9 dest_port:8 len:144 FEC_err:0 RS_err:2]
82 92 3B 00 16 2A 01 5B 59 68 77 F6 F3 AC 0C 8E 0C 9D 0C A0 02 07 00 A2 00 0D 08 04 00 01 00 01 00 01 00 01 00 00 00 00 00 ED 00 6A 20 73 00 00 01 AF 00 0A 00 00 04 4B 00 00 00 00 FF 8B 03 62 00 0F 00 11 FC 2B 03 63 FE 42 10 FA F9 D8 00 A6 01 5E 03 9D 00 4B FD C1 FF E7 05 46 00 45 00 39 02 18 00 D6 00 45 00 34 08 00 27 A2 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 04 02 95 C8 F8 A4 25 DF CB B4 84 CA BE 49 A8

1: [1KUNS-PF] [10:43:01R]
[priority:2 src:1 src_port:26 dest:9 dest_port:8 len:144 FEC_err:0 RS_err:0]
82 92 1A 00 16 2A 01 5B 59 68 78 05 F3 A8 09 2D 09 83 08 44 00 76 02 34 00 4B 08 03 00 01 00 01 00 01 00 01 00 00 00 00 00 BC 00 6A 20 69 00 00 01 AF 00 0C 00 00 04 4C 00 00 00 00 FF 8A 03 62 00 10 00 13 FC 0D 03 3F FE 6B 08 83 E8 AA E9 2A 01 2C 03 6B 00 AF FD DA FF E7 05 91 00 58 02 38 00 16 00 3D 00 66 00 58 08 00 27 A2 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 04 24 B5 E8 68 C6 45 7F 31 A3 DA A2 2D 49 A8

AO-73 : Funcube-1

Rotation Period

06 Aug 2021 = 32.3 seconds (from averaged panel temperatures)
07 Aug 2021 = 29.3 seconds (from averaged panel temperatures)
08 Aug 2021 = 26.8 seconds (from averaged panel temperatures)
09 Aug 2021 = 24.7 seconds (from averaged panel temperatures)
10 Aug 2021 = 22.8 seconds (from averaged panel temperatures)
11 Aug 2021 = 21.1 seconds (from averaged panel temperatures)
12 Aug 2021 = 19.3 seconds (from averaged panel temperatures)

Special thanks to Terry VK5GU and Colin VK3HBF for their continued assistance with downloads this week.

AO-73 continues to maintain a mostly stable reversed spin rotational attitude about the Z-Z Axis. This last week AO-73 has noted to have a slight wobble about its unbalanced MOI as the Rotational Period slowly decreases.

73 de Colin VK5HI.

AO-73 : Funcube-1

Rotation Period

30 Jul 2021 = 62.6 seconds (from averaged panel temperatures)
31 Jul 2021 = 56.5 seconds (from averaged panel temperatures)
01 Aug 2021 = 52.8 seconds (from averaged panel temperatures)
02 Aug 2021 = 47.8 seconds (from averaged panel temperatures)
03 Aug 2021 = 42.1 seconds (from averaged panel temperatures)
04 Aug 2021 = 38.0 seconds (from averaged panel temperatures)
05 Aug 2021 = 35.4 seconds (from averaged panel temperatures)

Special thanks to Terry VK5GU and Colin VK3HBF for their continued assistance with downloads this week.

AO-73 continues to maintain a stable reversed spin rotational attitude about the Z-Z Axis.

73 de Colin VK5HI.

ISS SSTV experiment

Friday and Saturday August 6 – 7, 2021, Russian cosmonauts onboard the International Space Station will transmit SSTV images from the station on 145.800 MHz FM. They will use SSTV mode PD-120.
The transmissions are part of the Moscow Aviation Institute SSTV experiment (MAI-75) and will be sent via RS0ISS, the ham station in the Russian Zvezda (Service) module using a Kenwood TM-D710 transceiver.

The announced schedule is August 6, 10:50 UTC – 19:10 UTC and August 7, 09:50 UTC – 15:55 UTC. Dates and times are subject to change.

AO-73 : Funcube-1

Rotation Period

23 Jul 2021 = 134 seconds (from averaged panel temperatures)
24 Jul 2021 = 128 seconds (from averaged panel temperatures)
25 Jul 2021 = 108 seconds (from averaged panel temperatures)
26 Jul 2021 = 97.1 seconds (from averaged panel temperatures)
27 Jul 2021 = 86.6 seconds (from averaged panel temperatures)
28 Jul 2021 = 77.8 seconds (from averaged panel temperatures)
29 Jul 2021 = 68.3 seconds (from averaged panel temperatures)

Special thanks to Terry VK5GU and Colin VK3HBF for their continued assistance with downloads this week.

AO-73 continues to maintain a stable reversed spin rotational attitude about the Z-Z Axis.

73 de Colin VK5HI.

AO-73 : Funcube-1

Rotation Period

16 Jul 2021 = 198 seconds (from averaged panel temperatures)
17 Jul 2021 = 180 seconds (from averaged panel temperatures)
18 Jul 2021 = 164 seconds (from averaged panel temperatures)
19 Jul 2021 = 168 seconds (from averaged panel temperatures)
20 Jul 2021 = 173 seconds (from averaged panel temperatures)
21 Jul 2021 = 164 seconds (from averaged panel temperatures)
22 Jul 2021 = 183 seconds (from averaged panel temperatures)

Special thanks to Terry VK5GU and Colin VK3HBF for their continued assistance with downloads this week.

AO-73 has now assumed a stable reversed spin rotational attitude about the Z-Z Axis.

73 de Colin VK5HI.

AO-73 : Funcube-1

Rotation Period

09 Jul 2021 = 31.8 seconds (from averaged panel temperatures)
10 Jul 2021 = 46.3 seconds (from averaged panel temperatures)
11 Jul 2021 = 65.0 seconds (from averaged panel temperatures)
12 Jul 2021 = 380 seconds (from averaged panel temperatures)
13 Jul 2021 = 550 seconds (from WOD Solar panel temperatures)
14 Jul 2021 = 270 seconds (from averaged panel temperatures)
15 Jul 2021 = 230 seconds (from averaged panel temperatures)

Special thanks to Terry VK5GU and Colin VK3HBF for their continued assistance with downloads this week.
At the start of this monitoring period AO-73 continued to perform in an unstable spin attitude with AO-73 rotating about the Z-Z axis but with a variable rotation about AO-73’s offset Centre of Mass. As noted last week AO-73 the rotation period about the Centre of Mass had been noted to be in the range, 450 to 600 seconds.
On the 12th July the motion about the Centre of Mass “consolidated” as AO-73’s rotation about the Z-Z axis.
The graphic from the 5th July

The graphic from the 12th July

and the latest graphic from the 15th July

73 de Colin VK5HI.