AO-73 spin period

Spin Period
5 Apr 2019 = 35.8 Seconds (from averaged panel temperatures)
6 Apr 2019 = 43.1 Seconds (from averaged panel temperatures)
7 Apr 2019 = 50.7 Seconds (from averaged panel temperatures)
8 Apr 2019 = 53.0 Seconds (from averaged panel temperatures)
9 Apr 2019 = 52.5 Seconds (from averaged panel temperatures)
10 Apr 2019 = 51.5 Seconds (from averaged panel temperatures)
11 Apr 2019 = 48.9 Seconds (from averaged panel temperatures)
73 de Terry for Colin VK5HI.

AO-73 : Funcube – 1

Spin Period

22 Mar 2019 = 34.8 seconds (from averaged panel temperatures)
23 Mar 2019 = 32.5 seconds (from averaged panel temperatures)
24 Mar 2019 = 30.2 seconds (from averaged panel temperatures)
25 Mar 2019 = 28.3 seconds (from averaged panel temperatures)
26 Mar 2019 = 26.1 seconds (from averaged panel temperatures)
27 Mar 2019 = 24.2 seconds (from averaged panel temperatures)
28 Mar 2019 = 22.7 seconds (from averaged panel temperatures)

AO-73 is now spinning about the Z-Z axis with medium Nutation.

73 de Colin VK5HI.

AO-73 : Funcube-1

Spin Period

15 Mar 2019 = 58.1 seconds (from averaged panel temperatures)
16 Mar 2019 = 54.2 seconds (from averaged panel temperatures)
17 Mar 2019 = 50.5 seconds (from averaged panel temperatures)
18 Mar 2019 = 46.8 seconds (from averaged panel temperatures)
19 Mar 2019 = 43.6 seconds (from averaged panel temperatures)
20 Mar 2019 = 40.5 seconds (from averaged panel temperatures)
21 Mar 2019 = 37.4 seconds (from averaged panel temperatures)

AO-73 is now spinning about the Z-Z axis with medium Nutation.

73 de Colin VK5HI.

AO-73 : Funcube-1


Spin Period

08 Mar 2019 = 107.8 seconds (from averaged panel temperatures)
09 Mar 2019 = 95.4 seconds (from averaged panel temperatures)
10 Mar 2019 = 88.4 seconds (from averaged panel temperatures)
11 Mar 2019 = 79.3 seconds (from averaged panel temperatures)
12 Mar 2019 = 72.9 seconds (from averaged panel temperatures)
13 Mar 2019 = 66.5 seconds (from averaged panel temperatures)
14 Mar 2019 = 62.1 seconds (from averaged panel temperatures)

AO-73 is now spinning about the Z-Z axis with medium Nutation.

73 de Colin VK5HI.

AO-73 : Funcube-1

Spin Period

Corrected data for 15th to 21st February.

15 Feb 2019 = 23.0 seconds (from averaged panel temperatures)
16 Feb 2019 = 24.5 seconds (from averaged panel temperatures)
17 Feb 2019 = 32.5 seconds (from averaged panel temperatures)
18 Feb 2019 = 36.8 seconds (from averaged panel temperatures)
19 Feb 2019 = 48.1 seconds (from averaged panel temperatures)
20 Feb 2019 = 72.8 seconds (from averaged panel temperatures)
21 Feb 2019 = 103.4 seconds (from averaged panel temperatures)

22 Feb 2019 = 202.5 seconds (using Sun Sensors)
23 Feb 2019 = 245.0 seconds (from averaged panel temperatures) Tnx Terry VK5GU
24 Feb 2019 = 238.8 seconds (from averaged panel temperatures)
25 Feb 2019 = 224.4 seconds (from averaged panel temperatures)
26 Feb 2019 = 202.2 seconds (from averaged panel temperatures)
27 Feb 2019 = 159.1 seconds (from averaged panel temperatures)
28 Feb 2019 = 185.5 seconds (from averaged panel temperatures)

AO-73 is now spinning about the Z-Z axis with minimal Nutation.

73 de Colin VK5HI.

AO-73 Funcube-1

Spin Period

15 Feb 2019 = 17.4 seconds (from averaged panel temperatures)
16 Feb 2019 = 16.5 seconds (from averaged panel temperatures)
17 Feb 2019 = 17.4 seconds (from averaged panel temperatures)
18 Feb 2019 = 17.0 seconds (from averaged panel temperatures)
19 Feb 2019 = 17.6 seconds (from averaged panel temperatures)
20 Feb 2019 = 18.6 seconds (from averaged panel temperatures)
21 Feb 2019 = 21.3 seconds (from averaged panel temperatures)

AO-73 is now spinning about the Z-Z axis with moderate Nutation.

73 de Colin VK5HI.

AO-73 : Funcube 1

Spin Period

08 Feb 2019 = 17.4 seconds (from averaged panel temperatures)
09 Feb 2019 = 16.5 seconds (from averaged panel temperatures)
10 Feb 2019 = 17.4 seconds (from averaged panel temperatures)
11 Feb 2019 = 17.0 seconds (from averaged panel temperatures)
12 Feb 2019 = 17.6 seconds (from averaged panel temperatures)
13 Feb 2019 = 18.6 seconds (from averaged panel temperatures)
14 Feb 2019 = 21.3 seconds (from averaged panel temperatures)

On the 12th February AO-73 started to tumble.
It is now tumbling in a complex rotational sequence suggesting “spin reversal” but that is not actually occurring.

73 de Colin VK5HI.

AO-73 : Funcube 1

Spin Period

Thanks to Terry VK5GU for download and analysis and Colin VK3HBF for his download support to Terry while I was on holidays.

25 Jan 2019 = 36.5 seconds (from averaged panel temperatures)
26 Jan 2019 = 34.1 seconds (from averaged panel temperatures)
27 Jan 2019 = 32.4 seconds (from averaged panel temperatures)
28 Jan 2019 = 30.4 seconds (from averaged panel temperatures)
29 Jan 2019 = 28.1 seconds (from averaged panel temperatures)
30 Jan 2019 = 26.4 seconds (from averaged panel temperatures)
31 Jan 2019 = 24.7 seconds (from averaged panel temperatures)

AO-73 is spinning about the Z-Z axis with minimal Nutation.

73 de Colin VK5HI.

AO-73 Funcube-1

Spin Period

04 Jan 2019 = 31.5 seconds (from sun sensors)
05 Jan 2019 = 45.0 seconds (from sun sensors)
06 Jan 2019 = 90.0 seconds (from sun sensors)
07 Jan 2019 = 96.5 seconds (from sun sensors)
08 Jan 2019 = 120.2 seconds (from sun sensors)
09 Jan 2019 = 176.3 seconds (from averaged panel temperatures)
10 Jan 2019 = 114.8 seconds (from averaged panel temperatures)

This week’s change back to Educational Mode has seen a marked change in the Spin Period.
AO-73 is spinning about the Z-Z axis with minimal Nutation.

73 de Colin VK5HI.

AO-73 Funcube-1

Spin Period

28 Dec 2018 = 25.5 seconds (from sun sensors)
29 Dec 2018 = 27.5 seconds (from sun sensors)
30 Dec 2018 = 28.5 seconds (from sun sensors)
31 Dec 2018 = 34.0 seconds (from sun sensors)
01 Jan 2019 = 39.5 seconds (from sun sensors)
02 Jan 2019 = 40.8 seconds (from sun sensors) Tnx Colin VK3HBF.
03 Jan 2019 = 36.0 seconds (from sun sensors)

For the first three days AO-73 continued to take turns rotating about a different axis.
It then commenced rotating about the normal Z-Z axis, with Nutation.
Over VK it has been rotating with short term reversed spin from the flip cycle.
Due to the aliasing noted in previous analysis of the WOD’s and the gaps in the current WOD
uploads I have been unable to quantify how far into the pass the reverse spin continues.

73 de Colin VK5HI.