AO-73 : Funcube – 1

Spin Period

27 Mar 2020 = 17.3 seconds (from averaged panel temperatures)
28 Mar 2020 = 17.7 seconds (from averaged panel temperatures)
29 Mar 2020 = 18.2 seconds (from averaged panel temperatures)
30 Mar 2020 = 19.3 seconds (from averaged panel temperatures)
31 Mar 2020 = 21.4 seconds (from averaged panel temperatures)
01 Apr 2020 = 23.1 seconds (from averaged panel temperatures)
02 Apr 2020 = 26.9 seconds (from averaged panel temperatures)

AO-73 continues to spin in the reverse direction.

73 de Colin VK5HI.

AO-73 : Funcube-1

Spin Period

Thanks to Terry VK5GU for his assistance for his downloading and analysis during my absence over the last two weeks.

20 Mar 2020 = 22.0 seconds (from averaged panel temperatures)
21 Mar 2020 = 20.9 seconds (from averaged panel temperatures)
22 Mar 2020 = 19.6 seconds (from averaged panel temperatures)
23 Mar 2020 = 18.2 seconds (from averaged panel temperatures)
24 Mar 2020 = 17.3 seconds (from averaged panel temperatures)
25 Mar 2020 = 16.7 seconds (from averaged panel temperatures)
26 Mar 2020 = 17.3 seconds (from averaged panel temperatures)

AO-73 has in recent days has again entered a tumbling phase.
On the 26th March it was noted to be spinning in the reverse direction.

73 de Colin VK5HI.

Latest Figures:
Saturday 13 Mar 2020 = 40.9 seconds (from averaged panel temperatures)
Sunday 14 Mar 2020 = 37.3 seconds (from averaged panel temperatures)
Monday 15 Mar 2020 = 34.2 seconds (from averaged panel temperatures)
Tuesday 16 Mar 2020 = 31.3 seconds (from averaged panel temperatures)
Wednesday 17 Mar 2020 = 28.6 seconds (from averaged panel temperatures)
Thursday 18 Mar 2020 = 26.2 seconds (from averaged panel temperatures)
Friday 19 Mar 2020 = 24.3 seconds (from averaged panel temperatures)

73 de Terry VK5GU for Colin VK5HI.

Spin Period
06 Mar 2020 = 79.9 seconds (from averaged panel temperatures)
07 Mar 2020 = 79.9 seconds (from averaged panel temperatures)
08 Mar 2020 = 65.4 seconds (from averaged panel temperatures)
09 Mar 2020 = 59.5 seconds (from averaged panel temperatures)
10 Mar 2020 = 54.0 seconds (from averaged panel temperatures)
11 Mar 2020 = 49.1 seconds (from averaged panel temperatures)
12 Mar 2020 = 44.6 seconds (from averaged panel temperatures)

73 de Terry VK5GU for Colin VK5HI.

AO-73 : Funcube-1

Spin Period

28 Feb 2020 = 159.8 seconds (from averaged panel temperatures)
29 Feb 2020 = 179.7 seconds (from averaged panel temperatures)
01 Mar 2020 = 147.9 seconds (from averaged panel temperatures)
02 Mar 2020 = 120.8 seconds (from averaged panel temperatures)
03 Mar 2020 = 109.8 seconds (from averaged panel temperatures)
04 Mar 2020 = 98.1 seconds (from averaged panel temperatures)
05 Mar 2020 = 88.8 seconds (from averaged panel temperatures)

AO-73 continues to rotate in a X+, Y+, X-, Y- direction, with minimal Nutation.

73 de Colin VK5HI.

AO-73 : Funcube-1

Spin Period

21 Feb 2020 = 496.5 seconds (from averaged panel temperatures)
22 Feb 2020 = 390.0 seconds (from averaged panel temperatures)
23 Feb 2020 = 332.0 seconds (from averaged panel temperatures)
24 Feb 2020 = 303.3 seconds (from averaged panel temperatures)
25 Feb 2020 = 254.5 seconds (from averaged panel temperatures)
26 Feb 2020 = 220.9 seconds (from averaged panel temperatures)
27 Feb 2020 = 197.5 seconds (from averaged panel temperatures)

AO-73 continues to rotate in a X+, Y+, X-, Y- direction, in a stable motion.

73 de Colin VK5HI.

AO-73 : Funcube-1

Spin Period

13 Feb 2020 = 388.0 seconds (from Sun Sensor data)
14 Feb 2020 = 411.4 seconds (from Sun Sensor data)
15 Feb 2020 = 406.6 seconds (from Sun Sensor data)
16 Feb 2020 = 576.0 seconds (from Sun Sensor data)
17 Feb 2020 = 680.0 seconds (from Sun Sensor data)
18 Feb 2020 = 656.0 seconds (from Sun Sensor data)
19 Feb 2020 = 968.0 seconds (from averaged panel temperatures)
20 Feb 2020 = 683.0 seconds (from averaged panel temperatures)

This week’s analysis has been extremely challenging.
Also reviewed last weeks results and have updated 13th February.
AO-73 again rotating in normal direction, X+, Y+, X-, Y-.

73 de Colin VK5HI.

AO-73 : Funcube-1

Spin Period

07 Feb 2020 = 34.5 seconds (from averaged panel temperatures)
08 Feb 2020 = 43.1 seconds (from averaged panel temperatures)
09 Feb 2020 = 52.6 seconds (from averaged panel temperatures)
10 Feb 2020 = 41.8 seconds (from averaged panel temperatures)
11 Feb 2020 = 47.5 seconds (from averaged panel temperatures)
12 Feb 2020 = 135.6 seconds (from averaged panel temperatures)
13 Feb 2020 = 48.5 seconds (from averaged panel temperatures)

This last week AO-73 has continued to rotate with reversed spin rotation.
During a number of passes visible over VK it was noted the spin oscillating between the normal and reversed spin direction. AO-73 continues to tumble.

73 de Colin VK5HI.

AO-73 : Funcube-1

Spin Period

31 Jan 2020 = 16.6 seconds (from averaged panel temperatures)
01 Feb 2020 = 18.4 seconds (from averaged panel temperatures)
02 Feb 2020 = 19.2 seconds (from averaged panel temperatures)
03 Feb 2020 = 21.0 seconds (from averaged panel temperatures)
04 Feb 2020 = 23.1 seconds (from averaged panel temperatures)
05 Feb 2020 = 24.4 seconds (from averaged panel temperatures)
06 Feb 2020 = 28.2 seconds (from averaged panel temperatures)

During the week prior to the 31st January AO-73 started to tumble with increased daily levels of tumble. On the 31st January AO-73 reversed spin rotation for 3 days, reverted back to normal for one day and has been in reversed spin rotation for the last 3 days of this reporting week.
Suffice to say AO-73 continues to tumble.

73 de Colin VK5HI.

AO-73 : Funcube-1

Spin Period
Many thanks to Terry for his downloading and analysis during my time away from the home QTH.
Greatly appreciate his assistance.

24 Jan 2020 = 20.5 seconds (from averaged panel temperatures)
25 Jan 2020 = 19.2 seconds (from averaged panel temperatures)
26 Jan 2020 = 18.1 seconds (from averaged panel temperatures)
27 Jan 2020 = 16.8 seconds (from averaged panel temperatures)
28 Jan 2020 = 15.8 seconds (from averaged panel temperatures)
29 Jan 2020 = 15.0 seconds (from averaged panel temperatures)
30 Jan 2020 = 15.8 seconds (from averaged panel temperatures)

73 de Colin VK5HI.
Spin Period

16 Jan 2020 = 33.4 seconds (from averaged panel temperatures)
17 Jan 2020 = 30.8 seconds (from averaged panel temperatures)
18 Jan 2020 = 28.6 seconds (from averaged panel temperatures)
19 Jan 2020 = 26.6 seconds (from averaged panel temperatures)
20 Jan 2020 = 24.4 seconds (from averaged panel temperatures)
21 Jan 2020 = 23.0 seconds (from averaged panel temperatures)
22 Jan 2020 = 21.2 seconds (from averaged panel temperatures)

73 de Terry VK5GU for Colin VK5HI.
Spin Period

09 Jan 2020 = 60.1 seconds (from averaged panel temperatures)
10 Jan 2020 = 57.8 seconds (from averaged panel temperatures)
11 Jan 2020 = 54.7 seconds (from averaged panel temperatures)
12 Jan 2020 = 48.9 seconds (from averaged panel temperatures)
13 Jan 2020 = 44.9 seconds (from averaged panel temperatures)
14 Jan 2020 = 41.7 seconds (from averaged panel temperatures)
15 Jan 2020 = 36.1 seconds (from averaged panel temperatures)

73 de Terry VK5GU for Colin VK5HI.

AO-73 : Funcube-1

Spin Period
03 Jan 2020 = 96.6 seconds (from averaged panel temperatures)
04 Jan 2020 = 88.5 seconds (from averaged panel temperatures)
05 Jan 2020 = 82.7 seconds (from averaged panel temperatures)
06 Jan 2020 = 76.1 seconds (from averaged panel temperatures)
07 Jan 2020 = 70.3 seconds (from averaged panel temperatures)
08 Jan 2020 = 65.3 seconds (from averaged panel temperatures)
08 Jan 2020 = 60.1 seconds (from averaged panel temperatures)

As AO-73 has been slowly increasing its spin rate in recent weeks (lower spin period) this week has shown a small increase in Nutation due to AO-73’s offset Centre of Gravity.
It is still rotating about the Z-Z axis.

73 de Colin VK5HI.

AO-73 : Funcube-1

Spin Period
27 Dec 2019 = 127.8 seconds (from averaged panel temperatures)
28 Dec 2019 = 124.8 seconds (from averaged panel temperatures)
29 Dec 2019 = 146.6 seconds (from averaged panel temperatures)
30 Dec 2019 = 144.3 seconds (from averaged panel temperatures)
31 Dec 2019 = 129.8 seconds (from averaged panel temperatures)
01 Jan 2020 = 119.4 seconds (from averaged panel temperatures)
02 Jan 2020 = 104.4 seconds (from averaged panel temperatures)

AO-73 continues to spin about the Z-Z axis with minimal Nutation.

73 de Colin VK5HI.