AO-73 : Funcube-1

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Rotation Period

10 Aug 2021 = 24.3 seconds (from averaged panel temperatures)
11 Aug 2021 = 26.3 seconds (from averaged panel temperatures)
12 Aug 2021 = 32.1 seconds (from averaged panel temperatures)
13 Aug 2021 = 39.3 seconds (from averaged panel temperatures)
14 Aug 2021 = 44.5 seconds (from averaged panel temperatures)
15 Sep 2021 = 50.9 seconds (from averaged panel temperatures)
16 Sep 2021 = 50.5 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 complex attitude the result of normal spin rotation about the Z-Z axis with the Z-Z axis slowly rotating about AO-73’s unbalanced Moment of Inertia.

AO-73 will enter a short period of continuous solar illumination commencing 23rd September.
The AMSAT-UK Team has placed AO-73 in High Power Telemetry download mode for this short period of continuous sun.

73 de Colin VK5HI.

AO-73 : Funcube-1

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Rotation Period

03 Aug 2021 = 20.8 seconds (from averaged panel temperatures)
04 Aug 2021 = 20.1 seconds (from averaged panel temperatures)
05 Aug 2021 = 18.4 seconds (from averaged panel temperatures)
06 Aug 2021 = 19.7 seconds (from averaged panel temperatures)
07 Aug 2021 = 19.7 seconds (from averaged panel temperatures)
08 Sep 2021 = 20.2seconds (from averaged panel temperatures)
09 Sep 2021 = 22.2 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 complex attitude the result of normal spin rotation about the Z-Z axis with the Z-Z axis slowly rotating about AO-73’s unbalanced Moment of Inertia. Over the last 3 days the rotation about the unbalanced MOI has noted to have become increasingly significant.
The most recent download over VK at 0623utc 10th September by Colin VK3HBF highlighting that attitude is as follows :-

73 de Colin VK5HI.

AO-73 : Funcube-1

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Rotation Period

27 Aug 2021 = 31.4 seconds (from averaged panel temperatures)
28 Aug 2021 = 29.6 seconds (from averaged panel temperatures)
29 Aug 2021 = 27.8 seconds (from averaged panel temperatures)
30 Aug 2021 = 26.5 seconds (from averaged panel temperatures)
31 Aug 2021 = 25.0 seconds (from averaged panel temperatures)
01 Sep 2021 = 23.1 seconds (from averaged panel temperatures)
02 Sep 2021 = 21.5 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 complex attitude the result of normal spin rotation about the Z-Z axis with the Z-Z axis slowly rotating about AO-73’s unbalanced Moment of Inertia.

73 de Colin VK5HI.

AO-73 : Funcube-1

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Rotation Period

20 Aug 2021 = 20.1 seconds (from averaged panel temperatures)
21 Aug 2021 = 21.3 seconds (from averaged panel temperatures)
22 Aug 2021 = 27.5 seconds (from averaged panel temperatures)
23 Aug 2021 = 32.4 seconds (from averaged panel temperatures)
24 Aug 2021 = 33.9 seconds (from averaged panel temperatures)
25 Aug 2021 = 33.4 seconds (from averaged panel temperatures)
26 Aug 2021 = 32.5 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 complex attitude the result of normal spin rotation about the Z-Z axis with the Z-Z axis slowly rotating about AO-73’s unbalanced Moment of Inertia.

73 de Colin VK5HI.

CUTE telemetry beacon description

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In preparation for the CUTE cubesat launch on September 16, 2021, I’d like to get the CUTE beacon packet contents published prior to launch.

CUTE_beacon_definition

Karen Bryant
University of Colorado

CUTE is a 6U CubeSat whose bus and primary subsystems (including the attitude control system, GPS receiver, communication systems, electrical power system, and solar array) are provided by Blue Canyon Technologies.
CUTE will have a 1-year mission life time and will launch in 2020 and use near-ultraviolet (NUV) transmission spectroscopy from 255 to 330 nanometers (nm) to characterize the composition and mass-loss rates of exoplanet atmospheres. CUTE measures how the NUV light from the host star is changed as the exoplanet transits in front of the star and passes through the planet’s atmospheres. CUTE’s spectrally resolved lightcurve will provide constraints on the composition and escape rates of these atmospheres, and may provide the first concrete evidence for magnetic fields on extrasolar planets.
The keys to unlocking the diagnostic potential of these systems are spectral coverage in the appropriate bandpass and the ability to follow the systems for several orbital periods. CUTE is designed to provide exactly that – low resolution spectroscopy of critical atmospheric tracers (Fe II, Mg II, Mg I, OH) that are inaccessible from the ground, and a dedicated mission architecture that enables the survey required to characterize atmospheric structure and variability on these worlds.
CUTE was constructed at the University of Colorado, Boulder and the Laboratory for Atmospheric and Space Physics (LASP).

https://lasp.colorado.edu/home/cute/what-is-a-cubesat/

AO-73 : Funcube-1

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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

DK3WNLeave a comment

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

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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.