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Size: 1591
Comment:
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Size: 1588
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 6: | Line 6: |
| || time || avoidance || move and stop || | || time || avoidance || move and stop || |
| Line 19: | Line 19: |
| If the wavelength is 8mm and the ground antenna is 1 meter across, the aperture is about 0.5 degrees. So, in 1 month a thinsat can move from one aperture to the next, and in 20 months it can move anywhere in the m288 orbit. If it tilts and reduces light pressure, it can move faster, tilting back to full sunlight for position checks. This is not spectacular speed, but it is better than most satellites can manage. | If the wavelength is 8mm and the ground antenna is 1 meter across, the aperture is about 0.5 degrees. So, in 1 month a thinsat can move from one aperture to the next, and in 20 months it can move anywhere in the m288 orbit. If it tilts and reduces light pressure, it can move faster, tilting back to full sunlight for position checks. This is not spectacular speed, but it is better than most satellites can manage. |
Local Maneuvering
Thinsat displacement acceleration is approximately 0.6 microns per second squared. Displacement distance without stopping (avoiding a collider, for example) is 0.3 t2 microns (t in seconds). Moving and stopping is slower, 0.15 t2 We can control the electrochromic thrusters in small increments, and within fractions of a second, so our maneuvering accuracy can be a few nanometers, much better than our measurement accuracy.
time |
avoidance |
move and stop |
|
1 second |
0.3 um |
0.15 um |
|
1 minute |
0.11 mm |
0.05 mm |
|
5 minutes |
2.7 mm |
1.35 mm |
|
10 minutes |
11 mm |
5.4 mm |
|
20 minutes |
43 mm |
22 mm |
|
1 hour |
39 cm |
19 cm |
|
4 hours |
6.2 m |
3.1 m |
|
1 day |
224 m |
112 m |
|
1 week |
|
5.5 km |
degrees of orbit |
1 month |
|
104 km |
0.46 |
1 year |
|
14900 km |
67 |
If the wavelength is 8mm and the ground antenna is 1 meter across, the aperture is about 0.5 degrees. So, in 1 month a thinsat can move from one aperture to the next, and in 20 months it can move anywhere in the m288 orbit. If it tilts and reduces light pressure, it can move faster, tilting back to full sunlight for position checks. This is not spectacular speed, but it is better than most satellites can manage.