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⇤ ← Revision 1 as of 2010-04-19 04:55:05
Size: 1214
Comment:
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Size: 1213
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 6: | Line 6: |
| || 1 second || 2 microns || || | || 1 second || 2 microns || || |
= Local Maneuvering=
Server sat displacement distance versus time is approximately @@ 0.1 a t ^ 2 @@, where @@ a @@ is the peak acceleration from light pressure. If the peak acceleration is 20 microns per second squared, then a server sat can maneuver these distances in the given period of time:
time |
distance |
degrees of orbit |
1 second |
2 microns |
|
1 minute |
7 millimeters |
|
5 minutes |
18 centimeters |
|
20 minutes |
3 meters |
|
1 hour |
26 meters |
|
4 hours |
400 meters |
|
24 hours |
15 kilometers |
0.07 degrees |
3 days |
135 kilometers |
0.6 degrees |
1 week |
730 kilometers |
3.3 degrees |
1 month |
14K kilometers |
63 degrees |
52 days |
40K kilometers |
180 degrees |
If the wavelength is 8mm and the ground antenna is 500mm across, the aperture is about 0.5 degrees. So, in 3 days a serversat can move from one aperture to the next, and in 52 days it can move anywhere in the m288 orbit.