Phase-space estimate of satellite coverage time
This note derives a phase-space estimate of the overlap in satellite coverage and evaluates its impact on the time for a constellation to cover some specified area. The satellites' motion is treated as random in the calculation of the overlaps. Enough passes are prescribed to assure that an adequate probability of observing each area is accumulated. For 0.9--0.99 probabilities of coverage, overlaps increase the time for coverage by factors of 2--4 over no-overlap estimates. This model also gives the probability of different vintages of data. If a given constellation covers the whole Earth in the no-overlap time T{sub 0}, the average vintage of the data over the earth will then be the average , which is essentially the same as T{sub 0}. Overlap over the poles might be wasteful, but overlap in areas of interest by inclined orbits just causes measurements to be more current in areas of interest.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5566489
- Report Number(s):
- LA-12298-MS; ON: DE92013555
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BALLISTIC MISSILE DEFENSE
MILITARY STRATEGY
SATELLITES
PHASE SPACE
DETECTION
PROBABILITY
SURFACE AREA
TIME DEPENDENCE
MATHEMATICAL SPACE
NATIONAL DEFENSE
SPACE
SURFACE PROPERTIES
450500* - Military Technology
Weaponry
& National Defense- Strategic Defense Initiative- (1990-)