Statistics – Computation
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.606u&link_type=abstract
IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,
Statistics
Computation
Scientific paper
A geometric analysis of communication systems based on a satellite constellation and set of ground stations is considered. Routing algorithms for communication with "user - satellite - ground station - satellite -... ground station - satellite-user" dynamic networks are presented. Geometric connectivity conditions of such networks are described. The conditions are based on a presentation satellite constellation coverage statistics as covering functions versus geographical latitude (a geocentric angle of the smallest circle that encloses the subsatellite points no less than a number of satellites at anytime). Methods for definition of guaranteed geographical service areas are proposed. Placement problem of ground stations is also discussed. An iterative computation algorithm for coverage area of satellite in elliptic orbit with critical inclination and perigee in a hemisphere is described. Analysis examples of dynamic networks and service areas for the GLOBALSTAR (circular orbits) and MOLNIYA-ZOND (elliptic orbits) constellations are presented.
Doniants V. N.
Ulybyshev Yu. P.
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