Design of satellite constellations with continuous coverage on elliptic orbits of Molniya type

Details Design of satellite constellations with continuous coverage on elliptic orbits of Molniya type Design of satellite constellations with continuous coverage on elliptic orbits of Molniya type

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cosre..47..310u&link_type=abstract

Cosmic Research, Volume 47, Issue 4, pp.310-321

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45.40.Gj

Scientific paper

New methods of choosing the structures of satellite constellations (SC) on elliptical orbits of the Molniya type are presented. The methods, using critical inclination and putting the orbit apogee in the Earth’s hemisphere with an area of continuous coverage, are based on geometrical analysis of two-dimensional representation of the coverage conditions and SC motion in the space of inertial longitude of the orbit ascending node and time. The coverage conditions are represented in the form of a certain region. Dynamics of all satellites in this space is represented by uniform motion along a straight line approximately parallel to the ordinate axis, while the satellite system forms a grid. The problem of choosing a minimal (as far as the number of satellites is concerned) SC configuration can be formulated as a search for the most sparse grid. The contemporary advanced methods of computational geometry serve as an algorithmic basis for the problem solution. Design of SC for continuous coverage of latitude belts with the use of kinematically regular systems is considered. A method of analyzing single-track systems for continuous coverage of arbitrary geographic regions is described, which makes a region at any time instant observable by at least one satellite of the system. As an example, SC on elliptical orbits are considered with periods of ˜4, 12, and 24 hours.

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