Extended 2-D Map for Satellite Coverage Analysis Considering Elevation-Angle Constraint | IEEE Journals & Magazine | IEEE Xplore

Extended 2-D Map for Satellite Coverage Analysis Considering Elevation-Angle Constraint


Abstract:

The analysis of satellite coverage to determine the visibility of ground targets from satellites has been extensively studied, particularly through geometric-based method...Show More

Abstract:

The analysis of satellite coverage to determine the visibility of ground targets from satellites has been extensively studied, particularly through geometric-based methods that provide analytical results. However, there exists a key limitation that these methods do not precisely consider the elevation-angle constraint. To address this limitation, this article provides a geometric approach for computing the visibility considering the elevation-angle constraint. First, the mathematical model of the elevation-angle constraint is established, and the elevation-element equation describing the geometrical relationship between satellite and ground target satisfying the elevation-angle constraint is deduced. Additionally, based on the analytical solution to the elevation-element equation, a two-dimensional map, named the elevation mapping, is proposed. Subsequently, the presented geometric approach is established by incorporating the elevation-angle constraint model into the satellite-target visibility model, and an extended field mapping is proposed to rapidly compute access intervals while adhering to the elevation-angle constraint. Specifically, it achieves this by converting the task into a straightforward problem involving the intersection of a set of lines with the time-invariant regions generated by the extended field mapping. Furthermore, the extended constellation field mapping is presented, which can simplify the multisatellite coverage problem into an easier single-satellite coverage problem, enabling it to solve the constellation coverage problem considering elevation-angle constraints analytically and rapidly. Simulation results demonstrate that the proposed intuitive methodology can accurately and rapidly compute access intervals while considering the elevation-angle constraint, which suggests its wide applications in satellite coverage analysis.
Published in: IEEE Transactions on Aerospace and Electronic Systems ( Volume: 60, Issue: 5, October 2024)
Page(s): 6531 - 6549
Date of Publication: 10 June 2024

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