A method for orbit design of low-orbit satellites for fast revisiting of discrete targets

Abstract

Disclosed is a low-earth-orbit satellite orbit designing method for quickly revisiting discrete targets. The method includes (1), determining an inclination angle of a satellite orbit, wherein the inclination angle is not lower than the highest latitude Lmax of a ground target; (2), selecting a round orbit as the satellite orbit, wherein eccentricity ratio is 0; (3), executing a reconnaissance mission according to the ground target, determining a regression cycle of the orbit, utilizing the regression cycle to determine a semi-major axis of the satellite orbit, and then determining height of the orbit; (4), according to corresponding orbit ascending node longitude when sub-satellite points of an orbit ascending section and an orbit descending section of the satellite orbit pass the ground target, respectively determining ideal satellite orbit ascending node longitude of the orbit ascending section and the orbit descending section, performing optimization aiming at enabling the sum of designed satellite orbit ascending node longitude and a difference value of the ideal satellite orbit ascending node longitude of the orbit ascending section and the orbit descending section of the ground target, and determining ascending node longitude of the satellite orbit to be L; (5), utilizing the orbit inclination angle, the round orbit and the eccentricity ratio thereof, the orbit height and the ascending node longitude of the satellite orbit to complete designing of the satellite orbit.

Description

technical field [0001] The invention relates to a method for designing an orbit configuration of a low-orbit satellite constellation network, which is suitable for designing an optimized constellation network orbit configuration for a plurality of specific ground targets discretely distributed in different locations around the world, so as to achieve The number of satellites provides the fastest repeatable reconnaissance of these discrete ground targets. Background technique [0002] Since the British ClarkAC first proposed the concept of satellite constellation networking in the 1940s, a large number of documents have been published on the design of global coverage constellation networking, and have been applied in engineering practice, such as the US GPS navigation constellation, Iridium communication Constellation etc. A lot of research has also been done on constellation networking issues covering key areas. Russia's Molniya communication constellation and my country's ...

AI Technical Summary

Problems solved by technology

[0007] For the satellite network configuration design method with the above characteristics that can quickly revisit discrete targets, there are no relevant public literature reports or patent reports at home and abroad.

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