Sun synchronous regression orbit earth observation mixed constellation design method

Abstract

The invention provides a sun synchronous regression orbit earth observation mixed constellation design method, which comprises the following steps of: designing a plurality of earth observation satellites into a mixed constellation, and deducing the relationship between satellite track offset and phase difference by analyzing track change caused by satellite orbit motion and taking the geographic longitude difference of a satellite descending node as a variable, and therefore, according to different requirements for time resolution, observation target constraint and the like in an actual observation task, two typical mixed constellation methods of coplanar and different planes are designed, and the observation application requirement is met. According to the method, constellation design can be simply, conveniently and rapidly completed, a large amount of numerical calculation is avoided, and the difficulty and complexity of hybrid constellation design and construction work are reduced; and the hybrid constellation constructed by the method is stable in configuration, avoids frequent control, does not increase workload, does not generate extra propellant consumption, is safe and convenient, and is convenient for engineering application.

Description

technical field [0001] The invention belongs to the field of aerospace measurement and control, and relates to a multi-satellite earth observation hybrid constellation method with different purposes and different orbital characteristics. Background technique [0002] Earth observation satellites have a wide range of observations and are not subject to geographical restrictions, and can accomplish tasks that are difficult to accomplish by traditional means. Such satellites often use sun-synchronous homing orbits and operate in low earth orbits. The local time of the descending node and the angular distance between two successive descending nodes on the equator are important parameters for the sun-synchronous orbit and the returning orbit, respectively. Different local times of the nodes will form different orbital planes and different drift speeds; different angular distances will Form different regression characteristics. The orbital characteristics are mainly the local ti...

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Problems solved by technology

Existing literature related to mixed constellations mostly studies the mixing of different types of orbits, such as high-orbit GEO+medium-orbit MEO. The two types of orbital motions are very different, and numerical simulation methods are often used for effect analysis. The method is different. Suitable for on-orbit LEO networking requirements; some documents related to low-orbit LEO space hybrid constellations, such as "Optimized Design of Hybrid Satellite Constellation Based on Improved Particle Swarm Optimization Algorithm", the low-orbit part uses Walker with the same orbital height and inclination Constellation methods are not suitable for on-orbit LEO networking requirements; some literature, such as "Regional Coverage Mixed Constellation Design", although the research objects are all low-orbit LEO space, the orbit types are not consistent, which are sun-synchronous orbit and non-synchronous orbit. Sun-synchronous orbit, the method is also not suitable for on-orbit LEO networking requirements

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