Formation satellite relative orbit determination method facilitating satellite-borne on-orbit real-time processing

Abstract

The invention discloses a formation satellite relative orbit determination method facilitating satellite-borne on-orbit real-time processing and belongs to the field of satellite formation relative navigation. According to the method, a GPS / BDS broadcast ephemeris and a simplified relative kinetic model are used, the in-orbit real-time processing is carried out on GPS / BDS double-frequency observation data of formation satellites, in consideration of limited computing resources of a satellite-borne processor, an operation mode of dynamic orbit prediction matched with orbit interpolation is designed, a core complex data processing process is realized in multiple steps in a time-sharing manner to reduce the computing time consumption of a single epoch, and high-precision absolute and relativeorbit results of the formation satellites with adjustable frequencies can be output. The method is suitable for inter-satellite formation with a large inter-satellite distance range, a smooth navigation result meeting certain precision requirements still can be continuously output under the condition that GPS / BDS signals are interrupted, and the method has the advantages of high orbit determination precision, good stability, low requirement for the performance of the satellite-borne processor, easy engineering achievement and the like.

Description

technical field [0001] The invention belongs to the technical field of satellite formation relative navigation, and more particularly relates to a GPS / BDS relative orbit determination method for formation satellites that is easy to process on-orbit and in real time. Background technique [0002] Satellite formation flight is a very hot research field in the aerospace industry at home and abroad in recent years. It has been widely used in scientific tasks such as distributed radar interferometry, time-varying earth's gravity field measurement, marine environment monitoring, and aerospace military reconnaissance. It is a representative application Including foreign GRACE-A / B, TerraSAR / TanDEM, SWARM-A / B / C and domestic practice No. 9 A / B, Exploration No. 4 A / B, Environment No. 1 A / B / C, etc. [0003] The determination of high-precision absolute orbits and relative baselines of satellites and their formation satellites is the key to completing the flight mission of formation satel...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention proposes a GPS / BDS relative orbit determination method for formation satellites that is easy to be processed on-orbit and real-time on-orbit, thereby solving the problem of existing satellites that are suitable for practical application of on-orbit engineering. The technical problem that the relative orbit determination method of real-time formation satellites cannot take into account both high precision and real-time performance

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