GPS (Global Positioning System)-based inter-satellite baseline measurement method for flight of formed array around satellite

Abstract

The invention provides a GPS (Global Positioning System)-based inter-satellite baseline measurement method for flight of a formed array around a satellite. GPS receivers of two satellites (a satellite A and a satellite B) are used for receiving navigation satellite signals and respectively calculating to obtain positioning information. An inter-satellite communication device and an inter-satellite communication antenna array between the two satellites form an inter-satellite communication link for one-way communication, and the two satellites are respectively provided with an isospinning antenna array on the plus X-plane and the minus X-plane. The inter-satellite communication device of the satellite B is used for receiving GPS positioning information of the satellite B through an RS422 interface and modulating and amplifying the GPS positioning information of the satellite B into radio-frequency signals, and the radio-frequency signals are radiated to the whole space through the inter-satellite communication antenna. The inter-satellite communication device of the satellite A is used for receiving signals transmitted by the satellite B, demodulating to restore the original GPS measurement information of the satellite B, and transmitting the information to the GPS receiver of the satellite A through a CAN (Controller Area Network) bus. Relative positioning calculation is carried out in the GPS receiver of the satellite A, results are broadcast through the CAN bus, and thus, one inter-satellite baseline measurement is completed.

Description

technical field [0001] The invention relates to a satellite inter-satellite baseline measurement method. Background technique [0002] Small-scale satellite formation orbiting means that two or more satellites that are relatively close to each other maintain a specific formation configuration based on a certain point, and then fly around the earth with the same orbital period. Links work together to complete specific payloads such as InSAR and other high-precision measurement tasks. The InSAR formation has strict requirements on the baseline range, and the scale of the formation configuration is small, which puts forward higher requirements on the measurement accuracy of the relative position between two stars. The line connecting the centroids of the two satellites constitutes the inter-satellite baseline, and the actual measurement is the distance between the phase centers of the GPS antennas of the two satellites, which needs to be converted to obtain the distance betwee...

AI Technical Summary

Problems solved by technology

[0004] The problem solved by the technology of the present invention is: to overcome the deficiencies of the prior art, to provide a GPS-based high-precision baseline measurement method between satellites during the small-scale formation flying around, and to solve the problems before the formation flight, during the formation flight, and after the formation flight high-precision inter-satellite measurement problems, and provide necessary information for formation satellites to achieve autonomous control and maintain a stable configuration through these high-precision measurement data

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