Method for evaluating compatibility between low-orbit navigation system and medium-high orbit navigation system

Abstract

The invention relates to a method for evaluating compatibility between a low-orbit navigation system and a medium-high orbit navigation system; the method comprises the steps of 1) establishing a low-orbit navigation system satellite constellation, a medium-high orbit navigation system satellite constellation by utilizing MATLAB and STK software, and establishing a ground navigation receiver; 2) traversing all satellites of the two system satellite constellations, and calculating the satellite-to-ground relative distance between the satellites and the receiver; 3) calculating the Doppler frequency shift of the satellite signals of the low-orbit navigation system and the medium-high orbit navigation system; 4) calculating a spectral separation coefficient between signals according to the power spectral density and the corresponding Doppler frequency shift of the two signals; 5) calculating an interference signal to ground power; 6) calculating equivalent carrier-to-noise ratio attenuation at the moment; and 7) calculating the equivalent carrier-to-noise ratio attenuation values of all traversed elements in the whole simulation period, and enabling the interference values of all thestations to be subjected to compatibility evaluation. Compared with the prior art, the method has the advantages that a more real interference result can be obtained, and the deviation between an analysis result and a real condition is reduced.

Description

technical field [0001] The invention relates to the technical field of satellite navigation and positioning, in particular to a compatibility evaluation method between a low-orbit navigation system and a mid-high orbit navigation system. Background technique [0002] Global Navigation Satellite System (GNSS), especially the GPS system of the United States, the GLONASS system of Russia, the Galileo system of Europe and the Beidou system of China, have been widely used in the world and provide navigation and positioning services for users in various fields . With the promotion of applications, the current high-precision surveying and mapping, precision agriculture, transportation and logistics transportation, aviation management and other fields have higher and higher requirements for the accuracy, availability, and integrity of navigation and positioning. The traditional GNSS system can no longer meet the needs. Using low-orbit satellites Due to its own characteristics, the ...

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