Space signal accuracy evaluation method and system

Abstract

The invention provides a space signal accuracy evaluation method and system. The method comprises the steps that after an evaluation signal is received, a configuration file is called, and evaluation time is read from the configuration file; according to broadcast ephemeris acquired in real time, the first satellite position and the first satellite clock error of each satellite corresponding to the evaluation time are calculated; precision ephemeris is used to acquire the second satellite position and the second satellite clock error of each satellite corresponding to the evaluation time through interpolation; the difference between the first satellite position and the second satellite position is acquired to acquire the position difference; the difference between the first satellite clock error and the second satellite clock error is acquired to acquire the clock error difference; a user distance-measuring error is calculated according to the position difference and the clock error difference; a number of user distance-measuring errors in a preset period of time are acquired; and statistical analysis is carried out on a number of user distance-measuring errors to acquire an error statistical result. The broadcast ephemeris acquired in real time and the provided ultra-fast precision ephemeris are used to effectively solve the problem of hysteresis of traditional post-evaluation.

Description

technical field

[0001] The technical field of satellite space signal evaluation of the present invention particularly relates to a space signal accuracy evaluation method and system. Background technique

[0002] The global continuous monitoring and evaluation system monitors and evaluates the operating status and main performance indicators of the Beidou satellite navigation system, and generates products such as high-precision ephemeris and satellite clock error, earth orientation parameters, tracking station coordinates and speed, global ionospheric delay, etc. information platform. It is mainly composed of about 30 tracking stations evenly distributed around the world, 3 data centers, 7 analysis centers, 1 monitoring and evaluation center, 1 product integration and service center, 1 operation management control center and communication network. Among them, the monitoring and evaluation center mainly realizes timely and accurate monitoring and evaluation of the satellite...

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