Test system and method for simulating on-orbit operation of satellite-borne GNSS receiver

Abstract

The invention provides a test system and method for simulating the on-orbit operation of a satellite-borne GNSS receiver. According to the invention, a GNSS system simulation model is built accordingto scene conditions of the on-orbit operation of the satellite-borne GNSS receiver, and simulation signals of corresponding navigation satellites are generated and outputted; a semi-physical simulation module is used for receiving the simulation signals, obtains parameters at a simulation operation state according to a preset positioning solution algorithm and outputs according to the requirementsof a control observation module; the PC control observation module sends a control instruction according to test rules, receives and observes output signals of the semi-physical simulation module atthe same time, converts the output signals from a hexadecimal system to a decimal system, and thus perform observation and evaluation on the performance of the simulation module. The system is simpleand convenient in test environment construction, low in overall cost and high in working efficiency and provides a simple, convenient, efficient and reliable method for on-orbit simulation testing ofthe satellite-borne GNSS receiver.

Description

technical field [0001] The invention relates to a system and method based on testing and evaluating the working performance of a space-borne GNSS receiver, especially a test system and method for simulating the on-orbit operation of a space-borne GNSS receiver, which belongs to the field of navigation. Background technique [0002] Currently commonly used GNSS systems include the GPS system in the United States, the Beidou system in China, the GLONASS in Russia and the GALILEO in Europe, etc. GNSS receivers are widely used, and their carriers range from mobile phones, cars to ships, and satellites. By receiving 4 or more navigation satellite signals, the position and clock error of the receiver can be obtained to realize single-point positioning. Since the observation equation of single-point positioning is nonlinear, the positioning solution needs to solve the nonlinear equations , the most commonly used orientations are Kalman filtering and least squares. [0003] No matt...

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Problems solved by technology

[0004] The present invention provides a test system and method for simulating the on-orbit operation of a space-borne GNSS receiver to overcome the defects of high economic and labor costs, low work efficiency, insufficient test items and difficult rectification in existing test methods.

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