Research on indoor calibration method of GNSS receiver based on GNSS signal simulator
According to JJF 1118-2004 Calibration Specification for Global Positioning System(GPS)Receivers,the calibration of GNSS static and dynamic receivers is carried out through GNSS baseline field.However,this method requires on-site collection of synchronous satellite observation data,which costs a lot of manpower and material resources,has high cost,high labor intensity and low efficiency.In order to solve this problem and realize laboratory calibration of GNSS receiver,a GNSS receiver calibra-tion method based on GNSS signal simulator is proposed in this paper.The GNSS signal simulator and re-ceiver were used to record the observation data of the synchronous satellite on the baseline field,and then the data was played back to the calibrated receiver in the laboratory.The baseline calculation was carried out with the data processing software,and the calculation results were compared with the refer-ence value to obtain the baseline measurement error.Data from 5 observation stations were collected syn-chronously during the test,and 3 stations were recorded by GNSS signal simulator.The experimental re-sults show that the calibration method of GNSS receiver based on GNSS signal simulator is feasible.
GNSS signal simulatorGNSS receiverpower dividerGNSS baseline fieldradiating an-tenna
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