Method for performing ground check and performance evaluation on satellite-borne measurement-type GNSS (Global Navigation Satellite System) receiver
An evaluation method and receiver technology, which are applied in the directions of measurement devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., can solve the problems of inability to verify the ground performance of GNSS receivers, inability to perform effective simulations, etc., to improve performance. The scope of assessment, the improvement of ability, the effect of improving verification ability
Active Publication Date: 2013-05-01
BEIJING INST OF SPACECRAFT SYST ENG
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Therefore, the navigation signal has a very high dynamic Doppler characteristic, and it cannot be effectively simulated in the ground test
Therefore, the high-precision measurement GNSS receiver cannot use the traditional field differential test method to verify the ground performance of the GNSS receiver
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[0022] Such as figure 1 As shown in Fig. 2, the work test of the spaceborne measurement GNSS receiver is carried out in the emulator simulation environment, and the various observation data obtained by the receiver are preliminarily sorted out to form observation data files.
[0023] 1) Firstly, check the format of the observation data file, compare the observation data file generated by the spaceborne measurement GNSS receiver with the ASCII code character by character, and record the abnormal position of the observation value and eliminate it when an abnormal character is found. The file is output in the international standard RINEX2.1 format to ensure the validity of the data file.
[0024] 2) Carry out data integrity checks. The data observation files in RINEX format will be analyzed, and all observation data types (including carrier, pseudocode, Doppler, etc.) of each satellite in a single observation epoch will be counted and calculated. By analogy, the number of data ...
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The invention provides a method for performing ground check and performance evaluation on a satellite-borne measurement-type GNSS (Global Navigation Satellite System) receiver. The method comprises the following steps of: firstly performing observation data verification on observation data generated by the satellite-borne measurement-type GNSS receiver; and after verification is finished, further performing orbit determination performance test on the satellite-borne measurement-type GNSS receiver by utilizing a geometrical orbit determination method. The process of performing data verification on the observation data mainly comprises four links, namely observation data standard format treatment, observation data type integrity checking, observation data quality evaluation based on calculation on observed value dual difference of different navigational satellites at a same frequency and observed value single difference of a same navigational satellite at different frequencies, and evaluation on pseudo range and carrier noise based on simulation data observation in a zero / short base line under the condition of no satellite; and during orbit determination performance test, by virtue of solving a linearized observation equation and comparing the linearized observation equation with a theoretical value, the orbit determination accuracy of the satellite-borne measurement-type GNSS receiver is obtained. The method provided by the invention can be used for directly and comprehensively evaluating the performance of the satellite-borne measurement-type GNSS receiver.
Description
technical field [0001] The invention relates to a data quality testing and evaluation method of a high-dynamic space-borne high-precision measurement GNSS receiver. Background technique [0002] Due to the low measurement accuracy of traditional positioning receivers, they can no longer meet the high-precision orbit determination requirements of current satellites. The high-performance spaceborne measurement type (orbit determination type) GNSS receiver can realize the orbit measurement of the spacecraft with centimeter-level precision through the measurement of the pseudo-range and carrier phase of the navigation signal, and thus realize the high-precision positioning of the spacecraft. rail. With the continuous development and improvement of GNSS technology, many spacecraft with high-precision orbit determination requirements (such as resource satellites, surveying and mapping satellites, etc.) are equipped with space-borne high-precision measurement GNSS receivers. Beca...
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IPC IPC(8): G01S19/23
Inventor 刘宁刘希刚黄缙张新伟
Owner BEIJING INST OF SPACECRAFT SYST ENG
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