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Volume 14
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10.3390/rs14153544
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Article

Analysis of Space-Borne GPS Data Quality and Evaluation of Precise Orbit Determination for COSMIC-2 Mission Based on Reduced Dynamic Method

by
Qiaoli Kong
*,
Yanfei Chen
,
Wenhao Fang
,
Guangzhe Wang
,
Changsong Li
,
Tianfa Wang
,
Qi Bai
and
Jingwei Han
College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2022, 14(15), 3544; https://doi.org/10.3390/rs14153544
Submission received: 23 June 2022 / Revised: 21 July 2022 / Accepted: 21 July 2022 / Published: 24 July 2022
(This article belongs to the Special Issue Precision Orbit Determination of Satellites)
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Abstract

COSMIC-2 is a remote sensing satellite mission that mainly provides scientific data for weather forecasting, ionosphere, and climate research. High precise orbit is the basis for the application of remote sensing satellite data. In order to realize the precise orbit determination (POD) of COSMIC-2, we have assessed the quality of space-borne GPS observation in detail, including the utilization of GPS observations, cycle slip ratio (o/slps), multipath error, single-noise ratio (SNR) and ionospheric delay rate (IOD) of the data, realized the POD of COSMIC-2 with the reduced dynamic (RD) method, and evaluated the accuracy of the solved orbit by means of the carrier-phase residual, overlapping orbit comparison and the reference orbit comparison. The data quality assessments show that the data is less affected by the multipath effect, the utilization of the data is low, cycle slips occur frequently, and the carrier-phase data is often interrupted. The POD results indicate that the root mean square (RMS) values of the carrier-phase residuals of six COSMIC-2 satellites are between 6.0 mm and 7.5 mm, The mean RMS values of the overlapping orbit are better than 0.92 cm, 1.33 cm and 1.03 cm in the radial (R), tangential (T) and normal (N) directions respectively, and the mean RMS values of the six satellites in the 3D direction are between 1.38 cm and 1.75 cm. The mean RMS values in R, T and N directions orbit determination accuracy of the reference orbit comparison are better than 5.61 cm, 6.59 cm and 2.29 cm respectively, and the mean RMS values of the six satellites in the 3D direction are between 7.35 cm and 8.79 cm.
Keywords: COSMIC-2; space-borne GPS; quality assessment; reduced dynamic method; precise orbit determination COSMIC-2; space-borne GPS; quality assessment; reduced dynamic method; precise orbit determination
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MDPI and ACS Style

Kong, Q.; Chen, Y.; Fang, W.; Wang, G.; Li, C.; Wang, T.; Bai, Q.; Han, J. Analysis of Space-Borne GPS Data Quality and Evaluation of Precise Orbit Determination for COSMIC-2 Mission Based on Reduced Dynamic Method. Remote Sens. 2022, 14, 3544. https://doi.org/10.3390/rs14153544

AMA Style

Kong Q, Chen Y, Fang W, Wang G, Li C, Wang T, Bai Q, Han J. Analysis of Space-Borne GPS Data Quality and Evaluation of Precise Orbit Determination for COSMIC-2 Mission Based on Reduced Dynamic Method. Remote Sensing. 2022; 14(15):3544. https://doi.org/10.3390/rs14153544

Chicago/Turabian Style

Kong, Qiaoli, Yanfei Chen, Wenhao Fang, Guangzhe Wang, Changsong Li, Tianfa Wang, Qi Bai, and Jingwei Han. 2022. "Analysis of Space-Borne GPS Data Quality and Evaluation of Precise Orbit Determination for COSMIC-2 Mission Based on Reduced Dynamic Method" Remote Sensing 14, no. 15: 3544. https://doi.org/10.3390/rs14153544

APA Style

Kong, Q., Chen, Y., Fang, W., Wang, G., Li, C., Wang, T., Bai, Q., & Han, J. (2022). Analysis of Space-Borne GPS Data Quality and Evaluation of Precise Orbit Determination for COSMIC-2 Mission Based on Reduced Dynamic Method. Remote Sensing, 14(15), 3544. https://doi.org/10.3390/rs14153544

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