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地球与行星物理

ISSN  2096-3955

CN  10-1502/P

Citation: Yan Cheng, Jian Lin, XuHui Shen, Xiang Wan, XinXing Li, WenJun Wang, 2018: Analysis of GNSS radio occultation data from satellite ZH-01, Earth and Planetary Physics, 2, 499-504. doi: 10.26464/epp2018048

2018, 2(6): 499-504. doi: 10.26464/epp2018048

SPACE PHYSICS

Analysis of GNSS radio occultation data from satellite ZH-01

1. 

Space Star Technology Company Limited, Beijing 100194, China

2. 

Institute of Seismology, China Earthquake Administration, Wuhan 430071, China

3. 

Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China

Corresponding author: Jian Lin, ljian2008@126.com

Received Date: 2018-11-01
Web Publishing Date: 2018-11-01

The electromagnetic satellite Zhangheng 01 (ZH-01) was successfully launched on February 2, 2018. The GNSS Radio Occultation (GRO) receiver on board the satellite is able to observe the occultation events of GPS and BeiDou navigation satellites. We analyzed the data acquired during the in-orbit testing period. We concludes that the GRO ionosphere inversion results are reasonable, the trend is correct, the satellite can observe about 600 ionosphere occultation events each day. The global coverage of more than 30000 consecutive GRO events in more than two months were analyzed and compared with COSMIC observations: both the GRO and COSMIC occultation can realize global coverage: the NmF2 and HmF2 global distributions are similar and change obviously with latitude. We used three digisondes at different latitudes to analyze and compare the spatio-temporally consistent GRO data: the RMSE of GRO NmF2 relative to digisonde is better than 9.41%, the correlation coefficient is better than 0.8682: the relative RMSE of HmF2 is better than 7.80% and the correlation coefficient is better than 0.7066.

Key words: ZH-01, GRO occultation, ionosphere inversion, digisonde

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Analysis of GNSS radio occultation data from satellite ZH-01

Yan Cheng, Jian Lin, XuHui Shen, Xiang Wan, XinXing Li, WenJun Wang