Analysis of GNSS radio occultation data from satellite ZH-01  

作　　者：Yan Cheng Jian Lin XuHui Shen Xiang Wan XinXing Li WenJun Wang 

机构地区：[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

出　　处：《Earth and Planetary Physics》2018年第6期499-504,共6页地球与行星物理（英文版）

摘　　要：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 Nm F2 and Hm F2 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 Nm F2 relative to digisonde is better than 9.41%, the correlation coefficient is better than 0.8682: the relative RMSE of Hm F2 is better than 7.80% and the correlation coefficient is better than 0.7066.The electromagnetic satellite Zhangheng 01 （ZH-01） was successfully launched on February 2, 2018. The GNSS RadioOccultation （GRO） receiver on board the satellite is able to observe the occultation events of GPS and BeiDou navigation satellites. Weanalyzed 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 30000consecutive GRO events in more than two months were analyzed and compared with COSMIC observations： both the GRO and COSMICoccultation can realize global coverage： the NmF2 and HmF2 global distributions are similar and change obviously with latitude. We usedthree digisondes at different latitudes to analyze and compare the spatio-temporally consistent GRO data： the RMSE of GRO NmF2 relativeto 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 thecorrelation coefficient is better than 0.7066.

关 键 词：ZH-01 GRO occultation ionosphere inversion DIGISONDE 

分 类 号：P35[天文地球—空间物理学]