Open AccessAnalysis of GNSS radio occultation data from satellite ZH‐01
Author(s) -
Cheng Yan,
Lin Jian,
Shen XuHui,
Wan Xiang,
Li XinXing,
Wang WenJun
Publication year - 2018
Publication title -
earth and planetary physics
Language(s) - English
Resource type - Journals
ISSN - 2096-3955
DOI - 10.26464/epp2018048
Subject(s) - radio occultation , occultation , gnss applications , ionosphere , satellite , geodesy , latitude , cosmic cancer database , global positioning system , geology , meteorology , remote sensing , environmental science , physics , astronomy , telecommunications , computer science
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 N m F 2 and H m F 2 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 N m F 2 relative to digisonde is better than 9.41%, the correlation coefficient is better than 0.8682: the relative RMSE of H m F 2 is better than 7.80% and the correlation coefficient is better than 0.7066.