风云三号C星GNOS北斗掩星电离层探测初步结果

杨光林; 孙越强; 白伟华; 张效信; 杨忠东; 张鹏; 谭广远

doi:10.11728/cjss2019.01.036

风云三号C星GNOS北斗掩星电离层探测初步结果

doi: 10.11728/cjss2019.01.036

杨光林^1,2,3,4,
孙越强^1,4,5,
白伟华^1,4,5, ,,
张效信^2,3,
杨忠东³,
张鹏³,
谭广远^1,5

1. 中国科学院国家空间科学中心北京 100190;
2. 国家空间天气监测预警中心中国气象局空间天气重点开放实验室北京 100081;
3. 国家卫星气象中心北京 100081;
4. 中国科学院大学北京 100049;
5. 天基空间环境探测北京市重点实验室北京 100190

基金项目:

国家自然科学基金项目（41405039， 41405040， 41505030， 41606206， 41775034），中国科学院空间先导专项（XDA15007501），中国科学院科研装备研制项目（YZ201129），国家重点研发计划重点专项项目（2017YB0502800， 2017YFB0502802），公益性行业（气象）科研专项基金（GYHY201006048， GYHY201306063）共同资助

详细信息

作者简介:
杨光林,yglyang@cma.gov.cn

通讯作者:
白伟华,bjbwh@163.com

中图分类号: P352
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- 被引次数: 0
出版历程
- 收稿日期: 2017-12-11
- 修回日期: 2018-05-28
- 刊出日期: 2019-01-15

Beidou Navigation Satellite System Sounding of the Ionosphere from FY-3C GNOS:Preliminary Results

1 National Space Science Center, Chinese Academy of Sciences, Beijing 100190;
2 Key Laboratory of Space Weather, National Center for Space Weather, China Meteorological Administration, Beijing 100081;
3 National Satellite Meteorological Center, Beijing 100081;
4 University of Chinese Academy of Sciences, Beijing 100049;
5 Beijing Key Laboratory of Space Environment Exploration, Beijing 100190

摘要

摘要: 利用风云三号卫星C星GNOS掩星探测仪电离层数据，分析了2013年10月FY-3C GNOS探测的北斗掩星电离层廓线分布，将2013年10月1日至2015年10月10日期间FY-3C GNOS观测的F₂层峰值电子密度（N_mF₂）与地面电离层测高仪观测结果进行对比，验证了FY-3C GNOS北斗电离层掩星的探测精度.结果表明，FY3-C GNOS北斗电离层掩星与电离层测高仪探测的N_mF₂数据相关系数为0.96，平均偏差为10.21%，标准差为19.61%.在不同情况下其数据精度有如下特征：白天精度高于夜晚；夏季精度高于分季，分季精度高于冬季；中纬地区精度高于低纬地区，低纬地区精度高于高纬地区； BDS倾斜同步轨道（IGSO）卫星精度高于同步轨道（GEO）卫星和中轨道（MEO）卫星.FY-3C GNOS北斗电离层掩星与国际上其他掩星电离层数据精度的一致性对GNSS掩星探测资料的综合利用具有重大意义.
- 掩星 /
- 全球导航卫星掩星探测仪 /
- 北斗卫星导航系统 /
- 电离层
Abstract: The world's first dual-system compatible Global Navigation Satellite System (GNSS) Occultation Sounder (GNOS) for Beidou Navigation Satellite System (BDS) and Global Positioning System (GPS) was successfully launched into orbit with FY-3C satellite on 23 September 2013, and a large number of ionospheric BDS Radio Occultation (BDSRO) data have been collected. The ionospheric BDSRO products observed by FY-3C GNOS are introduced firstly, then the distribution of ionospheric Electron Density Profiles (EDPs) in October 2013 is analyzed. Finally, the precision of ionospheric BDSRO data obtained by FY-3C GNOS is verified through F₂-layer peak electron density (N_mF₂) comparisons between BDSRO and ionosondes. The results show that the correlation coefficient ofN_mF₂ data between BDSRO and ionosondes is 0.96, the bias is 10.21% and the standard deviation is 19.61%, which is comparable with other international ionospheric occultation products based on GPS. The N_mF₂ precision of BDSRO has the following characteristics. Its precision at daytime is higher than that at nighttime, and its precision in summer is higher than that in equinox seasons, while the precision in winter is lowest. Moreover, its precision at mid-latitude region is higher than that at low-latitude region, and the precision at high-latitude region is lowest. The precision of BDS satellites on Inclined Geosynchronous Satellite Orbit (IGSO) is higher than that on Geosynchronous Orbit (GEO) and Medium Earth Orbit (MEO). The precision consistency of the ionospheric occultation product between BDS-FY-3C GNOS and other internationl occultation projects is of great significance for comprehensively utilizing the GNSS occultation observation data. With the continued deployment of FY-3 satellites and Beidou navigation satellites, GNOS can provide more ionospheric occultation data in the future, which will be helpful to the ionospheric research and space weather forecasting based on GNSS occultation observations.
- Radio occultation /
- Global navigation satellite system occultation sounder /
- Beidou navigation satellite system /
- Ionosphere

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