Preliminary Assessment of BDS Radio Occultation Retrieval Quality and Coverage Using FY-3E GNOS II Measurements
-
Published:2023-10-18
Issue:20
Volume:15
Page:5011
-
ISSN:2072-4292
-
Container-title:Remote Sensing
-
language:en
-
Short-container-title:Remote Sensing
Author:
Liu Congliang1234ORCID, Liao Mi5, Sun Yueqiang123, Wang Xi1234, Liang Jiahui123, Hu Xiuqing5ORCID, Zhang Peng5ORCID, Yang Guanglin5, Liu Yan5, Wang Jinsong5, Bai Weihua123, Du Qifei123, Meng Xiangguang123ORCID, Hu Peng12, Tan Guangyuan12, Wang Xianyi123ORCID, Xia Junming123, Huang Feixiong12ORCID, Yin Cong12, Cai Yuerong123, Li Wei12, Li Peixian4ORCID, Kirchengast Gottfried26ORCID
Affiliation:
1. Beijing Key Laboratory of Space Environment Exploration, National Space Science Center, Chinese Academy of Sciences (NSSC/CAS), Beijing 100190, China 2. International Laboratory on Climate and Atmosphere Research with Occultation & Reflectometry Observing Systems (ICAROS) of NSSC/CAS, German Research Centre for Geosciences (GFZ), University of Graz, 8010 Graz, Austria 3. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China 4. School of Geoscience and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China 5. National Satellite Meteorological Center, China Meteorological Administration (NSMC/CMA), Beijing 100081, China 6. Wegener Center for Climate and Global Change (WEGC) and Institute of Physics, University of Graz, 8010 Graz, Austria
Abstract
The FengYun-3E Global Navigation Satellite System (GNSS) occultation sounder II (FY-3E GNOS II) was launched on 5 July 2021. For the first time, based on the new GNOS II sensor, this mission realizes radio occultation (RO) and reflectometry observations using the navigation signals from the third-generation BeiDou System (BDS-3), and it is hence important to assess and analyze the BDS-3 remote sensing performances relative to other systems. Here, we assessed FY-3E GNOS II RO atmospheric retrievals by inter-comparing with corresponding data from the NCEP FNL global atmospheric analysis and FY-3D GNOS mission. The GNOS RO data quality and consistency of the different FY-3 meteorological satellites, i.e., FY-3D and FY-3E, as well as different GNSS systems (GPS, BDS-2, BDS-3) were analyzed. We find that the FY-3E GNOS II RO data exhibit better quality than FY-3D GNOS, particularly in the number, penetration height toward surface, and global coverage by BDS RO profiles, due to the integration of BDS-2 and BDS-3. Additionally, comparing with co-located NCEP FNL analysis profiles, the mean difference (and standard deviation) of the FY-3E GNOS II RO atmospheric refractivity profile retrievals is found to be smaller than 0.2% (and 1%), in the upper troposphere and lower stratosphere, from 5 to 30 km, and remains consistent at this accuracy and precision level with the FY-3D GNOS RO data. These features provide clear evidence for a high utility of the new GNOS II RO data for weather and climate research and applications.
Subject
General Earth and Planetary Sciences
Reference54 articles.
1. Analysis of errors in the vertical temperature profiles recovered from GPS occultation observations;Hajj;Eos Trans. AGU,1991 2. Melbourne, W.G., Davis, E.S., Duncan, C.B., Hajj, G.A., Hardy, K.R., Kursinski, E.R., Meehan, T.K., Yong, L.E., and Yunck, T.P. (1994). The Application of Spaceborne GPS to Atmospheric Limb Sounding and Global Change Monitoring, JPL Publucation 94–18. 3. Initial results of radio occultation observations of Earth’s atmosphere using the global positioning system;Kursinski;Science,1996 4. Observing Earth’s atmosphere with radio occultation measurements using the global positioning system;Kursinski;J. Geophys. Res.,1997 5. Climate benchmark profiling of greenhouse gases and thermodynamic structure and wind from space;Kirchengast;Geophys. Res. Lett.,2011
|
|