globalchange  > 气候减缓与适应
DOI: 10.1002/2017JA025109
Scopus记录号: 2-s2.0-85044267726
论文题名:
Assessment of the Impact of FORMOSAT-7/COSMIC-2 GNSS RO Observations on Midlatitude and Low-Latitude Ionosphere Specification: Observing System Simulation Experiments Using Ensemble Square Root Filter
作者: Hsu C.-T.; Matsuo T.; Yue X.; Fang T.-W.; Fuller-Rowell T.; Ide K.; Liu J.-Y.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:3
起始页码: 2296
结束页码: 2314
语种: 英语
英文关键词: Ensemble Square Root Filter ; FORMOSAT-7/COSMIC-2 ; GIP/TIE-GCM ; GSI ionosphere ; ionospheric data assimilation ; RO sTEC
英文摘要: The Formosa Satellite-7/Constellation Observing System for Meteorology, Ionosphere, and Climate-2 (FORMOSAT-7/COSMIC-2) Global Navigation Satellite System radio occultation (RO) payload can provide global observations of slant total electron content (sTEC) with an unprecedentedly high spatial temporal resolution. Recently, a new ionospheric data assimilation system, the Community Gridpoint Statistical Interpolation (GSI) Ionosphere, is constructed with the National Oceanic and Atmospheric Administration GSI Ensemble Square Root Filter and the Global Ionosphere Plasmasphere and the Thermosphere Ionosphere Electrodynamic General Circulation Model. The paper demonstrates the capability of the GSI Ionosphere to improve the ionospheric specification and make a quantitative assessment of the impact of FORMOSAT-7/COSMIC-2 RO data on the ionospheric observing system simulation experiments conducted to calibrate key Ensemble Square Root Filter parameters that control detrimental effects of the sampling errors, particularly on the ensemble-based estimation of the correlation between observations and model states, in order to yield high-quality assimilation analysis. Results from the observing system simulation experiments show that (1) an ensemble size larger than 70 is recommended for assimilation of RO sTEC data with the GSI Ionosphere and (2) localizing the impact of observations around the tangent points in the horizontal direction with a length scale of 5,000 km is effective in improving assimilation analysis quality. Assimilation of sTEC data from FORMOSAT-7/COSMIC-2 can considerably improve the global ionospheric specification through the application of the GSI Ionosphere. The GSI Ionosphere can provide instantaneous global pictures of the ionosphere variability and help characterize day-to-day variability of the ionosphere and deepen our understanding of the observed day-to-day variability. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114324
Appears in Collections:气候减缓与适应

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作者单位: Institute of Space Science, National Central University, Taoyuan, Taiwan; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Aerospace Engineering Sciences, University of Colorado, Boulder, CO, United States; Institude of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Satellite Research Center, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, United States

Recommended Citation:
Hsu C.-T.,Matsuo T.,Yue X.,et al. Assessment of the Impact of FORMOSAT-7/COSMIC-2 GNSS RO Observations on Midlatitude and Low-Latitude Ionosphere Specification: Observing System Simulation Experiments Using Ensemble Square Root Filter[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(3)
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