Assimilation of Radio Occultation Data in the Global Meteorological Model GME of the German Weather Service

被引：6
|
作者：
Pingel, D. [1 ]
Rhodin, A. [1 ]
机构：
[1] Deutsch Wetterdienst DWD, Offenbach, Germany
来源：
NEW HORIZONS IN OCCULTATION RESEARCH: STUDIES IN ATMOSPHERE AND CLIMATE | 2009年
关键词：
OBSERVATION OPERATORS; CHAMP;
D O I：
10.1007/978-3-642-00321-9_10
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
The assimilation of GPS radio occultations within the three-dimensional variational data assimilation system of the German Weather Service requires GPS radio occultation bending angle forward operators. To optimize the forward operator setup, different one- and three-dimensional bending angle forward operators are evaluated. The innovation statistics for radio occultation data from the CHAMP, GRACE-A, and FORMOSAT-3/COSMIC satellites are compared with estimates based on the background- and observation errors specified in the assimilation scheme. A numerical experiment is performed to assess the impact of assimilated radio occultation data on the weather forecast scores, to be compared to an experiment assimilating conventional observation data only.
引用
收藏
页码：111 / 129
页数：19
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