scholarly journals Characteristics of atmospheric gravity wave activity in the polar regions revealed by GPS radio occultation data with CHAMP

2008 ◽  
Vol 113 (D4) ◽  
Author(s):  
Hayato Hei ◽  
Toshitaka Tsuda ◽  
Toshihiko Hirooka
Keyword(s):  
Gravity Wave ◽  
Radio Occultation ◽  
Wave Activity ◽  
Polar Regions ◽  
Atmospheric Gravity Wave ◽  
Gps Radio Occultation ◽  
Occultation Data ◽  
Atmospheric Gravity ◽  
Radio Occultation Data

Backpropagation Processing of GPS Radio Occultation Data

2003 ◽  
pp. 415-422 ◽  
Author(s):  
Chi O. Ao ◽  
George A. Hajj ◽  
Thomas K. Meehan ◽  
Stephen S. Leroy ◽  
E. Robert Kursinski ◽  
...  
Keyword(s):  
Radio Occultation ◽  
Gps Radio Occultation ◽  
Occultation Data ◽  
Radio Occultation Data

scholarly journals GPS Radio Occultation Data Assimilation in the AREM Regional Numerical Weather Prediction Model for Flood Forecasts

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Wei Cheng ◽  
Youping Xu ◽  
Zhiwu Deng ◽  
Chunli Gu
Keyword(s):  
Data Assimilation ◽  
Radio Occultation ◽  
Weather Prediction ◽  
Radiosonde Data ◽  
Light Rain ◽  
Gps Radio Occultation ◽  
Study Results ◽  
Occultation Data ◽  
Radio Occultation Data

Based on the Backward Four-Dimensional Variational Data Assimilation (Backward-4DVar) system with the Advanced Regional Eta-coordinate Model (AREM), which is capable of assimilating radio occultation data, a heavy rainfall case study is performed using GPS radio occultation (GPS RO) data and routine GTS data on July 5, 2007. The case study results indicate that the use of radio occultation data after quality control can improve the quality of the analysis to be similar to that of the observations and, thus, have a positive effect when improving 24-hour rainfall forecasts. Batch tests for 119 days from May to August during the flood season in 2009 show that only the use of GPS RO data can make positive improvements in both 24-hour and 48-hour regional rainfall forecasts and obtain a better B score for 24-hour forecasts and better TS score for 48-hour forecasts. When using radio occultation refractivity data and conventional radiosonde data, the results indicate that radio occultation refractivity data can achieve a better performance for 48-hour forecasts of light rain and heavy rain.

Comparison of the CHAMP radio occultation data with the Canadian advanced digital ionosonde in the Polar Regions

2009 ◽  
Vol 44 (11) ◽  
pp. 1304-1308 ◽  
Author(s):  
Samaneh Sadighi ◽  
P.T. Jayachandran ◽  
N. Jakowski ◽  
J.W. MacDougall
Keyword(s):  
Radio Occultation ◽  
Polar Regions ◽  
Occultation Data ◽  
Radio Occultation Data
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