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WIND SPEED RETRIEVING FOR COMBINED OBSERVATIONS OF SCATTEROMETER AND RADIOMETER ONBOARD HY-2A FOR TYPHOONS USING NEURAL NETWORK
Xu, Xingou; Dong, Xiaolong; Zhang, Lei; Zhu, Di; Lang, Shuyan
Department微波遥感部
Source Publication2017 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
2017
Pages2164-2166
Language英语
ISSN2153-6996
ISBN978-1-5090-4951-6
AbstractIn typhoon conditions, air-sea interactions are fierce, the wind speeds are quite high and usually tangled with complex rains. Under such circumstances, the combined observations of scatterometer and radiometer would be able to provide good information although traditional wind filed retrieving methods for them, i. e. MLE based on GMF (Geographical Modelling Function) for scatterometer and RTM(Radiative Transfer Method) which are originated from low or median wind conditions will not be applicable. In this paper, a neural network was employed to combine the observations of the two sensors onboard HY-2A satellite: radiometer (HRAD) and scatterometer (HSCAT) to achieve wind speed retrieving under typhoon conditions. The network was trained by GRAPS (global/regional assimilation and prediction system) data used as true values of wind speeds in typhoons. The established network was verified by data excluded from training data set. Results show that the wind speeds obtained from the network are better than the products of HY-2A compared to GRAPS data. The research of this paper has provided a clue of retrieving typhoon wind speeds for HY-2A products and for the data processing of coming HY satellite series, though further work on wind direction obtain, data comparison between different kinds of assimilation and perdition systems and the test of this method on other scatterometer and radiometer data are to be done in the near future.
KeywordTyphoon Wind Speed Retrieving Scatterometer Radiometer Combined Observation Hy-2a
Conference NameIEEE International Geoscience & Remote Sensing Symposium
Conference DateJUL 23-28, 2017
Conference PlaceFort Worth, TX
Indexed ByCPCI
Document Type会议论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6279
Collection微波遥感部
Recommended Citation
GB/T 7714
Xu, Xingou,Dong, Xiaolong,Zhang, Lei,et al. WIND SPEED RETRIEVING FOR COMBINED OBSERVATIONS OF SCATTEROMETER AND RADIOMETER ONBOARD HY-2A FOR TYPHOONS USING NEURAL NETWORK[C],2017:2164-2166.
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