Analysis on the Performance of Microwave Radiometer on Monitoring Sea Surface Wind under Non\|precipitation Conditions

doi:10.11873/j.issn.1004-0323.2016.1.0109

Abstract

Abstract:

In this study,the sea surface wind speed and wind direction data from five microwave radiometers including SSM/I,SSM/IS,TMI,AMSR\|E and WINDSAT,and two microwave scatterometers including ASCAT and QUIKSCAT,are compared with collocated buoy data.The results shows that the accuracy of wind speed from microwave radiometers is about 1 m/s,which meet requirements of most applications.Low frequency products of microwave radiometers are more accurate than the middle frequency products.However,the middle frequency products are recommended to be used in offshore applications for its higher horizontal resolution,and low frequency products are recommended for applications in the open ocean.In the five microwave radiometers,AMSR\|E and WINDSAT give better wind speed products than TMI,while TMI preforms better than SSM/I and SSM/IS.The microwave scatterometers are slightly better at monitoring sea surface wind speed than the microwave radiometers,but the microwave radiometers are better at monitoring larger wind speed.While WINDSAT is the only microwave radiometer able to get wind direction information,microwave radiometers perform much better on monitoring sea surface wind direction than WINDSAT.Only when the wind speed exceeds 6 m/s,sea surface wind data provided by WINDSAT could meet the requirements of applications.And when wind speed is larger than 8 m/s,wind direction from WINDSAT shows similar accuracy with that from microwave scatterometers.On the basis of these results,this study pointed out the needs of improvement of wind remote sensing under high wind conditions.Meanwhile,the accuracy of wind data from buoy is also preliminarily analyzed and based on the analysis,directions of improvements of buoys are proposed.

Key words: Microwave radiometer, Sea surface wind, Data verification

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顎�

鍏抽敭璇�: 寰尝杈愬皠璁�, 娴烽潰椋�, 鏁版嵁楠岃瘉

CLC Number:

TP 722.6

Sun Qiang,L眉 Daren顎�. Analysis on the Performance of Microwave Radiometer on Monitoring Sea Surface Wind under Non\|precipitation Conditions[J]. Remote Sensing Technology and Application, 2016, 31(1): 109-118.

瀛欏己,鍚曡揪浠侇��. 闈為檷姘存潯浠朵笅寰尝杈愬皠璁℃捣闈㈤閬ユ劅浜у搧鎬ц兘鍒嗘瀽[J]. 閬ユ劅鎶�鏈笌搴旂敤, 2016, 31(1): 109-118.

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