北极星载微波辐射计海表温度遥感观测能力分析

本文利用2016年的AMSR2、GMI、WindSat和HY-2A RM等星载微波辐射计海表温度（SST）数据，分析了北极卫星遥感SST数据的时空覆盖和产品精度情况。结果表明:北极星载微波辐射计SST冬季覆盖率和有效覆盖天数要低于夏季，GMI的SST有效覆盖率较低，AMSR2较高，联合使用AMSR2、GMI、WindSat和HY-2A RM星载微波辐射计SST数据，2月份覆盖率在12%~15%之间，有效观测天数优于26 d，8月份覆盖率全月高于26%，有效观测天数优于29 d。北极地区星载微波辐射计SST数据的误差均要大于全球平均水平，AMSR2数据精度较好，WindSat与AMSR2的精度相当，GMI的均方根误差约是AMSR2的2倍，HY-2A RM数据精度低于其他星载微波辐射计水平。

Analysis of the Arctic sea surface temperature observation capability using space borne microwave radiometer data

In this paper, SST data of AMSR2, GMI, WindSat and HY-2A RM in 2016 are used to analyze the space-time coverage and the accuracy of remote sensing SST in the Arctic. The results show that, the space borne microwave radiometer SST retrievals coverage rate and effective coverage days in winter are lower than that in summer, and the effective SST coverage rate of GMI is lower, and AMSR2 is higher. When AMSR2, GMI, WindSat and HY-2A RM space borne microwave radiometer SST data are combined used, the SST coverage rate can be between 12%-15% in February, and the number of effective observation days is better than 26 days. The SST coverage rate is higher than 26% in the whole August, and the number of effective observation days is better than 29 days. The error of the space borne microwave radiometer SST data in the Arctic is larger than that of the global average. The accuracy of AMSR2 data is the best one, the accuracy of WindSat data is close to that of AMSR2. The RMSE of GMI SST is about 2 times larger than AMSR2, and the accuracy of HY-2A RM data is lower than that of any other space borne microwave radiometer.