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On the basis of extracting the clear brightness temperature in GMS-4 infrared data,the testshave been carried out by using three methods for SST retrieval in the northwestern Pacific Ocean inAugust 1993.Considering error amplification is the inherent feature in the single channel physicalmethod,two statistical methods are developed.One is a single channel method.Its precision is1.186℃,which is superior to that of other similar methods.The other is a multi-channel methodusing both TOVS and GMS-4 data.Its precision is 1.061℃,which is matched with that of othercurrent multi-channel statistical methods(0.5—1.36℃).The retrieval SST distributions obtainedby the two methods are in good agreement with conventional observations.
On the basis of extracting the clear brightness temperature in GMS-4 infrared data, the testshave been carried out by using three methods for SST retrieval in the northwestern Pacific Ocean in August 1993. Consumption error amplification is the inherent feature in the single channel physical method, two Statistical methods are developed. One is is a single channel method. One precision is 1.86 ° C, which is superior to that of other similar methods. The other is a multi-channel method using both TOVS and GMS-4 data. , which is matched with that of other current multi-channel statistical methods (0.5-1.36 ° C). The retrieval SST distributions obtained by the two methods are in good agreement with conventional observations.