Abstract
The HY-2 (Haiyang-2) satellite was launched in August 2011. The scanning microwave radiometer (RM) onboard HY-2 has low frequency channels with the capability for sea surface temperature (SST) observations from space. The HY-2 RM L2A SST products are evaluated. The L2A products are compared with WindSat, AMSR2 SST products and in situ SST measurements by buoy. The results indicate a standard deviation around 2 oC with fluctuated bias. The comparisons of the daily ascending passes between HY-2 RM and WindSat in January 2013 show the bias of each day is between 0.12 oC and 0.75 oC and the standard deviation is between 1.75 oC and 2.97 oC. For descending passes, the bias is from −0.51 oC to 0.25 oC and standard deviation from 1.56 oC to 2.58 oC. The statistics of the matchups between HY-2 RM and buoy SST data during the period of August 2012 to December 2014 shows a bias of −0.29 oC and standard deviation of 1.94 oC. The relationships between SST difference and the surface parameters such as wind speed and SST are investigated.
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