Inter-Calibration of Passive Microwave Brightness Temperature Observed by FY-3B/MWRI and Aqua/AMSR-E on Arctic

The inter-calibration of the brightness temperature between FY-3B/MWRI and Aqua/AMSR-E is studied by 8858 files of MWRI L1 and 9327 files of AMSR-E L2A from November 18, 2010 to September 30, 2011 with the spatial coverage on north of 60°N. According to the polar projection, time-space matching and linear fitting, the inter-calibration parameters of the MWRI and AMSR-E are achieved. From the scatters of each channel and the statistic analysis, it shows that there are some deviation between the two sensors but it has obvious consistency on overall trend and the correlation coefficients of the TB in H and V polarization among all channel are more than 0.9. Using the linear regression analysis, the slopes and intercepts of the fitting equations for 10.7~89.0GHz H/V ascending and descending TB data on every month of the data sets were achieved. After inter-calibration the statistic parameters between the two sensors are obviously optimized.