Intercalibration of the Advanced Microwave Scanning Radiometer-2 (AMSR2) level-1B dataset

This paper reports characteristics of the AMSR2 L1B brightness temperature (Tb) measurement through intercalibration approach among other microwave radiometers including the TRMM/TMI with help of radiative transfer models. The intercalibration results indicate that AMSR2 has calibration difference, 5K at most, compared with TMI and the relative differences of some channels depend on observed scene temperature. There is no apparent seasonal variation and no undesirable discrepancy between daytime and nighttime orbits on the AMSR2 Tbs. The cause of the calibration difference is under investigation.