PROJECT TITLE :

Intercalibration of Advanced Microwave Scanning Radiometer-2 (AMSR2) Brightness Temperature

ABSTRACT:

Here, we describe the characteristics of brightness temperature (Tb) measured by the Advanced Microwave Scanning Radiometer-two (AMSR2) onboard the worldwide Modification Observation Mission 1st-Water (GCOM-W1). This mission aims to achieve long-term world monitoring of Earth using two polar-orbiting satellite observation systems with three consecutive generations. GCOM-W1, the first satellite of the GCOM-W (Water) series, was launched successfully on Might 18, 2012. AMSR2 is a single-mission instrument onboard the GCOM-W1 satellite. The basic characteristics of AMSR2 are like those of its predecessor, AMSR-E; this permits the continuation of AMSR-E observations however with many enhancements, together with a bigger main reflector (two.zero-m diameter), further channels at C-band frequency, an improved calibration system, and increased reliability imparted by the addition of a redundant momentum wheel. Since July three, 2012, the instrument has functioned properly and has accumulated a knowledge set of Tb measurements. During the initial calibration and validation amount, Tb values are being evaluated and characterized in step with numerous methodologies, including intercalibration between similar microwave radiometers [e.g., the Tropical Rainfall Measuring Mission Microwave Imager (TMI)] primarily based on radiative transfer computations. The intercalibration results for the ocean area because the cold end and the rainforest area the as heat finish demonstrate that Tb measured by AMSR2 exhibits no apparent seasonal variation, with a maximum calibration difference of approximately 5 K compared to TMI and AMSR-E. This calibration difference seems to rely on the Tb of the observed object.


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