Aqua/AMSR-E L3 AMSR2 Format 23.8GHz Mean for Brightness Temperature (1-Day, 0.1 deg)

It conically scans and keeps an angle of incidence on the earth surface (a nominal of 55 degrees) and accomplishes a swath width of about 1450 km. The AMSR-E reached its limit to maintain the antenna rotation speed necessary for regular observations, and the AMSR-E restarted its observation in slow rotation mode (2 rotations per minute) on December 4, 2012. However, the AMSR-E reached its limit to maintain the antenna rotation speed necessary for slow rotation mode and it automatically halted its observation and rotation on December 4, 2015.

Level 3 data inputs level 1B and level 2 data and projected to the map in accordance with the specified projection technique (Equi-Rectangular (EQR) or Polar Stereographic (PS)), and then averaged temporally and spatially. These statistical values are computed for observation data on ascending orbit and descending orbit respectively. This product includes averaged Brightness Temperature at 23.8GHz (Brightness_Temperature_(H), Brightness_Temperature_(H)).

Values that are calculated from sensor counts and are proportional to the power of observed electromagnetic wave. Unit is Kelvin. Horizontal polarized wave and vertical polarized wave are stored separately.

The provided format is HDF5. The spatial resolution is 0.1 deg. The statistical period is 1 day.

The current version of the product is "Version 4". The projection method is EQR and PS. The generation unit is global.