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AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures, Version 3

The AMSR-E Level-2A product (AE_L2A) contains brightness temperatures available at a variety of resolutions that correspond to the footprint sizes of the observations. Each swath is packaged with associated geolocation fields.

Version Summary:

Changes to this algorithm include:

Complete recalibration to RSS Version 7 standard, as follows:

  • Intercalibration with other microwave radiometers, particularly SSM/I F13 and WindSat
  • Calibration with improved Radiative Transfer Model (RTM): RSS RTM Version 2011
  • Updated ocean emissivity model (Meissner and Wentz 2012)
  • Adjustment of the water vapor and oxygen absorptions, particularly the water vapor continuum absorption
  • Improved calibration over land, based on heavily vegetated tropical rainforest scenes
  • Nonlinearity correction at 18.7 GHz, brightness temperatures approx. 2 degrees K lower over land
  • Adjustment to Antenna Pattern Coefficients (APC) for cross-polarization and spillover
  • Slight shift to the 18.7 GHz center observation frequency
  • Adjustment of effective hot-load temperature

Improved Radio Frequency Interference (RFI) flagging in response to new geostationary sources. For more details, see the Remote Sensing Systems RFI page:

  • Replacement of the Geostationary_Satellite_Glint_Angle field with two new fields:


  • For each observation, L2A now includes the location where the reflection vector intersects the geostationary sphere

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