The purpose of this web page is to illustrate the difference between ABI and MODIS visible and near IR channels.  AVIRIS data from the SCAR-B field experiment was used to simulate the ABI and MODIS channels using the respective spectral response functions (SRFs).  For these differences to have meaning there must be a reference point for comparison.  Below is a spectral plot of a clear and cloudy scene over the SCAR-B scene.  Notice radiance values going between a clear sky and a cloudy sky can differ as much as eight watts.  Refer to this image when attempting to deduce the signficance of the following difference images.

Above: ABI 0.48um - MODIS 0.48um Difference Image.  See below for difference image histogram.



Above: ABI 0.48um - MODIS 0.48um difference image histogram.  Notice how the difference between ABI and MODIS is quite small.



Above: ABI 0.555um - MODIS 0.555um Difference Image.  See below for difference image histogram.



Above: ABI 0.555um - MODIS 0.555um difference image histogram.  Notice how the difference between ABI and MODIS is quite small.



Above: ABI 0.86um - MODIS 0.86um Difference Image.  See below for difference image histogram.



Above: ABI 0.86um - MODIS 0.86um difference image histogram.  Notice how the difference between ABI and MODIS is quite small.



Above: ABI 1.38um - MODIS 1.375um Difference Image.  See below for difference image histogram.



Above: ABI 1.38um - MODIS 1.375um difference image histogram.  Notice how the difference between ABI and MODIS is quite small.



Above: ABI 1.61um - MODIS 1.64um Difference Image.  See below for difference image histogram.



Above: ABI 1.61um - MODIS 1.64um difference image histogram.  Notice how the difference between ABI and MODIS is quite small.



Above: ABI 2.21um - MODIS 2.13um Difference Image.  See below for difference image histogram.



Above: ABI 2.21um - MODIS 2.13um difference image histogram.  Notice how the difference between ABI and MODIS is quite small.