Footprint matching for the advanced technology microwave sounder

In a recent paper, the author demonstrated that in order for the ATMS to have the same impact on NWP or sounding as the AMSU/MHS, there will have to be some kind of footprint matching or averaging. In that paper, a simple averaging was done of the smaller fields of view to the largest field of view at the -3dB level. In this paper, I will explore an alternative method where the smaller fields of view are convoluted with the largest fields of view at the -20dB level, which accounts for 99% of the radiation received by the sensor. This proposed method is similar to Backus-Gilbert, with the exception that no assumptions are made about the antenna pattern, such as assuming an effective Gaussian shape. The measured antenna pattern is mathematically modeled to a high degree of accuracy permitting convolution with good fidelity.