An optimal numerical filter for widefieldofview measurements of earthemitted radiation
Abstract
A technique is described in which all data points along an arc of the orbit may be used in an optimal numerical filter for widefieldofview measurements of earth emitted radiation. The statistical filter design is derived whereby the filter is required to give a minimum variance estimate of the radiative exitance at discrete points along the ground track of the satellite. An equation for the optimal numerical filter is given by minimizing the estimate error variance equation with respect to the filter weights, resulting in a discrete form of the WienerHopf equation. Finally, variances of the errors in the radiant exitance can be computed along the ground track and in the cross track directions.
 Publication:

American Meteorological Society
 Pub Date:
 November 1981
 Bibcode:
 1981ams..confR....S
 Keywords:

 Atmospheric Heat Budget;
 Digital Filters;
 Numerical Analysis;
 Radiation Measurement;
 Terrestrial Radiation;
 Earth Radiation Budget Experiment;
 Infrared Radiation;
 Optimization;
 Geophysics