METHOD AND APPARATUS OF BACK LOBE CORRECTION TO ANTENNA TEMPERATURE FOR EARTH-OBSERVING MICROWAVE INSTRUMENTS

摘要

The present invention relates to a method and apparatus which corrects antenna noise temperature in antenna back lobes, for earth-observing microwave instruments on satellites in orbit, to counter signal contamination from celestial bodies. The antenna back lobe signal correction is computer-program-modeled with only a few static and only a few dynamic inputs, and for a given set of parameters (i.e., orbital altitude, pointing characteristics (e.g., nadir or cross-scanning or conical-scanning), frequency selectivity of the receiver/detector) produces a few output files which are then combined by the program to predict the back lobe signal correction which is to be applied.

主权项

1. A method of correcting an antenna noise temperature in an antenna on earth-observing microwave instruments, the method comprising:
providing at least one processor executing program code to implement a correction to the antenna noise temperature in the antenna, said program code including the steps of:
calculating a convolution of a signal from a Galaxy with a full sky map of a pattern of a beam from the antenna;subtracting a part of said Galaxy which is covered by a Sun;subtracting a part of said Galaxy which is covered by a Moon; andsubtracting a part of said Galaxy which is covered by an Earth.