Physical Basis of Ground-Based Radiometric Sensing of Temperature Profiles at 60 GHz

摘要

The physical basis of retrieving atmospheric temperature profiles by means of ground-based radiometric measurements at 60 GHz is analyzed. The profiling capability of different radiometer systems is examined using the statistical inversion method for the atmospheric conditions at Gothenburg-Landvetter Airport for two months, February and July. It is found that a system with 3 - 5 channels operated in an elevation scan mode will yield the best result, provided that the atmosphere is horizontally stratified. The uncertainty of this assumption implies that a practical system should have a zenith-looking antenna. In this case a large number of channels will give an accuracy 10 - 15% better than obtained with the presently available four-channel system.