37 GHz和94 GHz的大气微波衰减比较分析
摘要
Millimeter-wave is close to the size of cloud particles, so millimeter-wave radar has now been constructed and operated for cloud observations. In the CloudSat Mission there will be a 3-millimeter cloud profile radar (CPR). It is very interesting to investigate the combination of CloudSat/CPR with TRMM/PR which has been in space to get the information of the vertical structure of clouds from thin to thick clouds. Thereinto, the correction of attenuation is a big problem in millimeter-wave cloud radar detection. A study of the characteristics of atmospheric attenuation at 37 and 94 GHz is presented in this paper. The primary aim of this study is to provide some basic information to the atmospheric correction for 94 GHz cloud radar. The atmospheric attenuation at 37 and 94 GHz have been calculated and analyzed in different cloudy atmospheres. The feasibility of performing the correction is discussed on the basis of dual- or triple- wavelength transmission and backscattering measurements.