Ground-Based Radiometric Measurements of Slant Path Attenuation in the V/W Bands
Technical Report,01 Oct 2012,30 Sep 2015
Air Force Research Laboratory/RITE Rome United States
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Ground-based radiometric techniques were applied to measure the slant path attenuation cumulative distribution functionto over 20 dB of attenuation and to less than 1 percent exceedance probability at the V and W band frequencies of 72.5 and82.5 GHz. A model based approach was used to invert brightness temperature to attenuation. An atmospheric model relevant to the geographic location and statistically representative of the attenuating conditions was developed for this purpose. Monte-Carlo solutions to the radiative transfer equation for the precipitating atmosphere were used to generate the attenuation retrieval algorithm.