Modeling EM Propagation Characteristics

Abstract

This purpose of this study was to compare and evaluate Tactical Decision Aid (TDA) input of upper air profiles, i.e. rawinsonde and mesoscale model, in the modeling of electromagnetic (EM) propagation characteristics with a focus on the identification of trapping layers and ducting layers affecting shipboard sensor propagation characteristics. In situ rawinsonde data and time/location specific Regional Air Force MM5 model forecast upper air soundings served as input for the TDA. The evaporation duct height was extrapolated, using observed SST and surface wind speed, surface wind direction, and air temperature, and appended to the in situ and modeled upper air soundings.