An overview of MMW radar reflectivity

An overview is given of millimeter-wave (MMW) reflectivity data that is being used to form a reflectivity database for radar systems´ developers. A summary of land reflectivity at 35 GHz and 95 GHz is presented. The material discussed is limited to land clutter reflectivity at 35 GHz and 95 GHz in terms of its spatial distributions, i.e. averages (means) and standard deviations. These are compared as a function of type or class of land clutter. The dependence on incident angle, frequency, frequency bandwidth, polarization, and resolution is described. The data consistency problems are noted. This summary is based on readily available reports and articles generated over the last 10 years. The general dependencies seen in the data, the type of information available, and caution which the user must exercise when applying the data are discussed