Land mobile radio system performance model for VHF and higher frequencies over irregular terrain

A model is described which may be used to predict land mobile radio system performance over irregular terrain. The model uses a semi-empirical formulation to calculate propagation losses from a selected base-station location to surrounding mobile locations within a variable-size "box" not exceeding two degrees latitude by two degrees longitude. Terrain data is obtained from a computer-accessible data base. The output is a plot showing contours of constant propagation loss, power density, or available received power.