Interpret the ESM range tables. The ESM program is used to calculate and display the maximum intercept ranges of U.S. and Russian surface emitters by user-specified ESM receivers. This allows the development of an ESM employment plan that maximizes the potential for detecting target emitters. Make sure the environment selected from the refractivity data set is indicative of the location and time of interest. The atmosphere is usually not horizontally homogeneous over these great distances. .
Emitters are limited to a preset list.
Emitter frequencies are nominal frequencies. Intercept ranges of zero indicate that this nominal frequency does not fall within the prescribed receiver s bandwidth. . The ESM program does not account for absorption of EM energy. In general, the absorption of EM energy by things such as oxygen, water vapor, fog, rain, or snow adds little to the propagation loss. Refraction is considered the main factor in transmission. .