Limiting Interference to Satellites in the Space Science Services from the Emissions of Trans-Horizon Radio-Relay Systems in the Bands 2 025-2 110 MHz and 2 200-2 290 MHz
This Annex summarizes the results of computer simulations to determine the statistics of interference to low-orbiting satellites from the emissions of a single trans-horizon radio-relay station. Several cases were evaluated. In a typical case, a single trans-horizon station was located at a specified latitude. The antenna was positioned at an elevation angle of 1° and at an azimuth angle of 0 to 350° in 10° steps. Interference to a low-orbiting satellite for each azimuth angle of the trans-horizon station transmitting antenna was calculated in 3 s increments over a simulated period of 30 days. The output of the simulation was the cumulative probability of interference as a function of interference power density level. The major parameters used in the simulations are listed in Table 1.