Citation
Abstract
With potential future deployment of high-density terrestrial communication systems in metropolitan areas, it becomes necessary to estimate potential interference received at the Deep Space Network (DSN) Earth station from interfering sources distributed in the region. A fundamental parameter required for any realistic interference analysis is the propagation loss from the transmitter to the receiver, which depends in a statistical way on the atmospheric conditions. This article introduces a method of constructing a map of propagation losses covering almost every possible location in the region, taking the terrain into account. The losses were computed with a high-resolution terrain map of the region as input, together with the heights of the transmitting and receiving antennas. The calculation includes three clearair propagation mechanisms: diffraction, tropospheric scattering, and atmospheric ducting, in accordance with the algorithms given in the International Telecommunication Union Recommendation ITU-R P.452. The resulting numerical database provides propagation-loss data necessary for interference calculations. To enhance visualization, these propagation-loss data are mapped in color. The color-coded propagation loss map provides a visible overview of the entire region of interest, indicating areas where emissions from the terrestrial sources would be effectively shielded by the terrain from reaching the DSN Earth stations, and where such emissions should be restricted for lack of terrain shielding.
Details
- Volume
- 42-162
- Published
- August 15, 2005
- Pages
- 1–20
- File Size
- 649.4 KB