Radar/Radio Tropospheric Absorption and Noise Temperature
Abstract
Fortran digital-computer routines to calculate absorption loss for radiowave propagation in the troposphere have been developed, and machine plots of radar attenuation as a function of range have been made for a standard atmosphere, over the frequency range 100 MHz to 100 GHz. The tropospheric noise temperature has also been calculated and plotted. This work is an updating of earlier calculations that were less accurate, especially in the frequency range above 10 GHz. Separate curves for the oxygen and water-vapor components of the absorption loss are provided in addition to the curves for total loss; this allows the loss for values of water-vapor density other than the standard 7.5 g/ cu m to be found, by applying a simple multiplicative factor. The computer routines, listed at the end of the report, have also been used as part of a computer program to calculate the maximum range of a radar system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 30, 1972
- Accession Number
- AD0753197
Entities
People
- Lamont V. Blake
Organizations
- United States Naval Research Laboratory