Multifrequency Measurements of Radar Ground Clutter at 42 Sites. Volume 2. Appendices A through D
Abstract
This report determines how ground clutter strength varies with RF frequency from VHF to X-Band in ground sited radar. This determination is accomplished by providing extensive empirical results from multifrequency clutter measurements conducted at 42 different sites widely dispersed over the North American continent. These results indicate that the frequency dependence of ground clutter strength depends upon terrain type and can vary, for example, from a strongly decreasing function of frequence in forest to a strongly increasing function of frequency in farmland. Five major terrain categories are defined that encompass this dependence, namely, urban, mountain, forest, farmland and desert. Within each terrain category results are also shown to be dependent upon the relief or roughness of the terrain and upon the depression angle at which the terrain is illuminated. The depression angle dependence is important even for the very low angles and small variations in angle that occur in ground-sited radar. This report presents specific clutter strength results at each of five frequencies (VHF,UHF, L-, S- and X-band) from each of 42 sites at which measurements were conducted. The report then combines results from similar sites to obtain the general dependence of clutter strength versus frequency for each terrain category.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 15, 1991
- Accession Number
- ADA246711
Entities
People
- J. B. Billingsley
- J. F. Larrabee
Organizations
- Massachusetts Institute of Technology