Radar Clutter Via Waveguide Methods
Abstract
Recent backscatter results generated by Tappert, using parabolic equation and Monte Carlo methods, afford an excellent opportunity to assess the adequacy of concepts such as shadowing and surface tilting often used in concert with ray concepts for line of sight backscatter calculations. In this study, results of first order scatter from rough surfaces are used in conjunction with waveguide formalism to calculate clutter from distant ranges in tropospheric waveguide environments. Comparisons are made with Tappert's results at 9.6 GHz for the standard atmosphere, and for 14 and 28 m evaporation ducts. Results apply to wind speeds of 10, 20, 30 and 40 knots. Averaged backscattered signals calculated by the two methods, for a transmitter altitude of 25 m, agree to within about + or - 10 dB. This is considered surprisingly good agreement in view of the many uncertainties and approximations involved in the calculations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1989
- Accession Number
- ADA220237
Entities
People
- R. A. Pappert