Effect of Array Tilt on Beam Noise, Signal-to-Noise Ratio, and Detection Opportunity Statistics
Abstract
This study investigates the effect of array tilt on the statistics of noise clutter attributed to ships. In particular, the study calculates the statistics of beam noise, signal-to-noise ratio, and detection opportunities (zero ships on the beam) for a rigid line array of idealized beams without associated sidelobes and for idealized beam noise and signal models. The results are that: The variance of beam noise fluctuations and the probability of zero ships on the beam decrease with array tilt while the mean beam noise level is independent of array tilt; The variance of the signal-to-noise ratio fluctuations decreases with array tilt, while the mean signal-to-noise ratio is constant with array tilt; and The probability of detection opportunities decreases with array tilt and the mean waiting time between detection opportunities increases with array tilt, while the mean duration of detection opportunities is independent of array tilt. Consequently, the central conclusion of the study is that detection performance of a line degrades significantly as the line array tilts from the horizontal plane by small angles.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1977
- Accession Number
- ADC010061
Entities
People
- Carl F. Morey