CONTINUOUS-TRANSMISSION FREQUENCY-MODULATED SONAR RANGE AND RANGE-RATE EQUATIONS.
Abstract
Range and range-rate equations are developed for CTFM sonar. Consideration is given to the exact round-trip distance traveled by the sonar signal and to the doppler effect. Approximate equations are developed for range rates of -40 knots with typical range errors of 0.1, 5.49, and 90.87 percent and typical range-rate errors of 0.22 and 7.44 percent. Partial derivatives are taken of the approximate equations. Figures show range parameters, range as a function of the difference (audio) frequency for two range scales and various range rates (using the exact range equation), and the percentage of error in range and range rate as a function of their variables. Computer-generated solutions of the derived range equation are included in an appendix. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1965
- Accession Number
- AD0479666
Entities
People
- L. A. Smothers
Organizations
- Navy Electronics Laboratory