Detection of Fluctuating Sonar Targets
Abstract
Fluctuations are characteristic of sounds in the sea. They affect detection by causing the detection probability of weak signals to be higher, and of strong signals to be lower, than in the absence of fluctuations. The effect can be expressed quantitatively by means of receiver operating characteristic (ROC) curves having a fluctuation index k as a parameter. The fluctuation- modified ROC's are found to be similar to conventional ROC's for non-fluctuating signals (k=1), but on probability coordinates have a slope that depends on the value of k. The application of the new ROC's is limited at the present time by a lack of knowledge concerning signal fluctuations and the values of k applicable to a given sonar detection problem.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 26, 1972
- Accession Number
- AD0744646
Entities
People
- G. C. Gaunaurd
- R. J. Urick
Organizations
- Naval Ordnance Laboratory