FURTHER STUDY OF PPI PIP SHAPES IN RELATION TO SONAR TARGET CLASSIFICATION
Abstract
The significance for target classification of the pip shapes displayed by the SQS-23 sonar in comparision to those observed with earlier scanning sonars was studied for a large sample of echos from submarine and nonsubmarine targets. It was found that the descriptive pip shape categories developed for the earlier sonars were inadequate for describing the pips displayed by the SQS-23. This was particularly true for difference brightening and target centered display conditions. Many of the pip shapes were found to be related significantly to target nature in a statistical sense. But, from a practical viewpoint, these relationships were not sufficiently dependable to warrant direct inferences about the target's classification. The most useful function served by pip shape continues to be the opportunity it affords to estimate the orientation of the target's major axis. Important interactions were noted between the pip shape displayed, the target's nature, and the range scale in use on the PPI.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1963
- Accession Number
- AD0345548
Entities
People
- Barbara J. Tabachnick
- Jon C. Rittger
- Robert R. Mackie