Lorad Test of 29-30 October 1957.
Abstract
A Lorad echo-ranging test was made at a range of 88 miles, using a frequency of 700 cps. The target submarine recorded the transmissions from the echo-ranging submarine to aid in the analysis. Object of the test was to determine the characteristics of echo-ranging in the third convergence zone. Echoes were obtained over the 4000-yard range interval from 173.7 to 177.7 kiloyards for about 80 per cent of the transmissions. Unsuccessful transmissions could be attributed in general to high propagation losses. The scatter in range measurements was + or - 100 yards. Target strengths were 25 db for beam aspect (270 deg) and 22 db for target aspect of 248 deg. It is estimated that, under favorable reverberation conditions, the effective echo-ranging width of the third convergence zone could be increased to about 8000 yards by a 10-db improvement in echo-to-noise ratio. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 22, 1958
- Accession Number
- ADA066693
Entities
People
- M. A. Pedersen
Organizations
- Navy Electronics Laboratory