LONG BASELINE CORRELATION EXPERIMENTS
Abstract
A preliminary experiment to measure the existence of signal coherency over very long baselines is described. Data for these measurements was obtained by NRL with the cooperation of USNUSL in allowing collaboration with their previously scheduled ARTEMIS propagation experiment. The data was recorded at SOSUS stations, mostly by NRL personnel for data processing at the Laboratory via digital computer. Initial results indicate the correlation coefficient of about 0.35 observed for one data run over a baseline distance of 450 nm. Additional field collection and laboratory analysis are planned to establish the range of possible values with greater accuracy and consistency. These studies are believed relevant to Navy needs, as follows: (1) research evaluation of methods of on-line processing of signals brought to a central point from several SOSUS arrays; (2) study of long range acoustic propagation to widely separated reception points; and (3) consideration of methods of target localization by triangulation from two or more widely spaced arrays. In addition to the above, there is some indication of possible jamming effects on SOSUS stations in the upper portion of the frequency range, by pseudo-random noise signals of sequence length utilized for this experiment. Follow-on experiments to further illuminate the above problem areas are planned.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 25, 1967
- Accession Number
- AD0383241
Entities
People
- D. C. Coulter
- H. L. Peterson
Organizations
- United States Naval Research Laboratory