AN EXPERIMENT WITH A SHORT PATH LENGTH UNATTENDED TROPOSCATTER TELEMETRY LINK IN THE ARCTIC OCEAN,
Abstract
An experiment was performed in the Arctic ocean to evaluate the troposcatter mode of propagation for use as a telemetry tool in obtainin g oceanographic data from remote sites. Data was collected manually and on paper and magnetic tape over a two week period in the spring of 1962. Both transmitting and receiving sites were located at sea level. The path was mainly over ice with some open water leads and length varied from 80 to 62 miles due to ice drift. The data collected was analyzed and compared with various other path loss prediction equations. The measured path loss was generally 20-30 db greater than most equations. Some of the variations could be accounted for by modification of the weighting factor associated with N sub S (surface radio refractive index) due to the different climatic conditions. Further analysis indicated however that, of the various meterological factors that could influence the path loss, wind velocity produced the maximum correlation. A new equation was then derived from the measured data which included a wind velocity factor as well as an NS factor. This derived emperical equation has a standard error of estimate of 5.3 db with 95% confidence. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1964
- Accession Number
- AD0603198
Entities
People
- Beaumont M. Buck
- Walter P. Brown