COMMUNICATIONS RELIABILITY OF TRANSMISSIONS FROM NAVAL RADIO STATION (T) , JIM CREEK, WASHINGTON, NPG AT 24.0 KC/S.
Abstract
In 1963, the operating frequency of the VLF transmitting station NPG, located near Seattle, Washington, was changed from 18.6 kc to 24.0 kc. Tests were conducted to predict the communication reliability of the NPG 24.0 kc transmissions in the western Pacific Ocean area. Comparison of the experimental and predicted data show very good agreement. The received field strengths, as observed, were slightly higher than predicted. The predicted atmospheric noise levels showed very close agreement with the measured data. The observed communication reliability was about 76% for manual cw, and was predicted to be about 52%. For automatic teletype, the observed and predicted reliabilities were 84 and 62%, respectively. Therefore, for the ocean area in the vicinity of southeast Japan, the reliability of NPG 24.0 kc transmissions, assuming a radiated power of 250 kw, would be better than predicted.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1966
- Accession Number
- AD0369391
Entities
People
- W. E. Garner
Organizations
- United States Naval Research Laboratory