Propagational Assessment of VLF Navigation Signals in North America and the North Atlantic.

• Main Authors: Swanson, E. R., Dick, M. J.
• Other Authors: NAVAL ELECTRONICS LAB CENTER SAN DIEGO CA
• Format: Text
• Language: English
• Published: 1975
• Subjects: Navigation and Guidance; *RADIO SIGNALS; *RADIO NAVIGATION; UNITED STATES; SIGNAL TO NOISE RATIO; ALASKA; RADIO TRANSMISSION; NORTH ATLANTIC OCEAN; FIELD INTENSITY; VERY LOW FREQUENCY; OMEGA NAVIGATION; DOT/4IZ/ID; North Atlantic; Alaska
• Online Access: http://www.dtic.mil/docs/citations/ADA013092; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA013092

Requirements for vlf navigation signals are summarized. Various signals, both vlf communications and Omega and both day and night, are evaluated theoretically. Signal-to-noise ratio and signal structure are considered. Special attention is directed toward the continental United States, the North Atlantic, and Alaska. Numerous useful signals are available, but potential cycle slippage is indicated on most vlf communications signals.