Accession Number : AD0774891

Title :   Omega Envelope Capability for Lane Resolution and Timing.

Descriptive Note : Research and development rept., Jun 72-Nov 73,

Corporate Author : NAVAL ELECTRONICS LAB CENTER SAN DIEGO CA

Personal Author(s) : Swanson, E. R. ; Adrian, D. J.

Report Date : 20 NOV 1973

Pagination or Media Count : 88

Abstract : Reports on an investigation of the feasibility of using Omega pulse envelopes for resolving the Omega lane ambiguity--for sea-air rescue and other navigation and timing applications, Navy and civil. Pulse arrival time measurement accuracy is related to pulse rise time and signal-to-noise ratio (SNR). Required accuracies for three- and four-frequency transmission formats are determined and related to expected SNR. Lane resolution from pulse envelopes is shown to be feasible with a four-frequency signal format. Signal relay times of three minutes or less are required in heavy noise for 0.95 confidence of position location. Preliminary experimental results support calculations. (Author)

Descriptors :   *RADIO NAVIGATION, *SEA RESCUES, *RESCUE EQUIPMENT, HYPERBOLIC NAVIGATION, VERY LOW FREQUENCY, TRANSMITTER RECEIVERS, GLOBAL, FEASIBILITY STUDIES, POSITION FINDING, LOCATORS, SIGNAL TO NOISE RATIO, RADIATION, OMEGA NAVIGATION.

Subject Categories : Navigation and Guidance
      Escape, Rescue and Survival

Distribution Statement : APPROVED FOR PUBLIC RELEASE