Accession Number:

ADA232457

Title:

Western Pacific Omega Validation Analysis

Descriptive Note:

Final rept. Aug 1989-Aug 1990

Corporate Author:

VISICOM LABS INC SAN DIEGO CA

Personal Author(s):

Report Date:

1990-08-01

Pagination or Media Count:

297.0

Abstract:

This report, the seventh in the Omega Validation series assesses the Omega Very Low Frequency radio navigation system performance in the Western Pacific Ocean area. Our general overview describes 1 a new emphasis for this validations on establishing signal quality through characterizing zones of signal-self-interference, 2 validation planning, 3 measurements, and 4 analysis undertaken. Regions of self-interference due to equatorial zone propagation are predicted and analyzed for each Omega signal. Zones of poor signal interference caused by propagation the long way around the world long- path are predicted and assessed. Navigation accuracy and signal coverage is assessed. For most of the validation region Omega fully meets navigation expectations. The prediction guidance in the form of Propagation Phase Corrections, zones of poor signal quality Modal and Long-path, and Station Coverage are largely correct. A relatively small but highly significant zone of predicted inadequate coverage during certain periods of the day was identified and assessed. Navigation support in this zone, which extends approximately between latitude 20 deg. N and 5 deg. S and between longitude 105 deg. E and 120 deg. E, was found to be unreliable at night during periods of strong atmospheric noise.

Subject Categories:

  • Cybernetics
  • Navigation and Guidance
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE