Accession Number : AD0915751

Title :   Effects of Polar Cap Absorption Events on the Omega Navigation System.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Brogden, John W.

Report Date : OCT 1973

Pagination or Media Count : 40

Abstract : The Federal Aviation Administration (FAA) sponsored a program at the Naval Research Laboratory (NRL) to investigate the effects of polar cap absorption (PCA) events and other propagation anomalies on the Omega navigation system. Data were collected at NRL and with the cooperation of the Canadian Ministry of Transport at four locations in Canada. A large PCA event occurred during August 1972. Data taken at NRL show that the Composite Omega technique could be used to reduce the error due to this event from about 16 miles to about 3 miles. Since this investigation was conducted during the declining portion of the sunspot cycle, only a few PCA events were observed. (Author)

Descriptors :   *POLAR CAP ABSORPTION), (*RADIO NAVIGATION, (*RADIO INTERFERENCE, POLAR CAP ABSORPTION), VERY LOW FREQUENCY, IONOSPHERIC PROPAGATION, IONOSPHERIC DISTURBANCES, SUNSPOTS, RADIO WAVES, ABSORPTION, ATTENUATION, PHASE DISTORTION, AIRCRAFT, ARCTIC REGIONS.

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE