Accession Number : ADA018037

Title :   Effects of High Latitude Geophysical Events on VHF Aeronautical Navigation Aids.

Descriptive Note : Final rept. on Task A,


Personal Author(s) : Rasmussen,Ronald D.

Report Date : SEP 1975

Pagination or Media Count : 83

Abstract : This study was initiated to experimentally determine what effect, if any, geophysical disturbances such as auroras, solar flares and magnetic storms have on VHF aeronautical navigation aids, in particular VOR, in high latitude regions. Recording VOR monitor stations were designed and assembled and subsequently installed at Ester Dome (Fairbanks VOR), Pedro Dome (Fairbanks VOR), and Hoonah (Sisters Island VOR). These monitor stations employed aircraft navigation receivers and antennas to duplicate, as much as possible, aircraft operating conditions. Continuous data were collected over a 10-1/2 month period. Radial course deviation and signal strength were recorded and compared with the geophysical data normally collected by the Geophysical Institute over the same period of time. No appreciable effects on short range navigation signals were produced by solar fluxes, magnetic storms, and substorms, auroras, or solar noise.

Descriptors :   *Ionospheric disturbances, *Navigational aids, *Atmospheric disturbances, Very high frequency, Aurorae, Magnetic storms, Solar flares

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE