Accession Number : ADA194503

Title :   TE/TM (Transverse Magnetic/Transverse Electric) Height Profile Measurements of Transpolar VLF (Very Low Frequency) Signals,

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Personal Author(s) : Turtle, John P ; Heckscher, John L ; Kossey, Paul A

PDF Url : ADA194503

Report Date : Oct 1987

Pagination or Media Count : 32

Abstract : Transverse magnetic (TM) and transverse electric (TE) height-gain profiles of eight ground-based transmitters and one airborne transmitter were measured simultaneously by a rocket-borne wideband receiver flown at Thule AB, Greenland, under nighttime conditions. The profile shapes are shown to depend both on ground parameters and on solar illumination conditions over the propagation paths. Significant TM-to-TE conversion was observed for ground-based transmitters located in the night hemisphere, while none was measured for sources in daylight. No TE-to-TM conversion was measured for the airborne transmitter. (Author)

Descriptors :   *POLAR REGIONS, *PROPAGATION, *RECEIVERS, *TRANSMITTERS, AIRBORNE, BROADBAND, DAYLIGHT, GAIN, GREENLAND, GROUND LEVEL, HEIGHT, HEMISPHERES, NIGHT, PARAMETERS, PATHS, PROFILES, ROCKETBORNE, VERY LOW FREQUENCY

Subject Categories : Radiofrequency Wave Propagation
      Electricity and Magnetism
      Geography

Distribution Statement : APPROVED FOR PUBLIC RELEASE