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

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...

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Bibliographic Details
Main Authors: Turtle, John P, Heckscher, John L, Kossey, Paul A
Other Authors: ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
Format: Text
Language:English
Published: 1987
Subjects:
Radiofrequency Wave Propagation
Electricity and Magnetism
Geography
*POLAR REGIONS
*PROPAGATION
*RECEIVERS
*TRANSMITTERS
AIRBORNE
BROADBAND
DAYLIGHT
GAIN
GREENLAND
GROUND LEVEL
HEIGHT
HEMISPHERES
NIGHT
PARAMETERS
PATHS
PROFILES
ROCKETBORNE
VERY LOW FREQUENCY
PE62715H
WURADCR2480001
Greenland
Thule
Online Access:http://www.dtic.mil/docs/citations/ADA194503
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA194503
Description
Summary: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)

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