Ionospheric Research Using Satellites.

Amplitude scintillation records have been obtained of the 136 MHz beacon signal of the polar orbiting satellite NIMBUS 4. The records have been made at Narssarssuaq, Greenland, and cover the local time interval 22-02 of the auroral oval. The average behavior of scintillation versus zenith and azimut...

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Bibliographic Details
Main Authors: Lundbak,Aster, Mikkelsen,Ib Steen
Other Authors: DANISH METEOROLOGICAL INST COPENHAGEN GEOPHYSICAL DEPT
Format: Text
Language:English
Published: 1976
Subjects:
Atmospheric Physics
*IONOSPHERIC SCINTILLATION
GEOMAGNETISM
AURORAE
HIGH LATITUDES
GREENLAND
DENMARK
BEACONS
SCIENTIFIC SATELLITES
SCIENTIFIC RESEARCH
Nimbus 4 satellite
PE62101F
WUAFGL46430104
Greenland
Narssarssuaq
Online Access:http://www.dtic.mil/docs/citations/ADA036046
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA036046
Description
Summary:Amplitude scintillation records have been obtained of the 136 MHz beacon signal of the polar orbiting satellite NIMBUS 4. The records have been made at Narssarssuaq, Greenland, and cover the local time interval 22-02 of the auroral oval. The average behavior of scintillation versus zenith and azimuth is compared to a theoretical index deduced using weak scattering theory. The ionospheric irregularities are represented by a power law spectrum proportional to the inverse 4-th power of k, where k is the irregularity wave number. The comparison shows that the irregularities are elongated along the field lines with an elongation factor equal/to or greater than 2.5. Probably they are also elongated in the magnetic eastwest direction with an elongation factor slightly greater than one. The night time scintillation corrected for geometric variation shows a marked increase when moving from sub-auroral to auroral oval latitudes. (Author)

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