Airborne studies of equatorial F layer ionospheric irregularities

Details Airborne studies of equatorial F layer ionospheric irregularities Airborne studies of equatorial F layer ionospheric irregularities

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.4631w&link_type=abstract

Journal of Geophysical Research, vol. 85, Sept. 1, 1980, p. 4631-4641. Research supported by the U.S. Defense Nuclear Agency an

Astronomy and Astrophysics

Astronomy

5

Airborne Equipment, Equatorial Atmosphere, F Region, Ionospheric Disturbances, Airglow, Astronomical Photometry, Ionospheric Electron Density, Scintillation

Scientific paper

The motion of F region airglow depletions, spread F, and scintillation producing irregularities which are all associated with the low-density bubbles in the postsunset equatorial ionosphere are examined using photometer, ionosonde, and satellite amplitude scintillation measurements. The 6300 A airglow depletions, (the optical bottomside signature of low plasma density within the bubbles), are described in relation to variations in the F layer virtual height and to the occurrence of amplitude scintillations. Average bottomside electron density depletions of approximately 66% within bubbles near the magnetic equator and near the southern Appleton anomaly are estimated. Latitudinal variations in the maximum poleward extent of airglow depletions and of ionospheric irregularities which produce amplitude scintillations are interpreted, using field line mapping, as variations in the maximum altitude of plasma bubbles over the magnetic equator. The pattern of airflow depletions and associated ionospheric irregularities is verified to extend across the magnetic equator to + or - 15 deg magnetic latitude. The irregularities may affect the transionospheric communication links.

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