Daytime F layer trough and its relation to ionospheric-magnetospheric convection

Technical Report · Fri Dec 01 00:00:00 EST 1989

OSTI ID:6864786

Whalen, J A

The daytime F layer trough is studied by means of an extensive network of ground-based ionospheric sounders in the northern hemisphere under conditions of solar maximum near winter solstice. The trough is observed to be a continuous band having an instantaneous extent of thousands of kilometers consisting of depletions in the daytime electron density, often by an order of magnitude. It lies in regions of sunward ionospheric-magnetospheric convection, an afternoon sector corresponding to the dusk cell, a morning sector corresponding to the dawn cell, and morphology and activity dependence consistent with convection. As detected in the diurnal distributions of f(o)F(2), the trough is a persistent feature at high latitudes, appearing on each day of a 31-day period of continuous observation, and, although highly variable from day to day, is apparent in the monthly medians.

• Research Organization: Air Force Geophysics Lab., Hanscom AFB, MA (USA)
• OSTI ID: 6864786
• Report Number(s): AD-A-219742/4/XAB; GL-TR-90-0055
• Resource Relation: Other Information: Pub. in Jnl. of Geophysical Research, Vol. 94, No. A12, 17169-17184(1 Dec 1989)
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
F REGION
ELECTRON DENSITY
CONVECTION
DAILY VARIATIONS
EARTH MAGNETOSPHERE
IONOSONDES
LATITUDE EFFECT
MORPHOLOGY
NORTHERN HEMISPHERE
EARTH ATMOSPHERE
EARTH PLANET
ELECTRONIC EQUIPMENT
ENERGY TRANSFER
EQUIPMENT
GEOGRAPHICAL VARIATIONS
HEAT TRANSFER
IONOSPHERE
MASS TRANSFER
PLANETARY IONOSPHERES
PLANETS
RADIO EQUIPMENT
VARIATIONS
640201* - Atmospheric Physics- Auroral
Ionospheric
& Magetospheric Phenomena