Analysis of coordinated observations in the region of the dayside polar cleft. Final report, 23 October 1985-22 October 1987

Technical Report · Fri Apr 01 04:00:00 EST 1988

OSTI ID:6493971

Carpenter, D L; Clauer, C R

The objective was to develop electrodynamic models of the connectivity of the dayside high-latitude ionosphere with the magnetosphere and solar wind. This is accomplished through the coordinated analysis of a variety of electrodynamic observations utilizing correlative satellite and ground data acquired in the vicinity of the polar cleft. Very strong evidence is found for a direct electrical connection between utilizing large scale field-aligned currents in the cleft region reproduces many of the time varying features in the observed high latitude ionospheric electrical fields and plasma convection. The small-scale current structures and expected ionospheric signatures are examined from localized coupling which would be expected from flux transfer events. Analysis of high latitude magnetic data from an array of magnetometers around Sondre Stromfjord Greenland show impulsive events. These magnetic signatures are shown to result from pairs of small scale field-aligned current filaments moving tailward at about 4 Km/sec over the array of stations. These events, however, are inconsistent with present models of FTE current systems.

• Research Organization: Stanford Univ., CA (USA). Space, Telecommunications and Radioscience Lab.
• OSTI ID: 6493971
• Report Number(s): AD-A-200627/8/XAB
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALIGNMENT
DOCUMENT TYPES
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
ELECTRODYNAMICS
GREENLAND
GROUND LEVEL
INTERACTIONS
IONOSPHERE
LEVELS
MAGNETIC FIELDS
MAGNETOMETERS
MEASURING INSTRUMENTS
PLANETARY IONOSPHERES
POLAR CUSP
PROGRESS REPORT
PULSES
SOLAR ACTIVITY
SOLAR WIND