Analysis of proton and electron spectrometer data from OGO-5 spacecraft. Final report, 1 July 1973--31 July 1974

Technical Report · Thu Feb 13 04:00:00 EST 1975

OSTI ID:4150381

Pomerantz, M A

The interaction between the geomagnetic and interplanetary magnetic fields is studied through its effects upon the intensities of solar electrons reaching the polar caps during times of strongly anisotropic electron fluxes in the magnetosheath. During the particle event of November 18, 1968, electrons of solar origin were observed outside the magnetopause with detectors aboard OGO-5. Correlative studies of these satellite observations and concurrent measurements by riometers and ionospheric forward scatter systems in both polar regions revealed that the initial stage of the associated polar cap absorption event is attributable to the arrival of solar electrons. Evidence of a north-south asymmetry in the solar electron flux, at a time when the interplanetary magnetic field vector was nearly parallel with the ecliptic plane, supports an open magnetospheric model. The analysis indicates that an anisotropic electron flux may be isotropized at the magnetopause before propagating into the polar regions. (auth)

• Research Organization: Bartol Research Foundation, Swarthmore, Pa. (USA)
• NSA Number: NSA-33-003878
• OSTI ID: 4150381
• Report Number(s): N--75-17020; NASA-CR--142078
• Country of Publication: United States
• Language: English

Related Subjects

*GEOMAGNETIC FIELD-- ELECTRON DENSITY
*INTERPLANETARY MAGNETIC FIELDS
640107* --Physics Research--Astrophysics & Cosmology-- Planetary Phenomena
ANISOTROPY
ELECTRONS
MAGNETOPAUSE
N56700* --Physics (Astrophysics & Cosmology)--Planetary Phenomena
OGO SATELLITES
POLAR REGIONS
POLAR-CAP ABSORPTION
SOLAR PARTICLES