Terrestrial kilometric radiation: 2-emission from the magnetospheric cusp and dayside magnetosheath

Technical Report · Tue Jun 01 00:00:00 EDT 1976

OSTI ID:7112439

Alexander, J K; Kaiser, M L

Measurements of the location of sources of terrestrial kilometric radiation obtained with the lunar orbiting Radio Astronomy Explorer-2 satellite have revealed a class of emission associated with the cusp and dayside magnetosheath. At frequencies near 250 kHz this emission is observed at radial distances between 2 and 20 R/sub E/ at magnetic latitudes of 75 deg to 80 deg and is most often detected during periods of auroral activity (AE approximately = 250) and southward orientation of the interplanetary magnetic field vertical component. During very disturbed times, the emission at the lowest frequencies (< or approximately= 200 kHz) appears to come from the dayside magnetosheath at distances approximately = 12 R/sub E/. Whenever the geomagnetic dipole is tilted significantly with respect to the ecliptic pole (> or approximately = 10 deg) the cusp emission is confined to the hemisphere containing the subsolar point. The measurements also suggest that the region of cusp emission is rather narrowly confined in longitude to within +- a few hours of the noon meridian. (auth)

• Research Organization: National Aeronautics and Space Administration, Greenbelt, MD (USA). Goddard Space Flight Center
• OSTI ID: 7112439
• Report Number(s): N-76-27752; NASA-TM-X-71152; X-695-76-139; TRN: 77-011020
• Resource Relation: Other Information: Subm-Submitted for Publication
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MAGNETOSHEATH
LONG WAVE RADIATION
AURORAE
EMISSION
MAGNETIC STORMS
MAGNETOSPHERE
POLAR REGIONS
SOLAR WIND
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
RADIATIONS
RADIOWAVE RADIATION
SOLAR ACTIVITY
640203* - Atmospheric Physics- Magnetospheric Phenomena- (-1987)