Cyclotron side band emissions from magnetospheric electrons

Technical Report · Thu May 01 04:00:00 EDT 1975

OSTI ID:7139334

Maeda, K

Very low frequency emissions with subharmonic cyclotron frequency from magnetospheric electrons were detected by the S(3)-A satellite (Explorer 45), whose orbit is close to the magnetic equatorial plane, where the wave-particle interaction is most efficient. These emissions were observed during the main phase of a geomagnetic storm in the nightside of the magnetosphere outside of the plasmasphere. During the event of these side-band emissions, the pitch angle distributions of high-energy electrons (greater than 50 keV) and of energetic protons (greater than 100 keV) showed remarkable changes with time, whereas those of low energy electrons and protons remained approximately isotropic. In this type of event, emissions consist essentially of two bands, the one below the equatorial electron gyrofrequency, and the other above. The emissions below are whistler mode, and the emissions above are electrostatic mode. (auth)

• Research Organization: National Aeronautics and Space Administration, Greenbelt, Md. (USA). Goddard Space Flight Center
• OSTI ID: 7139334
• Report Number(s): N-75-26842/5ST; NASA-TM-X-70914; X-602-75-121
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FREQUENCY RANGE
INCLINATION
KHZ RANGE
KHZ RANGE 01-100
LEPTONS
MAGNETIC STORMS
MAGNETOSPHERE
NOISE
PLASMA WAVES
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
TIME DEPENDENCE
WHISTLERS