Satellite studies of magnetospheric substorms on August 15, 1968. 8. Ogo 5 plasma wave observations

Journal Article · Fri Jun 01 04:00:00 EDT 1973 · J. Geophys. Res., v. 78, no. 16, pp. 3119-3130

DOI:https://doi.org/10.1029/JA078i016p03119· OSTI ID:4383837

Scarf, F L; Fredricks, R W; Kennel, C F; Coroniti, F V

We demonstrate that during the expansion phase of each of the three substorms detected by Ogo 5 on August 15, 1968, the plasma wave experiment detected significantly enhanced wave levels. For the two substorms encountered when Ogo was far downstream from earth, the peak turbulence levels were moderate. However, extremely intense signals were detected during the third substorm, when Ogo was closer to earth on auroral L shells. At this time the dominant electric field emission was one with wave frequency near 1.5 times the local electron gyrofrequency, although significant chorus signals were also present later in the expansion phase. We demonstrate that the maximum electric field itensities were sufficiently high to produce strong diffusion for energetic electrons, and we present evidence suggesting that this wave-particle interaction was operative, so that the waves controlled the local pitch angle distributions. (auth)

• Research Organization: Space Sciences Laboratory, TRW Systems Group, Redondo Beach, California, 90278
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-006037
• OSTI ID: 4383837
• Journal Information: J. Geophys. Res., v. 78, no. 16, pp. 3119-3130, Journal Name: J. Geophys. Res., v. 78, no. 16, pp. 3119-3130; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

*MAGNETIC BAYS-- PLASMA WAVES
*MAGNETOSPHERE-- MAGNETIC BAYS
ELECTRIC FIELDS
ELECTRONS
MAGNETIC STORMS
N58300* --Physics (Atmospheric)--Magnetospheric Phenomena
SATELLITES