Modulated precipitation of radiation belt electrons by controlled signals from VLF transmitters

Journal Article · Mon Aug 01 04:00:00 EDT 1983 · Geophys. Res. Lett.; (United States)

DOI:https://doi.org/10.1029/GL010i008p00615· OSTI ID:5667652

Imhof, W L; Reagan, J G; Voss, H D; Gaines, E E; Datlowe, D W; Mobilia, J; Helliwell, R A; Inan, U S; Katsufrakis, J; Joiner, R G

The first direct observations of the precipitation of radiation belt electrons by the controlled injection of VLF signals from a ground based transmitter were recently reported from data acquired in the SEEP (Stimulated Emission of Energetic Particles) experiment. That outstanding example of time-correlated wave and electron data has now been enhanced by the finding of four additional modulated events out of 65 satellite passes when one of the U. S. Navy VLF transmitters at Cutler, Maine (NAA) or at Annapolis, Maryland (NSS) was being modulated in a 3s ON/2s OFF format. During each of these events the fluxes of precipitating electrons were observed repeatedly to display a characteristic time behavior with respect to the transmitter modulation: a relatively slow rate of increase after start of the ON period leading to a maximum about 2 seconds later. Details of this consistent pattern and the statistics of occurrence of modulation events are presented along with comparisons of the absolute fluxes of precipitating electrons observed during normal transmitter operation with those recorded when one of the transmitters was modulated.

• Research Organization: Lockheed Palo Alto Research Laboratory, Palo Alto, CA 94304
• OSTI ID: 5667652
• Journal Information: Geophys. Res. Lett.; (United States), Journal Name: Geophys. Res. Lett.; (United States) Vol. 10:8; ISSN GPRLA
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
CHARGED-PARTICLE PRECIPITATION
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
ELECTRON DENSITY
ELECTRON PRECIPITATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
MAGNETOSPHERE
PLASMA ACCELERATION
RADIATION BELTS
RADIATIONS
RADIOWAVE RADIATION
TRAPPED ELECTRONS