A coordinated two-satellite study of energetic electron precipitation events
| Autor: | J. B. Reagan, W. L. Imhof, E. E. Gaines, G. H. Nakano |
|---|---|
| Rok vydání: | 1975 |
| Předmět: |
Physics
Atmospheric Science X-ray spectroscopy Ecology Spectrometer Bremsstrahlung Paleontology Soil Science Flux Electron precipitation Forestry Electron Aquatic Science Oceanography Spectral line Geophysics Space and Planetary Science Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Satellite Atomic physics Physics::Atmospheric and Oceanic Physics Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research. 80:3622-3628 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/ja080i025p03622 |
| Popis: | A new technique for studying the spatial/temporal variations of energetic electron precipitation events is investigated. Data are presented in which precipitating electrons were measured simultaneously on two coordinated polar-orbiting satellites and the bremsstrahlung produced by the electrons precipitating into the atmosphere was observed from one of the satellites. Two electron spectrometers measuring the intensities and energy spectra of electrons of >130 keV were located on the oriented satellite 1971-089A (altitude, approx. =800 km), whereas a single similar spectrometer measuring electrons of >160 keV was located on the spinning low-altitude (approx.750 km) satellite 1972-076B. The X rays of >50 keV were measured with a 50-cm$sup 3$ germanium spectrometer placed on the 1972-076B satellite. With the coordinated data a study is made of events in which large fluctuations were observed in the precipitating energetic electron intensities. In the examples presented the satellite X ray data alone demonstrate that the spatially integrated electron influx was constant in time, and when the X ray data are combined with the direct electron measurements from the two satellites, the resulting data suggest that the major features in the flux profiles were primarily spatial in nature. The combination of X ray and electron measurements from two satellitesmore » is shown to provide an important method for studying and attempting to resolve spatial and temporal effects.« less |
| Databáze: | OpenAIRE |
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