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Study of waves in the earth's bow shock.
- Source :
- Journal of Geophysical Research. 77
- Publication Year :
- 1972
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1972.
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Abstract
- Results of an examination of the perturbation vectors of waves upstream and downstream from the region of maximum compression in the bow shock on Ogo 5 under particularly steady solar-wind conditions. The polarization of the upstream waves was right-hand circular, and that of the downstream waves left-hand elliptical in the spacecraft frame. By observing that the polarization of the waves remained unchanged as the shock motion swept the wave structure back and forth across the satellite three times in eight minutes, it was found that the waves were not stationary in the shock frame. A study of the methods of determining the shock normal indicates that the normal estimated from a shock model should be superior to the normal based on magnetic coplanarity. The propagation vectors of the waves examined did not coincide with the shock-model normal, the average magnetic field, or the plasma-flow velocity. However, the major axis of the polarization ellipse of the downstream wave was nearly parallel to the upstream propagation vector.
- Subjects :
- Geophysics
Subjects
Details
- Language :
- English
- Volume :
- 77
- Database :
- NASA Technical Reports
- Journal :
- Journal of Geophysical Research
- Notes :
- JPL-950403, , NGR-05-007-276
- Publication Type :
- Report
- Accession number :
- edsnas.19720045713
- Document Type :
- Report