Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82..603i&link_type=abstract
Journal of Geophysical Research, vol. 82, Feb. 1, 1977, p. 603-617. Research supported by the University of Southern California
Astronomy and Astrophysics
Astronomy
3
Pioneer 10 Space Probe, Pioneer 9 Space Probe, Plasma Diagnostics, Solar Flares, Solar Wind, Interplanetary Space, Ion Distribution, Nasa Programs, Proton Energy, Shock Wave Propagation, Spaceborne Astronomy
Scientific paper
Observations are presented of the changes in the solar wind proton parameters at 0.8 and 2.2 AU as a result of the solar flares in August 1972. These observations were obtained by the NASA Ames Research Center solar wind plasma analyzer experiments on Pioneer 9 and Pioneer 10. High time resolution measurements are presented of the solar wind proton speed associated with the arrival of the interplanetary shocks at Pioneer 9 and Pioneer 10. For these events, differential ion energy per unit charge spectra are shown which indicate the changes in the solar wind ion distribution function associated with the arrival of each of the interplanetary shocks. Four fast shocks are identified at Pioneer 9, and it is found that previously the time of arrival of the first interplanetary shock at Pioneer 9 was not correctly identified. Two fast shocks and one reverse shock are identified at Pioneer 10.
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