Magnetic fields in Venus nightside ionospheric holes - Collected Pioneer Venus Orbiter magnetometer observations

Details Magnetic fields in Venus nightside ionospheric holes - Collected Pioneer Venus Orbiter magnetometer observations Magnetic fields in Venus nightside ionospheric holes - Collected Pioneer Venus Orbiter magnetometer observations

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9710267l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. E6, June 25, 1992, p. 10,267-10,282.

Physics

6

Ionospheric Electron Density, Magnetometers, Pioneer Venus 1 Spacecraft, Planetary Magnetic Fields, Venus Atmosphere, Ionospheric Disturbances, Satellite Instruments, Solar Wind

Scientific paper

The magnetic fields detected by the Pioneer Venus Orbiter (PVO) magnetometer within the electron density depletions called 'holes' in the nightside ionosphere are typically larger and more organized than the fields in the surrounding ionosphere. Moreover, they have substantial sunward/antisunward components which cause them to appear as near-radial fields near the antisolar point. The collection of observations presented here illustrate the variety of appearances of the fields in holes. Some new results which summarize their average properties, their dependence on solar wind conditions, and their lack of geographical control are aslo presented. These results are potentially pertinent to the interpretation of data from the PVO entry at the end of 1992 and from the impending Mars Obsever mission, which will probe the magnetic fields in the low-altitude wake of weakly magnetized Mars.

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