Space charge enhanced, plasma gradient induced error in satellite electric field measurements

Details Space charge enhanced, plasma gradient induced error in satellite electric field measurements Space charge enhanced, plasma gradient induced error in satellite electric field measurements

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99..449d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A1, p. 449-458

Physics

3

Earth Magnetosphere, Electric Fields, Instrument Errors, Space Charge, Space Plasmas, Error Analysis, Geomagnetism, Gradients, Plasma Probes, Satellite Observation

Scientific paper

In magnetospheric plasmas it is possible for plasma gradients to casue error in electric field measurements made by satellite double probes. The space charge emhanced plasma gradient induced error is discussed in general terms, the results of a laboratory experiment designed to illustrate this error are presented, and a simple expression that quantifies this error in a form that is readily applicable to satellite data is derived. The simple expression indicates that for a given probe bias current there is less error for cylindrical probes than for spherical probes. The expression also suggests that for Viking data the error is negligible.

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