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General Matrix Inversion Technique for the Calibration of Electric Field Sensor Arrays on Aircraft PlatformsA matrix calibration procedure has been developed that uniquely relates the electric fields measured at the aircraft with the external vector electric field and net aircraft charge. The calibration method can be generalized to any reasonable combination of electric field measurements and aircraft. A calibration matrix is determined for each aircraft that represents the individual instrument responses to the external electric field. The aircraft geometry and configuration of field mills (FMs) uniquely define the matrix. The matrix can then be inverted to determine the external electric field and net aircraft charge from the FM outputs. A distinct advantage of the method is that if one or more FMs need to be eliminated or deemphasized [e.g., due to a malfunction), it is a simple matter to reinvert the matrix without the malfunctioning FMs. To demonstrate the calibration technique, data are presented from several aircraft programs (ER-2, DC-8, Altus, and Citation).
Document ID
20080018897
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Mach, D. M.
(Alabama Univ. Huntsville, AL, United States)
Koshak, W. J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 24, 2013
Publication Date
September 1, 2007
Publication Information
Publication: Journal of Atmospheric and Oceanic Technology
Volume: 24
Issue: 9
Subject Category
Electronics And Electrical Engineering
Distribution Limits
Public
Copyright
Other

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