NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Triaxial digital fluxgate magnetometer for NASA applications explorer mission: Results of tests of critical elementsTests performed to prove the critical elements of the triaxial digital fluxgate magnetometer design were described. A method for improving the linearity of the analog to digital converter portion of the instrument was studied in detail. A sawtooth waveform was added to the signal being measured before the A/D conversion, and averaging the digital readings over one cycle of the sawtooth. It was intended to reduce bit error nonlinearities present in the A/D converter which could be expected to be as much as 16 gamma if not reduced. No such nonlinearities were detected in the output of the instrument which included the feature designed to reduce these nonlinearities. However, a small scale nonlinearity of plus or minus 2 gamma with a 64 gamma repetition rate was observed in the unit tested. A design improvement intended to eliminate this small scale nonlinearity was examined.
Document ID
19780007519
Document Type
Contractor Report (CR)
Authors
Mcleod, M. G. (California Univ. Los Angeles, CA, United States)
Means, J. D. (California Univ. Los Angeles, CA, United States)
Date Acquired
September 3, 2013
Publication Date
April 1, 1977
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Report/Patent Number
IGPP-PUBL-1698
NASA-CR-156664
Funding Number(s)
CONTRACT_GRANT: NAS5-23660
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 19780007519.pdf STI