Cryogenic Magnetic Gradiometers for Space Applications

Cryogenic Magnetic Gradiometers for Space Applications

This article proposes the use of superconducting magneticgradiometer, magnetometer sensors based on SQUID technology as sensorsfor space-borne magnetic investigations. The existing state of theart of such sensors is described. Estimates of their performance as spacesensors is made; in particular, it...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing Vol. GE-23; no. 4; pp. 552 - 561
Main Authors: Hastings, Roger, Mahler, Ronald P. S., Schneider, Ray, Eraker, James H.
Format: Journal Article
Language:English
Published: New York, NY IEEE 01-07-1985
Institute of Electrical and Electronics Engineers
Subjects:
Cryogenics
Earth, ocean, space
Exact sciences and technology
External geophysics
Geodesy and gravity
Magnetic field measurement
Magnetic noise
Magnetic sensors
Magnetosphere
Noise level
Sensor phenomena and characterization
Space technology
SQUID magnetometers
Superconducting magnets
Superconductive switch
Measurement accuracy
Shipboard gravimeter
Satellite geodesy
Earth potential
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Description
Summary:This article proposes the use of superconducting magneticgradiometer, magnetometer sensors based on SQUID technology as sensorsfor space-borne magnetic investigations. The existing state of theart of such sensors is described. Estimates of their performance as spacesensors is made; in particular, it is shown that they will provide magneticdata of improved sensitivity and accuracy over conventional magneticsensors. It is also found that gradiometers of the sensitivity proposedhere will aid in the analytic continuation of field data, will allowseparation of magnetic field temporal variations from field changes dueto flight past fixed magnetic sources, will provide the ability to makemeaningful measurements of fixed anomalies on magnetosphericallyactive days, and will allow increased spatial resolution of magneticsources. The requirements for a high-performance space gradiometersensor are described as well as current progress aimed at achievingsuch a sensor. Satellite system requirements are also addressed. Particularattention is given to magnetic noise sources in the sensor environmentand to the problems associated with reducing this noise to thedesired sensor noise levels.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.1985.289448