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Low-power portable geophysical data acquisition system and its use in geomagnetic measurementsA low-power portable data acquisition system presently in use for geomagnetic measurements is described. The system is composed of a data-processing system containing a low-power microprocessor, a 9-track digital tape recorder, and a rechargeable battery pack. The magnetometer is a low-power three axis fluxgate design. Under program control the data processing system keeps track of time of day and date, samples three analog magnetometer outputs at intervals of either 0.4 or 2 s, digitizes the data to 15-bit resolution, and, depending upon relative magnetic activity, decides upon data compression to increase the tape storage capacity. It also monitors and records internal voltages and provides self-checking functions which may be monitored through a visual readout on the control panel. The system is mounted in a rugged, weather-tight carrying case suitable for use outdoors with minimal protection. The system, including magnetometer, uses 1.6-W power and can store 5.7 Mbytes of data.
Document ID
19810053191
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Medford, L. V.
(Bell Telephone Labs., Inc. Murray Hill, NJ, United States)
Maclennan, C. G.
(Bell Telephone Labs., Inc. Murray Hill, NJ, United States)
Rosenfeld, P. E.
(Bell Telephone Labs., Inc. Murray Hill, NJ, United States)
Lanzerotti, L. J.
(Bell Telephone Laboratories, Inc. Murray Hill, N.J., United States)
Acuna, M. H.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Date Acquired
August 11, 2013
Publication Date
July 1, 1981
Publication Information
Publication: IEEE Transactions on Geoscience and Remote Sensing
Volume: GE-19
Subject Category
Instrumentation And Photography
Accession Number
81A37595
Distribution Limits
Public
Copyright
Other

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