Magnetics GPH 492 John Louie Spring 2010
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Transcript of Magnetics GPH 492 John Louie Spring 2010
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MagneticsGPH 492
John LouieSpring 2010
Sam Saunders, Todd Morine, Miles Kreidler, and Ryan Loux
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Project Methods Data Results Sources of Error
Overview
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Spring Break April 21-26 GPH 492 Field Exercise Magnetic Surveys of 4 transects completed
over 5 days◦ Hidden Valley North◦ Hidden Valley South◦ Prater◦ Whitewood
Project
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One set of 2 magnetometers used◦ 1 Base station◦ 1 mobile station
Equipment was from 1980
Base station magnetometer broke after Day 2
Methods
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Need for base station
Need for calibration of instrument
Methods, continued
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Northing (m) Easting (m) Time Total Magnetic Field (nT) Noise (nT)
Data Collected
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Not what we expected Instrument error suspected
Results
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Results, continued
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Results, continued
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Results, continued
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Instrument Error◦ Low Kerosene in magnetometer◦ Calibration needed?◦ Initial base station calibration
Local interference◦ Any metal objects◦ Power lines◦ Cellular phones
Sources of Error
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Questions?