Magnetics GPH 492 John Louie Spring 2010

MagneticsGPH 492

John LouieSpring 2010

Sam Saunders, Todd Morine, Miles Kreidler, and Ryan Loux

Project Methods Data Results Sources of Error

Overview

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

One set of 2 magnetometers used◦ 1 Base station◦ 1 mobile station

Equipment was from 1980

Base station magnetometer broke after Day 2

Methods

Need for base station

Need for calibration of instrument

Methods, continued

Northing (m) Easting (m) Time Total Magnetic Field (nT) Noise (nT)

Data Collected

Not what we expected Instrument error suspected

Results

Results, continued

Results, continued

Results, continued

Instrument Error◦ Low Kerosene in magnetometer◦ Calibration needed?◦ Initial base station calibration

Local interference◦ Any metal objects◦ Power lines◦ Cellular phones

Sources of Error

Questions?