Abstract
A three component digital fluxgate magnetometer is described for use in Geomagnetic Deep Sounding experiments. The magnetometer is small, completely self contained and requires only a few minutes to install in the field. The design incorporates an INTEL 8748 microprocessor which allows the power consumption to be reduced such that three months of data, at 1min sampling interval are obtained using only two small 10 AH lead acid gel batteries. The data are recorded digitally on a magnetic C-60 cassette tape, and transferred via a specially designed tape reader, to a main frame computer within a few hours. The magnetometer has a resolution of 1nT, and its drift, when properly thermostatted by burial, is less than 1nT per day. Noise is about 0.6nT and variations with periods greater than 5min are faithfully recorded. The magnetometer has a dynamic range of ±80, 000nT. Its low cost allows 2-D arrays to be constructed with a modest budget.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
