Why do you need a gem base station?

GEM has a special expertise that it has incorporated into all of its base station offerings. The company has long been a standard for magnetic observatories conducting daily and long-term measurements. This experience has allowed GEM to design base stations that are stable, reliable and drift-free – giving the ultimate in accurate results.

How long is a gem base station?

To assist in setting up surveys, GEM provides base stations with standard 10 m cable lengths; which is typically sufficient to locate the base station away from typical noise sources. Other lengths are optional. Survey set up is a fast process, requiring the selection of a location and then positioning the unit.

What is the best base station for your application?

GEM manufactures two, leading solutions for base station applications. Choice of system is based on features but also on the ultimate resolution required. For routine or advanced requirements, a good choice is the Overhauser base station. This system has been upgraded with fast sampling (10 Hz), enhanced memory and noise-free sampling algorithms.

Where should base stations be located?

Guidelines typically call for location of base stations 100 m or more away from large ferromagnetic objects or active roads and highways. It is recommended to operate 200-500 m away from power lines where possible.

Why do we need a base station?

These effects can be quite significant and impose linear “drifts”that affect overall data quality. Use of a base station is important to remove the effects of daily magnetic drifts (diurnals) on the order of a few 10s of nT and micropulsations on the order of thousands of nT from the interaction of the solar wind with the earth’s magnetic field.