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A compact, lightweight and reliable magnetometer backpack

Ground based magnetometer systems haven’t changed much in 12 years. The most recent change was in 2001 with the inclusion of a GPS in most magnetometers when selective availability was turned off. This greatly increased the efficiency of surveys since only one operator was required to conduct a survey and they could walk continuously without […]

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A ground magnetometer survey gone bad. Very bad.

A news report from Tsodilo Resources (TSX:TSD) on July 22nd 2013 caught my eye: A total of 63.70 line kilometers [of ground magnetics] was covered during the month of June as area totaling 2.53 km2. The expected monthly target is 360 line kilometers for the month and the shortfall is largely attributed to machine malfunction […]

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Used GSM-19 Overhauser magnetometer for sale. With GPS and navigation.

Modern Mag currently has for sale a < 1 year old GEM Systems GSM-19 Overhauser magnetometer with built in GPS and navigation. This magnetometer has mostly been used as a base station and thus is near new. It has the latest Novatel OEMstar GPS and firmware. The console also has the latest firmware and navigation […]

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Is the potassium magnetometer (GSMP-35) right for you?

The GEM Systems GSMP-35 potassium magnetometer is an optically pumped potassium vapor magnetometer. The GSMP-35 is also known as the “k-mag” just as Cesium magnetometers are know as “Cs-mags”.  As of August 2013, GEM Advanced Magnetometers is the ONLY company offering these magnetometers to the market. The GSMP-35 is the most sensitive magnetometer commercially available. By […]

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Caesium Magnetometers. When Sales and Science Collide.

Modern Mag has created a backpack that can replace the standard backpack that ships with a prominent American Caesium magnetometer. To design this backpack I had to study and understand the Caesium magnetometer specifications. I have used this magnetometer many times in the past (my university owned one), but still wanted to check the latest […]

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Airborne magnetic surveys using unmanned aerial vehicles (UAV) and lightweight potassium magnetometers.

Airborne magnetic surveys using unmanned airborne vehicles need geophysical equipment that is lightweight. GEM Systems now sells an option for a lightweight electronics box case for the GSMP-35 “k-mag”. Optically pumped magnetometers have lightweight sensors, but the electronics boxes can be heavy due to the case material and thickness. Any internal frame that binds two […]

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Put your feet first when conducting ground mag surveys

Ground mag surveys involve walking tens of kilometers day after day. In my mid twenties I could average close to 30 l-km per day for days at a time in favorable terrain. Walking the line was tolerable when my feet where in good nick, but insufferable when I had blisters on my feet. Nowadays there […]

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Are Overhauser magnetometers right for you?

GSM-19 Overhauser magnetometers are the choice of the ground magnetic survey industry. They are the lightest and simplest to use of any magnetometer on the market. With in-built navigation there is no need to carry a handheld GPS. Handheld GPS units can reduce the data quality because they are magnetic. They also add additional and […]

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Don’t do a ground magnetic survey without GPS navigation built into the magnetometer.

Most magnetometers can tell you where they have been, but only a few can tell you where to go. For efficiency, ground magnetic surveys are usually conducted along parallel survey lines – or grids. In the bad old days prior to GPS, these grids would have to be laid out at great expense prior to […]

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How to walk straighter and further with less effort when conducting ground geophysical surveys.

Some walk the line straighter than others. Walking straighter lines when conducting ground geophysical surveys increases the production l-km in a day. Alternatively, if there is a fixed amount of work to do in the day, then straighter lines means less walking and less stress on the body. Walking straight in thick vegetation is never […]

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