Field notes
UAV magnetometers need to be light. The GEM Systems GSMP35U “DroneMag” magnetomer weighs in at less than 1kg. It is based on the proven and reliable GSMP35 ground based magnetometer GEM pioneered over 10 years ago...
We have for sale a used GEM Systems GSMP35 potassium magnetometer with GPS and navigation.
These are the best magnetometers money can...
Ideal for UAV or ground magnetic base station.
Ideal for ground magnetic survey roving (walking) magnetometer.
We have for a sale a modern GEM...
We have a lot of magnetometer spare parts for sale.
Modern Mag has developed our own backpack to hold magnetometers from GEM Systems, Geometrics and Scintrex. As a consequence, we have a LOT of used spare parts for GEM Systems backpacks and magnetometers...
Modern Mag has developed a carbon fibre and aluminium backpack for use with GEM systems, Scintrex or a Geometrics magnetometer.
This pack is lighter and much more comfortable...
Ideal for UAV or ground magnetic base station. Recently serviced by GEM.
We have for sale a used GEM Systems GSM-19 Overhauser gradiometer. It would be ideal for a base station used in tandem with a UAV magnetometer...
Scintrex and Geometrics magnetometers require heavy sealed lead acid magnetometer batteries greater than 7.2Ah in size. In contrast GEM Systems uses lightweight lithium Ion batteries and SLA batteries only 2.2Ah in size.
...Modern Mag now offers UAV magnetic surveys, otherwise known as drone mag surveys.
Ground magnetic surveys result in the best quality magnetic data possible. We can survey your tenement on the ground using our fleet of state of the art potassium magnetometers...
For a limited time you can save thousands off the new price of a GEM Systems GSM-19 overhauser base station or rover magnetometer. Fast sampling rover (GSM-19W overhauser) magnetometers are currently CAD$11,850 and base station GSM-19 overhausers are...
“let’s strap a magnetometer onto our UAV. Easy. We’ll make millions. Millions I tells ya doing UAV airborne magnetic surveys!!”
Get in line people. I have fielded one call/email per week for about...
Coal magnetic surveys are usually done at an ultra-high resolution...
Modern Mag now has marine magnetic survey capabilities. The Royal Melbourne Yacht Squadron (RMYS) recently developed a new marina. While the sea floor had been dragged with a chain to collect items...
Modern Mag requires VLF equipment for a short hire in Australia or Sri Lanka. The crew will mobilise from Australia, but the survey is in Sri Lanka. GEM systems equipment is preferred, but not essential. We also have experience with ABEM VLF equipment...
An independent geophysicist recently compared datasets from Modern Mag and the supposed ground magnetic industry leader over the same coal tenement.
The results “were a caning” in the words of our most senior operator. The independent consultant...
Modern Mag now has a crew with standard 11 mining course induction certificates. This complements our current Job Safety Analysis (JSA) and Toolbox safety practices we apply to ground magnetic surveys. Our crews have current first aid certificates...
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...
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...
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...
The GEM Systems GSMP-35 potassium magnetometer is...
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...
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...
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...
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...
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...
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...
Did you know Modern Mag sells GEM systems magnetometers and spares? We have been using GEM equipment for over 17 years. We have experience with all of their magnetometers and can help you choose a system for your needs. We chose GEM magnetometers for...
Modern Mag in conjunction with GEM systems magnetometers is trialing new firmware for the GEM-19 and GSMP-35 series of magnetometers. For many years there has been a fatal flaw in the real time magnetometer navigation function. A programming error...
While any kind of magnetometer can be used as a base station magnetometer to record temporal variations in the geomagnetic field, some are more accurate and convenient than others. It is convenient to use a base station from the same manufacturer since...
Normally the only data correction applied to ground magnetic data is a diurnal (a.k.a base station) correction. This type of correction simply subtracts the static base station reading from the moving rover magnetometer reading of the same time.
As a young geophysicist I paid my dues and walked the ground magnetic survey line kilometers. It is a right of passage that teaches graduate geophysicists design, acquisition and processing skills for the most common potential field dataset. Magnetics...
