Airborne Geophysical Solutions

Typical applications of airborne magnetics include mineral exploration; hydrocarbon exploration; engineering and environmental surveys; and UXO detection. GEM Systems' instrumentation includes both airborne base station magnetometers, and very high sensitivity / sampling potassium sensors and gradiometers.

Overhauser - Airborne Base Station Applications

GEM's Overhauser magnetometers are employed routinely in many airborne groups, including Fugro Airborne Surveys.
QuickTracker provides a number of advantages as a base station - a key one is the ability to program the base station in one of three modes:

• Daily scheduling (define working hours and minutes each day). This mode provides economy of battery usage and memory on a daily basis.

• Flexible scheduling (set up to 30 on / off periods). Simply define a series of periods and the base station will activate itself according to your survey specifications. This mode provides the greatest flexibility for longer surveys where operators who may be in the field for a month or more, and who do not want to schedule their base station daily or leave it running continuously.

• Immediate start. This mode is the traditional mode of starting a base station unit and leaving it until the field operator returns to physically turn off the unit.

Base stations can be programmed remotely via Personal Computer - providing an additional time-savings in data entry and system setup. To download a brochure, click here.

Deployment Options

Gem's systems can be deployed in a variety of configurations in both fixed-wing craft and helicopters. Sensors can be installed as a total field device or in combination with multiple sensors for vertical, transverse or longitudinal gradient measurements. Gem's trained personnel are also available to consult on installation alternatives.

SuperSenser - New Technology Takes Flight

Gem's GSMP-30A represents a key advance in airborne surveying - providing the highest sensitivity available in commercial sensors. This potassium-based system also offers key advantages over conventional cesium systems, including minimization of heading errors - a naturally occurring phenomena with cesium.

In addition, the SuperSenser does not require regular re-alignments and new lamps can be replaced in the field without returning units to the manufacturer. Maintenance costs are estimated to be 10 times lower than existing cesium alternatives. To download a brochure, click here.

SuperGrad - The Evolution of Gradiometry

Gradiometry is at the core of many airborne applications, such as diamond exploration, where gradients help locate and pinpoint anomalies between survey lines. For this kind of application, GEM offers SuperGrad - the highest sensitivity total field magnetic device ever developed.

The GSMP-20GS is an order-of-magnitude more sensitive than other gradiometers, producing a 0.0001 nT p-p sensitivity at a sampling rate of 20 Hz, averaged over a 1 second interval. It also delivers the benefits of a potassium-based device, including high absolute accuracy, almost no orientation errors and minimal maintenance (i.e. no calibration or alignment). For a brochure, click here.