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Airborne Systems for Geophysical survey

DEVTEC is a consulting engineering company specializing in the design, building and integrating of airborne geophysical systems, both for helicopters and fixed-wing aircraft.

A full system can include:

1. A Base Station that will collect calibration data of sunspots or other activity that may affect the earth’s magnetic field. There may be more than one of these systems in the field to assist in calibration background variations across the area of interest. These have not been used in the past, but are now being called upon more frequently. It is believed that this is because background noise due to sunspots has been found to be more frequent and sudden in occurrence. When severe noise occurs, airborne data is useless, thus it is better to not expend valuable fuel and airtime. A method to remove the less severe noise means that data can be collected sooner, rather than grounding aircraft and crews to wait for better conditions.
2. An Airborne system is required to collect the desired data in the area of interest. This consists of several subsystems as detailed later.
3. . A central ground station is used as the field headquarters for operations. This typically contains a standard PC, but it may be augmented by a transmitter/receiver to the Base Stations

In operation, the airborne system collects all the magnetic and gravimetric data of the earth’s surface as the aircraft flies across it. A GPS receiver is used to record the exact position and time of the data collected. The base stations collect this basic data as well which can then be used to remove any global changes to the data stream due to external factors not related to the instantaneous change in the earth’s crust. The Airborne systems may also collect video data of the terrain so that post analysis may be enhanced.

For more information see Developing Technology Inc.

Depth Position Recorder

Specs on the new ISA DC:DC power supply and signal conditioner for magnetometers.

Serial Device Simulator

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