GDS uses a Canadian Micro Gravity (CMG) GT-2A gravimeter for the acquisition of gravimetric data. This gravimeter is of Scalar type. It measures the total field and is fully equipped with gyroscopic stabilization platform and data acquisition system. The GT-2A is hermetically sealed offering greater protection when operating in extreme environmental conditions.
The very large dynamic range provides high precision data even in turbulent flying conditions. Data is acquired through short periods of saturation in extreme turbulence by the automatic application of a reduced order Kalman filter, enabling platform misalignment to be computed and hence controlled. The automatic calibration program computes accelerometer scale factors and errors in perpendicularity between the accelerometer sensitive axis and the platform surface.