P-THEM is a versatile state-of-the-art time-domain helicopter-borne electromagnetic system. It features a powerful transmitter, an upgraded state of the art PC-based receiver and an advanced digital signal processing software package. It is adaptable, well suited for shallow soil mapping, ground water and/or ore-body exploration.
P-THEM comprises an 8.5 metres diameter (57 m2) transmitter loop assembly and a 3-axis receiver suspended on the tow-cable midway between the transmitter assembly and the helicopter. Power for the P-THEM system is provided by a motor generator mounted on the transmitter assembly.
P-THEM transmits a half sine wave 4ms pulse with a 400+ KNIA peak moment. It is easily transportable and rapidly deployed; typically in half-a-day.
The survey system also includes a high-sensitivity cesium magnetometer, a real-time OmniSTAR/DGPS differential navigation system, radar and barometric altimeters and an optional gammaray spectrometer with 16.8 litres of sensor.
|P-THEM profile data acquired over the Buckingham test line.|