A method and apparatus of discrimination detection using multipl

Active geophysical prospecting system

Active impulse magnetometer with bipolar magnetic impulse genera

Active magnetic anomaly sensing array and processing system

Active magnetic anomaly sensing system having synchronized...

Adaptive multichannel locator system for multiple proximity...

Adaptive multichannel locator system for multiple proximity...

Advances in high frequency dielectric logging

Airborne electromagnetic time domain system

Airborne electromagnetic time domain system, computer...

Airborne geophysical surveying system using multiple coil pairs

Airborne remote sensing electric field exploration system

Aircraft equipped for airborne vector magnetic exploration...

Alternating current induction method using an annular magnetic c

Amorphous metal tagging system for underground structures includ

Amplitude and phase measurement in electromagnetic logging

Amplitude modulated resistivity logging system

An above-ground arrangement for and method of locating a discret

Analog front-end coherent in-phase demodulation data...

Antenna assembly for microwave reflection survey equipment