Profile: ION Geophysical Corp. specializes in process measuring equipment. Our product line includes sensors, marine navigation equipment, recording systems, and geo phones. Our VectorSeis® is a digital, 3C, single-point sensor that contains three identical, highly sensitive MEMS (micro-electro-mechanical systems) accelerometer chips. The single-point VectorSeis® sensors do not suffer the directional bias, signal smear & frequency loss effects of a geophone array, and therefore more accurately sample the true seismic wavefield with a broader bandwidth.