Importance

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Abstract

A seismic data acquisition apparatus includes a receiving antenna for receiving synchronization information representative of a remote reference clock signal; a local clock circuit delivering a local clock signal (CLK); a gauging circuit adapted to measure a frequency drift and a phase error of the local clock signal (CLK) in view of the synchronization information; an analog-to-digital converter adapted to provide a series of digital sampled and dated seismic data according to the local clock signal (CLK) and representative of the received seismic signal; and a correcting circuit configured to provide corrected series of digital sampled and dated seismic data based at least on the measured frequency drift and phase error.

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First Claim