Systems and Methods for Seismic Data Acquisition Employing Clock Source Selection in Seismic Nodes
First Claim
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1. A seismic data acquisition system comprising:
- one or more seismic sources;
a sensor system for acquiring and/or monitoring analog seismic sensor data, the sensor system comprising a plurality of sensor modules, each module comprising a comparing unit comprising software;
wherein the software in each module tests clock quality by running a sigma-delta modulator from two different clock sources and compares a noise-floor of the modulator when using the different clocks.
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Abstract
Systems and methods for acquiring seismic data are described, one system comprising one or more seismic sources, a plurality of sensor modules each comprising a seismic sensor configured to sample analog seismic data, each module comprising a comparing unit comprising software; wherein the software in each module tests clock quality by running a sigma-delta modulator from two different clock sources in the node and compares a noise-floor of the modulator when using the different clocks.
31 Citations
20 Claims
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1. A seismic data acquisition system comprising:
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one or more seismic sources; a sensor system for acquiring and/or monitoring analog seismic sensor data, the sensor system comprising a plurality of sensor modules, each module comprising a comparing unit comprising software; wherein the software in each module tests clock quality by running a sigma-delta modulator from two different clock sources and compares a noise-floor of the modulator when using the different clocks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A seismic data acquisition system comprising:
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one or more seismic sources; a sensor system for acquiring and/or monitoring analog seismic sensor data, the sensor system comprising a plurality of sensor modules, each module comprising a comparing unit comprising software; wherein the software in each module tests clock quality by running a sigma-delta modulator from two different clock sources and compares a noise-floor of the modulator when using the different clocks wherein the two different clock sources comprises a distributed slave clock and a master clock. - View Dependent Claims (15, 16, 17)
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18. A method comprising:
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a) initiating one or more seismic sources; b) acquiring reflected analog seismic data using a sensor system, the sensor system comprising a plurality of sensor modules each comprising a comparing unit comprising software; c) testing clock quality using the software in each module by running a sigma-delta modulator from two different clock sources in each module; d) comparing a noise-floor of the modulator when using the different clocks; and e) selecting the clock that provides the best noise floor, or the clock that provides the noise floor below a specified value. - View Dependent Claims (19, 20)
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Specification