# US 9,753,167 B2 · Calibrating rotation data and translational data > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,753,167 B2 - Document ID: US9753167B2 - Status: Granted - Kind: B2 - Application number: 13/556,034 - Filed: 2012-07-23 - Published: 2014-01-23 - Granted: 2017-09-05 - Earliest claimed: 2012-07-23 - Assignees: WesternGeco L.L.C. - Applicants: Pascal Edme; Everhard Johan Muyzert - Inventors: Pascal Edme; Everhard Johan Muyzert - Web page: https://patentgrep.com/patent/US9753167B2 ## CPC - G01V 1/36: Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy - G01V 13/00: Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups G01V1/00 – G01V11/00 - G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02) ## Abstract Rotation data and translational data are received. A calibration operator is determined based on the rotation data and translational data, where the calibration operator is useable to relatively calibrate the rotation data and the translation of data. ## Claims ### Claim 1 A method comprising: placing a plurality of seismic sensors proximate to the earth surface, each of the seismic sensors having a first translational motion sensor, a first rotation sensor and a second rotation sensor; receiving ground-roll rotation data based on measurement by the rotation sensors; receiving translational data from the translational seismic sensors; and determining a calibration operator based on the ground-roll rotation data and translational data, wherein the calibration operator is useable to relatively calibrate the ground-roll rotation data and the translational data. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the calibration operator is based on a ratio between a spatial derivative of the translational data and a time derivative of the ground-roll rotation data. ### Claim 3 (depends on 1) The method of claim 1, further comprising: determining a slowness of a wavefield that is being surveyed using the seismic sensor, wherein determining the calibration operator is further based on the slowness. ### Claim 4 (depends on 3) The method of claim 3, wherein determining the calibration operator is based on a ratio between the ground-roll rotation data and a product of the slowness and the translational data. ### Claim 5 (depends on 4) The method of claim 4, further comprising determining the slowness for a given location of a sensor assembly. ### Claim 6 (depends on 4) The method of claim 4, further comprising determining the product of the slowness and the translational data based on applying a tau-p transform of the translational data. ### Claim 7 (depends on 1) The method of claim 1, wherein the ground-roll rotation data is received from the rotational sensors. ### Claim 8 (depends on 7) The method of claim 7, wherein the calibration operator is dependent on a characteristic of a sensor assembly including the rotational sensors and the seismic sensor. ### Claim 9 (depends on 8) The method of claim 8, wherein the calibration operator is further dependent on a coupling of the sensor assembly with a ground surface. ### Claim 10 (depends on 1) The method of claim 1, wherein determining the calibration operator is based on the translational data acquired by the seismic sensor in response to a single shot. ### Claim 11 (depends on 1) The method of claim 1, wherein determining the calibration operator comprises determining a transfer function between the at least one sensor and the seismic sensor. ### Claim 12 (depends on 1) The method of claim 1, wherein the calibration operator is a scalar coefficient or a frequency dependent operator and is determined for at least one frequency. ### Claim 13 A system comprising: at least one storage medium to store ground-roll rotation data and translational data acquired based on measurement from a plurality of seismic sensors, each seismic sensor having a translational movement sensor, a first rotation sensors and a second rotation sensor; and at least one processor to: determine a calibration operator based on the ground-roll rotation data and translational data, wherein the calibration operator is useable to relatively calibrate the ground-roll rotation data and the translational data. ### Claim 14 (depends on 13) The system of claim 13, wherein determination of the calibration operator is based on use of the translational data acquired in response to a single shot. ### Claim 15 (depends on 13) The system of claim 13, wherein determination of the calibration operator is based on use of the translational data acquired in response to plural shots. ### Claim 16 (depends on 13) The system of claim 13, wherein the calibration operator is for a first axis, and wherein the at least one processor is to use the calibration operator for the first axis as a calibration operator for a second, different axis. ### Claim 17 (depends on 13) The system of claim 13, wherein determination of the calibration operator is based on a ratio of a time derivative of the rotation data and a spatial derivative of the translational data. ### Claim 18 (depends on 13) The system of claim 13, wherein the at least one processor is to further determine a slowness of an event measured by the seismic sensor, and wherein determination of the calibration operator is further based on the slowness. ### Claim 19 An article comprising at least one non-transitory machine-readable storage medium storing instructions that upon execution cause a system to: receive ground-roll rotation data based on measurement by a plurality of seismic sensors, each seismic sensor having a translational sensor, a first rotation sensor and a second rotation sensor; receive translational data from the plurality of seismic sensors; and determine a calibration operator based on the ground-roll rotation data and translational data, wherein the calibration operator is useable to relatively calibrate the ground-roll rotation data and the translational data. ### Claim 20 (depends on 19) The article of claim 19, wherein the ground-roll rotation data is received from a rotational sensor.