| US 7,526,386 B2 | ||
| Seismic measuring system including GPS receivers | ||
| Patrick C. Fenton, Calgary (Canada) | ||
| Assigned to NovAtel Inc., Calgary, Alberta (Canada) | ||
| Filed on Aug. 10, 2006, as Appl. No. 11/502,086. | ||
| Application 11/502086 is a continuation of application No. 10/891800, filed on Jul. 15, 2004, granted, now 7,117,094. | ||
| Claims priority of provisional application 60/488124, filed on Jul. 17, 2003. | ||
| Prior Publication US 2006/0271331 A1, Nov. 30, 2006 | ||
| Int. Cl. G01V 1/00 (2006.01); G01S 1/00 (2006.01) | ||
| U.S. Cl. 702—14 [342/357.12] | 18 Claims |
| 1. A deformation monitoring system including:
one or more base receivers for receiving global navigation satellite system signals that are used to determine global position
and having associated antennas with substantial views of the sky, the one or more base receivers acquiring and tracking the
satellite signals and providing range information;
a plurality of slave receivers for receiving the global navigation satellite system signals, the slave receivers being selectively
located over the site being monitored, the slave receivers acquiring and tracking the satellite signals and providing range
information; and
a data recording and control center for
collecting the range information over an extended period of time and batch processing the information to determine which respective
range data are valid and calculate the positions of the respective slave receivers using the valid range data, and
analyzing the calculated positions to determine movement that indicates deformation.
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