Monitoring the performance of relative gravimeters for quality control in Mexico's gravity data
Abstract
Gravimetric surveying is the fundamental data source for geodetic and geophysical processes like gravity field modeling, geoid modeling and prospection among others. These applications require and often assume that the accuracy of all field data is homogeneous to the uncertainty level of a few microGal. Nonetheless, after taking care of the methodology, the data obtained can be systematically contaminated with errors at the level of hundreds of microGal due to sudden devise miss-calibration. At the Mexico's National Institute of Statistics and Geography, the program of gravimetric surveying targets to obtain a 100% of national coverage for geoid modeling while recent procedures are implemented to monitor the performance of measuring devices. By regularly testing the ability of relative gravimeters to obtain accurate results it has been proven that the data quality can be maintained at a regular level for the convenience of users. Activities like the re-calculation of scale factors, drift and tide corrections ensure not only the present and future databases but even allow improvement of past records.
- Publication:
-
AGU Spring Meeting Abstracts
- Pub Date:
- May 2013
- Bibcode:
- 2013AGUSM.G33C..04A
- Keywords:
-
- 1204 GEODESY AND GRAVITY / Control surveys