Deployment of Differential Global Positioning System in Regional Gravity Surveys

This note presents the deployment of differential global positioning system in regional gravity surveys. The high-precision three-dimensional (latitude, longitude and elevation) real-time global satellite navigation system data play a key role in the processing of gravity data in the form of 'elevation correction'. A suitable method has been developed to maintain accuracy in the elevation data and subsequently the gravity observations. The data acquired during this survey are used to map the obvious geological province areas in the northwestern part of India and for the preparation of Bouguer gravity contour map of India with 1 mGal interval under National Geophysical Mapping of the Geological Survey of India in a phased manner.