10.5880/isg.2021.008 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2022-08-23 urn:ogc:def:crs:EPSG:4326 The Indian gravimetric geoid model based on the Curtin University approach with Featherstone-Evans-Olliver modification of the Stokes kernel: IndGG-CUT2021 2022-08-23 revision 2021 creation doi:10.5880/isg.2021.008 Goyal, Ropesh Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India author Featherstone, Will E. School of Earth and Planetary Sciences, Curtin University of Technology, Perth, Australia author Claessens, Sten J. School of Earth and Planetary Sciences, Curtin University of Technology, Perth, Australia author Dikshit, Onkar Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India author Balasubramanian, Nagarajan Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India author GFZ Data Services publisher The IndGG-CUT2021 is the Indian Gravimetric Geoid model developed using the Curtin University of Technology (CUT) approach, namely Moritz’s analytical solution to Molodensky’s problem, where Molodensky’s G₁ term is approximated by terrain correction. The method primarily calculates the quasigeoid model, which was converted to the geoid model by applying the geoid-quasigeoid separation term calculated using the method by Flury and Rummel (2009). Data used are terrestrial gravity anomalies from GETECH, satellite-altimeter derived marine gravity anomalies, MERIT digital elevation model, EIGEN6C4 and EGM2008 global geopotential models. The Featherstone-Evans-Olliver modified Stokes kernel was used in the calculations with various combinations of modification degree and integration radius. This gravimetric geoid model was obtained with the modification degree of 300 and an integration radius of 1°. The IndGG-CUT2021 model extends from 7° N to 37° N latitude and 68° E to 98° E longitude with a grid spacing of 0.02°×0.02° and it is referred to the GRS80 ellipsoid. On validation with the available GNSS/levelling data, mean±STD (in m) for India is -0.15±0.41. However, on cluster-wise validation in the four regions of the country, Uttar Pradesh West, Uttar Pradesh East, Hyderabad, and Bangalore, mean±STD (in m) are -0.57±0.12, -0.48±0.09, 0.11±0.16, and 0.77±0.03, respectively. The geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage. Goyal, Ropesh Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India rupeshg@iitk.ac.in pointOfContact ISG Staff International Service for the Geoid (ISG) isg@polimi.it http://www.isgeoid.polimi.it/ informtion pointOfContact Geodesy Geoid model ISG Curtin University approach Featherstone-Evans-Olliver Stokes kernel modification India EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY NASA/GCMD Earth Science Keywords publication CC BY 4.0 CC BY 4.0 10.3319/TAO.2021.08.10.02 DOI IsDocumentedBy 10.1007/s00190-009-0302-9 DOI References 10.5194/essd-13-1653-2021 DOI References http://www.isgeoid.polimi.it/ URL References 10.5880/isg.2021.009 DOI IsVariantFormOf 10.5880/isg.2021.010 DOI IsVariantFormOf eng geoscientificInformation Gravimetric geoid model IndGG-CUT2021 - PLEASE NOTE: The basemap does not represent the actual political boundary of India 68 98 7 37 http://doi.org/10.5880/isg.2021.008 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information