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Regional Models

India (IndGG-SH2021)


  Authors: R. Goyal, et al.     Created: 2021    Resp: R. Goyal  
      Status: PUBLIC    
Description:
The IndGG-SH2021 is the Indian Gravimetric Geoid model developed using the Stokes-Helmert method. Data used are terrestrial gravity anomalies from GETECH, satellite-altimeter derived marine gravity anomalies, MERIT digital elevation model, EGM2008 and GO_CONS_GCF_2_DIR_R5 global geopotential models. The Vaníček and Kleusberg modified Stokes kernel was used in the calculations with various combinations of modification degree and integration radius. This gravimetric geoid model is for the modification degree of 300 and an integration radius of 1°. The IndGG-SH2021 extends from 7° N to 37° N latitude and 68° E to 98° E longitude with a grid spacing of 0.02°×0.02°. On validation with the available GNSS/levelling data, mean±STD (in m) for India is -0.33±0.49. 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 -0.73±0.21, -0.84±0.09, -0.00±0.16, and 0.72±0.03, respectively.

Reference:
R. Goyal (2022). Towards a gravimetric geoid model for the mainland India. PhD Thesis. Indian Institute of Technology Kanpur, India and Curtin University, Australia.

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