Contribution of GRAV-D airborne gravity to improvement of regional gravimetric geoid modelling in Colorado, USA

Abstract This paper studies the contribution of airborne gravity data to improvement gravimetric geoid modelling across mountainous area in Colorado, USA. First, was processed, filtered, and downward-continued. Then, three anomaly grids were prepared; first grid only from terrestrial data, second downward-continued third combined data. Gravimetric models with determined using least-squares modification Stokes’ formula additive corrections (LSMSA) method. The absolute relative accuracy computed estimated on GNSS/levelling points. Results exhibit improved by 1.1 cm or 20% terms standard deviation when used for computation, compared model Finally, spectral analysis surface performed, which provided insights into specific wavelength bands contributed power spectrum.