A practical software package for computing gravimetric geoid by the least squares modification of Hotine's formula


Abbak R. A., Ellmann A., ÜSTÜN A.

EARTH SCIENCE INFORMATICS, vol.15, no.1, pp.713-724, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 1
  • Publication Date: 2022
  • Doi Number: 10.1007/s12145-021-00713-3
  • Journal Name: EARTH SCIENCE INFORMATICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, CAB Abstracts, Geobase, INSPEC
  • Page Numbers: pp.713-724
  • Keywords: Auvergne test-bed, Hotine's integral, LSMHSOFT, Rugged topography, Point-wise integration, GRAVITY, COMPUTATION, AREA
  • Kocaeli University Affiliated: Yes

Abstract

Today's geodetic community starts to model an accurate gravimetric geoid within a 5 mm level, which entirely meets the demands of all technical and geoscientific studies. In this context, a wide range of geoid modelling methods have been published through the years, each of them has its own philosophy. Recently, a new geoid modelling technique has been developed by using the least squares modification of Hotine's formula (LSMH), which gives more reasonable results than other methods. However, a practical and compact software package is not publicly accessible for researchers in this method. Thus, a scientific software package named "LSMHSOFT" is developed by C programming language and made available for public use in this study. Subsequently, the software is employed for the composition of gravimetric geoid in the Auvergne test-bed, verifying it by GNSS (Global Navigation Satellite Systems)-levelling data. Numerical results indicate that LSMHSOFT is a powerful tool for modelling gravimetric geoid by the least squares modification of Hotine's formula and its additive corrections.