Abstract
The accuracy of the SRTM2gravity high-resolution topographic gravity model is tested in this study. Complete Bouguer anomaly datasets calculated with classical formula in planar approximation and using the SRTM2gravity model in spherical approximation were compared in the study area. Two geoid models computed using free-air anomalies, which were restored from each Bouguer anomaly datasets, were compared to each other and they were validated at GPS/leveling points. In the mountainous part of the area, two geoid models differ by up to 4 cm. Following GPS/leveling validations, the geoid models provided nearly the same accuracy (∼4.2 cm). In conclusion, the accuracy of the SRTM2gravity model data was found sufficient to use in gravity reduction and it is recommended as a ready-to-use product in the area for gravity interpolation/gridding and geoid determination purposes.
| Original language | English |
|---|---|
| Pages (from-to) | 546-556 |
| Number of pages | 11 |
| Journal | Survey Review |
| Volume | 55 |
| Issue number | 393 |
| DOIs | |
| Publication status | Published - 2023 |
Bibliographical note
Publisher Copyright:© 2023 Survey Review Ltd.
Funding
The ITU General Research Project Department provided funding for the study under protocol number MGA-2018-41585. The SRTM2gravity high-resolution global model data was provided by Hirt et al. (), and the GPS/leveling data was provided by the ITU Geodesy Division. Using funding from the ITU General Research Project with the reference number MGA-2018-41592, gravity anomalies with a resolution of 30″ were acquired from the General Directorate of Mineral Research and Exploration. To compute gravity data interpolation and terrain correction, the GRAVSOFT software package was used. Geoid computations using the LSMSA method were performed using ITU-GRG software. The figures in this article were created using the Generic Mapping Tools (GMT) software. The editor’s and reviewers’ contributions to the article’s review process are greatly appreciated. This study was carried out within the scope of the general research project with number MGA-2018-41585 supported by Istanbul Technical University Scientific Research Projects Department (ITU-BAP). The ITU General Research Project Department provided funding for the study under protocol number MGA-2018-41585. The SRTM2gravity high-resolution global model data was provided by Hirt et al. (2019), and the GPS/leveling data was provided by the ITU Geodesy Division. Using funding from the ITU General Research Project with the reference number MGA-2018-41592, gravity anomalies with a resolution of 30″ were acquired from the General Directorate of Mineral Research and Exploration. To compute gravity data interpolation and terrain correction, the GRAVSOFT software package was used. Geoid computations using the LSMSA method were performed using ITU-GRG software. The figures in this article were created using the Generic Mapping Tools (GMT) software. The editor’s and reviewers’ contributions to the article’s review process are greatly appreciated.
| Funders | Funder number |
|---|---|
| ITU General Research Project | MGA-2018-41592 |
| ITU General Research Project Department | |
| ITU Geodesy Division | |
| Istanbul Technical University Scientific Research Projects Department | |
| Bilimsel Araştırma Projeleri Birimi, İstanbul Teknik Üniversitesi |
Keywords
- Geoid model calculation
- Global topographic gravity models
- Gravity reduction
- LSMSA method
- SRTM2gravity model
- Topographic correction