GEOPOTENTIAL MODELS AS A TOOL OF DENSIFYING GRAVITY FOR ORTHOMETRIC CORRECTION COMPUTATION | ||
| ERJ. Engineering Research Journal | ||
| Article 11, Volume 36, Issue 4, October 2013, Pages 475-479 PDF (771.52 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/erjm.2013.67098 | ||
| Author | ||
| Raaed Mohamed Kamel Hassouna | ||
| Department of Civil Engineering, Faculty of Engineering in Shebin El-Kom, Minoufiya University, Shebin El-Kom, Egypt | ||
| Abstract | ||
| In the current study, the global geopotential harmonic models are used to densify gravity values along precise leveling routes, and hence to minimize the discretization error in computing the orthometric correction and to represent an economical alternative. Furthermore, these models are checked regarding their capability of being the only source of gravity information along spirit leveling lines. The orthometric corrections, computed for two simulated test links, are compared with those resulting from using purely observed gravity. Based on the obtained results, it is recommended to use the geopotential harmonic models as an economical source of gravity information along precise levelling routes. Moreover, it is recommended to investigate the application of the remove-restore technique of geopotential models in the computation of orthometric correction. | ||
| Keywords | ||
| Orthometric correction; Geopotential models – Spirit leveling | ||
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