AN IMPROVED GEOIDAL MODEL FOR EGYPT
MILLER, K., ZEIDAN, S., HEIKAL, A. (2009). AN IMPROVED GEOIDAL MODEL FOR EGYPT. EKB Journal Management System, 7(1), 1-9. doi: 10.21608/jegs.2009.380871
K. MILLER; S. ZEIDAN; A. HEIKAL. "AN IMPROVED GEOIDAL MODEL FOR EGYPT". EKB Journal Management System, 7, 1, 2009, 1-9. doi: 10.21608/jegs.2009.380871
MILLER, K., ZEIDAN, S., HEIKAL, A. (2009). 'AN IMPROVED GEOIDAL MODEL FOR EGYPT', EKB Journal Management System, 7(1), pp. 1-9. doi: 10.21608/jegs.2009.380871
MILLER, K., ZEIDAN, S., HEIKAL, A. AN IMPROVED GEOIDAL MODEL FOR EGYPT. EKB Journal Management System, 2009; 7(1): 1-9. doi: 10.21608/jegs.2009.380871

AN IMPROVED GEOIDAL MODEL FOR EGYPT

Journal of Egyptian Geophysical Society
Volume 7, Issue 1, 2009, Page 1-9  XML PDF (572.73 K)
Document Type: Original Article
DOI: 10.21608/jegs.2009.380871
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Authors
K. MILLER; S. ZEIDAN; A. HEIKAL
The British University in Egypt, El Sherouk City, Cairo-Suez Desert Road, Egypt
Abstract
Use of Global Navigation Satellite Systems (GNSS) are of considerable national benefit to projects such as that of land registration, which has been ongoing in Egypt for a number of years. Its particular advantage lies in delineation of title in the agricultural sector where land provides the primary means of sustenance to the community. However, much of the agricultural lands depend on irrigation, and the application of heights within the engineering design for such schemes require the use of a geoidal model to convert heights obtained from GNSS to orthometric levels. Geoidal models for Egypt have progressed as gravity and satellite data have been acquired with the latest model at national level being derived from a combination of the Earth Gravity Model of 1996 (EGM96) together with gravity data. The suggested RMS accuracy is 0.49 m, which is acknowledged as being insufficient for more detailed applications across large low lying agricultural regions. Improvement through a 408 km stretch of the Nile delta has been obtained through levelling and GPS observations to obtain a surface that is suggested as being accurate to better than 0.04 m. This is in use for hydrographic work within the delta. More recent developments from the Gravity Recovery and Climate (GRACE) experiment have provided higher resolution models of the earth gravity field, for example GGM02, and the data is now being used to develop an Earth Gravity Model of 2008 (EGM2008). This research compares the output from the recent developments in the field with previous work undertaken in providing geoidal models for Egypt..
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