التفاصيل البيبلوغرافية
| العنوان: |
Evaluation of EGM96 and EGM08 based on GPS/Levelling Heights in Egypt. |
| المؤلفون: |
Aziz, Khaled Mahmoud Abdel, Rashwan, Karim Samir, Saba, Nasr |
| المصدر: |
South African Journal of Geomatics; Feb2023, Vol. 12 Issue 1, p44-55, 12p |
| مصطلحات موضوعية: |
GLOBAL Positioning System, GEOPOTENTIAL height, CELESTIAL mechanics, STANDARD deviations, GEOID |
| مستخلص: |
The heights determined by Global Positioning System (GPS) refer to the ellipsoid called the World Geodetic System 1984 (WGS84). Global Geopotential Models (GGMs) that are available on GNSS commercial software are generally used to transform ellipsoidal heights to orthometric heights. In this study, the geoid heights of GPS/Levelling were computed to evaluate the accuracy of the geoid heights obtained from two GGMs, namely, the Earth Gravitational Model 96 (EGM96) and the Earth Gravitational Model 08 (EGM08). Seventeen (17) GPS/Levelling stations of the High Accuracy Reference Network (HARN) over Egypt were used for this purpose. The standard deviations for the differences between the geoid heights obtained through GPS/Levelling and those obtained from EGM96 and EGM08 were determined as ± 1.212 m and ± 0.543 m, respectively. This research confirms that the geoid heights obtained from EGM08 are closer to the geoid heights determined using GPS/Levelling over Egypt. [ABSTRACT FROM AUTHOR] |
|
Copyright of South African Journal of Geomatics is the property of CONSAS Conference and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
