Comparison of Different Approaches for Combining Gravity Field Wavelengths for Egypt
Within the context of the remove-restore technique, this research seeks to determine the best combination of gravity field wavelengths for Egypt’s geoid computation. There are various methods for such a wavelength combination. It has been proposed to merge the regional data signals and the global ge...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | Arabic |
| Published: |
Assiut University, Faculty of Engineering
2024-01-01
|
| Series: | JES: Journal of Engineering Sciences |
| Subjects: | |
| Online Access: | https://jesaun.journals.ekb.eg/article_331889_c01d2096779e35c65f376c86ce13153e.pdf |
| _version_ | 1827391723690524672 |
|---|---|
| author | Hussein Abd-Elmotaal Mostafa Ashry Atef Makhloof |
| author_facet | Hussein Abd-Elmotaal Mostafa Ashry Atef Makhloof |
| author_sort | Hussein Abd-Elmotaal |
| collection | DOAJ |
| description | Within the context of the remove-restore technique, this research seeks to determine the best combination of gravity field wavelengths for Egypt’s geoid computation. There are various methods for such a wavelength combination. It has been proposed to merge the regional data signals and the global geopotential earth models, potentially using a modified Stokes’ kernel with various methods. Firstly, from our computations, it can be concluded that the conventional remove-restore technique should not be applied for the determination of gravity anomalies and geoid determination. Also, the outcomes demonstrated that the estimated gravity anomalies utilizing the window approach are independent, the finest, and unbiased and have a minimal difference between the maximum and minimum values. The geoid produced from the GPS levelling has fewer differences between it and the geoids computed using the modified Stokes’ kernels as well as the geoid determined using the window technique than in the case of utilizing the unmodified Stokes’ classical kernel. Finally, the window approach gives, however, completely better outcomes compared to the Stokes unmodified kernel method. |
| first_indexed | 2024-03-08T17:16:22Z |
| format | Article |
| id | doaj.art-f1dbc3116b0747fc86fc905f592cde73 |
| institution | Directory Open Access Journal |
| issn | 1687-0530 2356-8550 |
| language | Arabic |
| last_indexed | 2024-03-08T17:16:22Z |
| publishDate | 2024-01-01 |
| publisher | Assiut University, Faculty of Engineering |
| record_format | Article |
| series | JES: Journal of Engineering Sciences |
| spelling | doaj.art-f1dbc3116b0747fc86fc905f592cde732024-01-03T11:49:57ZaraAssiut University, Faculty of EngineeringJES: Journal of Engineering Sciences1687-05302356-85502024-01-01521315210.21608/jesaun.2023.246329.1283331889Comparison of Different Approaches for Combining Gravity Field Wavelengths for EgyptHussein Abd-Elmotaal0Mostafa Ashry1Atef Makhloof2Professor, Civil Engineering Dept., Faculty of Engineering, Minia University, Minia, EgyptLecturer, Civil Engineering Dept., Faculty of Engineering, Minia University, Minia, EgyptAssoc. Prof., Civil Engineering Dept., Faculty of engineering, Minia University, Minia, EgyptWithin the context of the remove-restore technique, this research seeks to determine the best combination of gravity field wavelengths for Egypt’s geoid computation. There are various methods for such a wavelength combination. It has been proposed to merge the regional data signals and the global geopotential earth models, potentially using a modified Stokes’ kernel with various methods. Firstly, from our computations, it can be concluded that the conventional remove-restore technique should not be applied for the determination of gravity anomalies and geoid determination. Also, the outcomes demonstrated that the estimated gravity anomalies utilizing the window approach are independent, the finest, and unbiased and have a minimal difference between the maximum and minimum values. The geoid produced from the GPS levelling has fewer differences between it and the geoids computed using the modified Stokes’ kernels as well as the geoid determined using the window technique than in the case of utilizing the unmodified Stokes’ classical kernel. Finally, the window approach gives, however, completely better outcomes compared to the Stokes unmodified kernel method.https://jesaun.journals.ekb.eg/article_331889_c01d2096779e35c65f376c86ce13153e.pdfremove- restore techniquegps-levellingheck geoidmeissl geoidgore geoid |
| spellingShingle | Hussein Abd-Elmotaal Mostafa Ashry Atef Makhloof Comparison of Different Approaches for Combining Gravity Field Wavelengths for Egypt JES: Journal of Engineering Sciences remove- restore technique gps-levelling heck geoid meissl geoid gore geoid |
| title | Comparison of Different Approaches for Combining Gravity Field Wavelengths for Egypt |
| title_full | Comparison of Different Approaches for Combining Gravity Field Wavelengths for Egypt |
| title_fullStr | Comparison of Different Approaches for Combining Gravity Field Wavelengths for Egypt |
| title_full_unstemmed | Comparison of Different Approaches for Combining Gravity Field Wavelengths for Egypt |
| title_short | Comparison of Different Approaches for Combining Gravity Field Wavelengths for Egypt |
| title_sort | comparison of different approaches for combining gravity field wavelengths for egypt |
| topic | remove- restore technique gps-levelling heck geoid meissl geoid gore geoid |
| url | https://jesaun.journals.ekb.eg/article_331889_c01d2096779e35c65f376c86ce13153e.pdf |
| work_keys_str_mv | AT husseinabdelmotaal comparisonofdifferentapproachesforcombininggravityfieldwavelengthsforegypt AT mostafaashry comparisonofdifferentapproachesforcombininggravityfieldwavelengthsforegypt AT atefmakhloof comparisonofdifferentapproachesforcombininggravityfieldwavelengthsforegypt |