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  1. No Access

    Article

    An alternative geoid model for Africa using the shallow-layer method

    The aim of the current investigation is to determine an alternative geoid model for Africa using the shallow-layer method. The shallow-layer method, following the basic definition of the geoid, differs essenti...

    Mostafa Ashry, Wen-Bin Shen, Hussein A. Abd-Elmotaal in Studia Geophysica et Geodaetica (2021)

  2. No Access

    Article

    Effect of great lakes on gravity reduction and geoid determination caused by unclassified DTMs: case study for Lake Victoria, Africa

    The determination of the gravimetric geoid is based on the magnitude of gravity observed at the topographic surface of the Earth. In order to satisfy Laplace’s equation, the masses between the surface of the E...

    Hussein A. Abd-Elmotaal, Kurt Seitz, Mostafa Ashry, Bernhard Heck in Journal of Geodesy (2020)

  3. No Access

    Chapter and Conference Paper

    The African 3″× 3″ DTM and Its Validation

    This paper deals with creating a fine digital terrain model (DTM) for Africa and the surrounding region covering the window 42∘S ≤ ϕ ≤ 44∘N, 22∘W ≤ λ ≤ 62∘E using the Advanced Spaceborne Thermal Emission and Refl...

    Hussein A. Abd-Elmotaa, Atef Makhloof… in International Symposium on Gravity, Geoid … (2019)