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  1. No Access

    Article

    Recovering Bathymetry of the Gulf of Guinea Using Altimetry-Derived Gravity Field Products Combined via Convolutional Neural Network

    Traditional methods of bathymetry inversion from altimetry data often use gravity anomalies and/or vertical gravity anomaly gradients. These two gravity products are usually computed from vertical deflections;...

    Richard Fiifi Annan, **aoyun Wan in Surveys in Geophysics (2022)

  2. No Access

    Article

    Accuracy requirement for altimetry observations for bathymetry inversion using gravity anomaly and gravity gradients

    The gravity anomaly and vertical gravity gradient obtained from satellite altimetry observations play a great role in global bathymetry inversion. In order to design next generation of altimetry satellites for...

    Fei Wang, **aoyun Wan, Richard Fiifi Annan in Arabian Journal of Geosciences (2022)

  3. Article

    Open Access

    Assessment of HY-2A GM data by deriving the gravity field and bathymetry over the Gulf of Guinea

    Nine cycles of Haiyang-2A (HY-2A) IGDR (Interim Geophysical Data Record) data are used to derive gravity products over the Gulf of Guinea (15° W–5° E, 4° S–4° N). Firstly, the sea surface heights (SSH) and ver...

    **aoyun Wan, Richard Fiifi Annan, Wenbin Wang in Earth, Planets and Space (2020)

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  4. No Access

    Article

    Map** seafloor topography of gulf of Guinea using an adaptive meshed gravity-geologic method

    An adaptive mesh form of the gravity-geologic method, known as improved Gravity-Geologic Method (iGGM), was implemented on free-air gravity anomalies and shipborne depths to obtain an improved 1′ × 1′ bathymet...

    Richard Fiifi Annan, **aoyun Wan in Arabian Journal of Geosciences (2020)