Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Richard Fiifi Annan"'
Publikováno v:
Geodesy and Geodynamics, Vol 12, Iss 1, Pp 31-42 (2021)
Although satellite gravity gradient data plays a great role in determining short-wavelength part of static gravity field model, accuracy of the long-wavelength part of gravity field model recovered by them are poor, which leads to only a few applicat
Externí odkaz:
https://doaj.org/article/dcee518f801349fa9ba64e0372630bc5
Publikováno v:
Earth, Planets and Space, Vol 72, Iss 1, Pp 1-13 (2020)
Abstract 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 vertical deflections are de
Externí odkaz:
https://doaj.org/article/1ec1c7e351f44ebdb92e359acc411fda
Autor:
Richard Fiifi Annan, Xiaoyun Wan
Publikováno v:
Frontiers in Earth Science, Vol 9 (2021)
A regional gravity field product, comprising vertical deflections and gravity anomalies, of the Gulf of Guinea (15°W to 5°E, 4°S to 4°N) has been developed from sea surface heights (SSH) of five altimetry missions. Though the remove-restore techn
Externí odkaz:
https://doaj.org/article/89c46c1bc409487b8f3a113a6baa0c28
Publikováno v:
Frontiers in Earth Science, Vol 9 (2021)
Marine gravity data from altimetry satellites are often used to derive bathymetry; however, the seafloor density contrast must be known. Therefore, if the ocean water depths are known, the density contrast can be derived. This study experimented the
Externí odkaz:
https://doaj.org/article/51f7c1ead667486f87f81cdb4c7dfd52
Publikováno v:
Geoplanning: Journal of Geomatics and Planning, Vol 3, Iss 2, Pp 87-92 (2016)
Spirit levelling has been the traditional means of determining Reduced Levels (RL’s) of points by most surveyors. The assertion that the level instrument is the best instrument for determining elevations of points needs to be reviewed; this is beca
Externí odkaz:
https://doaj.org/article/bf7f6f358bb34702b766bd87e4a81e60
Publikováno v:
Remote Sensing, Vol 12, Iss 14, p 2287 (2020)
The first Chinese altimetry satellite, Haiyang-2A (HY-2A), which was launched in 2011, has provided a large amount of sea surface heights which can be used to derive marine gravity field. This paper derived the vertical deflections and gravity distur
Externí odkaz:
https://doaj.org/article/36111afd81ca42798bdb3d1c89b9d8bd
Publikováno v:
Sensors, Vol 20, Iss 9, p 2465 (2020)
The traditional altimetry satellite, which is based on pulse-limited radar altimeter, only measures ocean surface heights along tracks; hence, leads to poorer accuracy in the east component of the vertical deflections compared to the north component,
Externí odkaz:
https://doaj.org/article/1c546a06d4694701978b8b1c9924ffce
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 61:1-9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30c48de6e1a56cb3f5902b417f19d3b2
https://doi.org/10.1109/tgrs.2023.3242967
https://doi.org/10.1109/tgrs.2023.3242967
Autor:
Richard Fiifi Annan, Xiaoyun Wan
Publikováno v:
Surveys in Geophysics. 43:1541-1561
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::431a3bb8839e28e4ffa7d2aceb168586
https://doi.org/10.1007/s10712-022-09720-5
https://doi.org/10.1007/s10712-022-09720-5
Publikováno v:
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Gravity field products can be used to derive bathymetry. However, previous studies usually adopted gravity anomalies and vertical gravity gradients. Indeed, gravity gradient tensor has six components, all of which should contain bathymetric informati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::506166b86d91f31f6496b2f3db7bff62
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017010
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017010
