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Forste, C., Bruinsma, S.L., Shako, R., Marty, J.C., Flechtner, F., Abrikosov, O., Dahle, C., Lemoine, J.M., Neumayer, K.H., Biancale, R., Barthelmes, F., Konig, R. and Balmino, G. (2011) EIGEN-6—A New Combined Global Gravity Field Model Including GOCE Data from the Collaboration of GFZ Potsdam and GRGS-Toulouse. Geophysical Research Abstracts, Vol. 13, EGU2011-3242-2, EGU General Assembly, Vienna.

has been cited by the following article:

• TITLE: On the Accuracy Assessment of the Latest Releases of GOCE Satellite-Based Geopotential Models with EGM2008 and Terrestrial GPS/Levelling and Gravity Data over Egypt

  AUTHORS: Mohamed El-Ashquer, Basem Elsaka, Gamal El-Fiky

  KEYWORDS: GOCE-Based GGMs, Free-Air Gravity Anomalies, GPS/Levelling Data, Spectral Enhancement Method (SEM)

  JOURNAL NAME: International Journal of Geosciences, Vol.7 No.11, November 29, 2016

  ABSTRACT: The Global Geopotential Models (GGMs) of GOCE (Gravity Recovery and steady- state Ocean Circulation Explorer) differ globally as well as regionally in their accuracy and resolution based on the maximum degree and order (d/o) of the fully normalized spherical harmonic (SH) coefficients, which express each GGM. The main idea of this study is to compare the free-air gravity anomalies and quasi geoid heights determined from several recent GOCE-based GGMs with the corresponding ones from the Earth Gravitational Model 2008 (EGM2008) over Egypt on the one hand and with ground-based measurements on the other hand. The results regarding to the comparison of GOCE-based GGMs with terrestrial gravity and GPS/levelling data provide better improvement with respect to EGM2008. The 4th release GOCE-based GGM developed with the use of space-wise solution strategy (SPW_R4) approximates the gravity field well over the Egyptian region. The SPW_R4 model is accordingly suggested as a reference model for recovering the long wavelength (up to SH d/o 200) components of quasi geoid heights when modelling the gravimetric quasi-geoid over the Egypt. Finally, three types of transformation models: Four-, Five- and Seven-parameter transformations have been applied to reduce the data biases and to provide a better fitting of quasi geoid heights obtained from the studied GOCE-based GGMs to those from GPS/levelling data. These models reveal that the standard deviation of vertical datum over Egypt is at the level of about 32 cm.