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The DTU17 Global Marine Gravity Field: First Validation Results

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Book cover Fiducial Reference Measurements for Altimetry

Part of the book series: International Association of Geodesy Symposia ((IAG SYMPOSIA,volume 150))

Abstract

The most recent released global marine gravity field from DTU Space takes into account the new SARAL/AltiKa geodetic mission initiated in 2016 along with new improved Arctic processing of the Cryosat-2 mission. With its 369 days repeat cycle, Cryosat-2 provides one repeat of geodetic mission data with 8 km global resolution each year since its launch in 2010. Together with the Jason-1 end-of-life geodetic mission in 2012 and 2013, we now have more than five times as many geodetic missions sea surface height observations compared with the old ERS-1 and Geosat geodetic missions.

The DTU17 has been derived focusing on improving the coastal and Arctic gravity field, enhancing the shorter wavelength of the gravity field (10–15 km). For DTU17, we find a substantial improvement in marine gravity mapping as shown through comparison with high quality airborne data flown north of Greenland in 2009.

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Author information

Authors and Affiliations

  1. DTU Space, Copenhagen, Denmark

    O. B. Andersen & P. Knudsen

Authors
  1. O. B. Andersen
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  2. P. Knudsen
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Corresponding author

Correspondence to O. B. Andersen .

Editor information

Editors and Affiliations

  1. Laboratory of Geodesy and Geomatics Engineering, School of Mineral Resources Engineering, Technical University of Crete, Chania, Greece

    Stelios P. Mertikas

  2. Institute of Astronomical and Physical Geodesy, Technische Universität München, Munich, Germany

    Roland Pail

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Andersen, O.B., Knudsen, P. (2019). The DTU17 Global Marine Gravity Field: First Validation Results. In: Mertikas, S., Pail, R. (eds) Fiducial Reference Measurements for Altimetry. International Association of Geodesy Symposia, vol 150. Springer, Cham. https://doi.org/10.1007/1345_2019_65

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