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Evaluation of the Global Altimetric Marine Gravity Field DTU15: Using Marine Gravity and GOCE Satellite Gravity

  • O. B. Andersen
  • P. Knudsen
  • S. Kenyon
  • S. Holmes
  • John K. Factor
Chapter
Part of the International Association of Geodesy Symposia book series

Abstract

Global marine gravity field modelling using satellite altimetry has been undergoing constant improvement since the launch of Cryosat-2 mission in 2010. With its 369 day-repeat Cryosat-2 provides one repeat of geodetic mission data with 8 km global resolution each year. Together with the completion of the Jason-1 end-of-life geodetic mission in 2011 and 2012, these new satellites has provided more than 4 times three times as much geodetic missions altimetric sea surface height observations than ever before. The higher precision of these new sea surface height observations compared with observations from ERS-1 and Geosat results in a dramatic improvement of the shorter wavelength of the gravity field (12–20 km) resulting in much favorable comparison with marine gravity. The pan-Arctic altimetric gravity field now surpassing 2008 Arctic Gravity Field project derived from multiple gravity field sources. A direct comparison between Arctic marine gravity fields and independent gravity field from the Gravity Field and Steady-State Ocean Circulation Explorer to degree and order 280 confirms this.

Keywords

GOCE Marine gravity Satellite altimetry 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • O. B. Andersen
    • 1
  • P. Knudsen
    • 1
  • S. Kenyon
    • 2
  • S. Holmes
    • 3
  • John K. Factor
    • 4
  1. 1.DTU SpaceKongens LyngbyDenmark
  2. 2.S2 AnalyticsArnoldUSA
  3. 3.SGT-incGreenbeltUSA
  4. 4.NGAArnoldUSA

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