Abstract
Since the release of the Danish Technical University DTU10 global marine gravity field in 2010, the amount of geodetic mission altimetry data has nearly tripled. The Cryosat-2 satellite have provided data along its 369 day near repeat since 2010 and as of May 2012 the Jason-1 satellite has been operating in a geodetic mission as part its end of life mission.
In this presentation, we perform an investigation of the impact of the Cryosat-2 and Jason-1 geodetic missions on high resolution marine gravity field mapping through comparison with recent high quality marine gravity measured by the United States Naval Ship Bowditch in the Western Pacific Ocean in 2006. Comparisons of pre and post Cryosat-2/Jason-1 gravity fields illustrated the importance of these new geodetic missions for altimeter marine gravity field mapping.
Altimetric gravity derived using 1 year of either Cryosat-2 or Jason-1 is nearly 10% better than gravity derived from retracked and reprocessed combined ERS-1 and Geosat in terms of lower standard deviation with marine gravity. The combination of data from all four geodetic mission data improves the agreement from around 4.1 mGal to around 3.1 mGal. Accounting for an error estimate of around 1 mGal in the marine gravity observations, it is concluded that for this particularly gravity survey region, the new gravity field from four geodetic missions has an accuracy of about 2 mGal.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Andersen OB (2010) The DTU10 global gravity field and mean sea surface – improvements in the Arctic. Presented at the 2nd international gravity field service symposium, Fairbanks, Alaska
Andersen OB, Knudsen P (1998) Global marine gravity field from the ERS-1 and GEOSAT geodetic mission altimetry. J Geophys Res 103:8129–8137
Andersen OB, Scharroo R (2011) Range and geophysical corrections in coastal regions: and implications for mean sea surface determination. In: Vignudelli S et al (eds) Coastal altimetry. Springer, Berlin, pp 103–145. doi:10.1007/978-3-642-12796-0_5
Andersen OB, Knudsen P, Berry PAM (2010) The DNSC08GRA global marine gravity field from double retracked satellite altimetry. J Geod 84:191–199. doi:10.1007/s00190-009-0355-9
Gardner JV (2006) Cruise report, USNS Bowditch: U.S. Law of the Sea cruise to map the western insular margin and 2500-m isobath of Guam and the Northern Marianas Islands: Cruise BD06-1, UNH-CCOM/JHC Tech Rep 06–100
Lillibridge JL, Smith WHF, Scharrroo R, Sandwell DT (2004) The Geosat geodetic mission 20th anniversary data product, AGU, 85(47), Fall Meet. Suppl., Abs SF43A–0786
Maus S, Green CM, Fairhead D (1998) Improved ocean-geoid resolution from retracked ERS-1 satellite altimeter waveforms. Geophys J Int 134(1):243–253
Pavlis NK, Holmes SA, Kenyon SC, Factor JK (2012) The development and evaluation of the earth gravitational model 2008 (EGM2008). J Geophys Res 117:B4
Sandwell DT, Smith WHF (2005) Retracking ERS-1 altimeter waveforms for optimal gravity field recovery. Geophys J Int 163:79–89. doi:10.1111/j.1365-246X.2005.02724
Sandwell DT, Smith WHF (2009) Global marine gravity from retracked Geosat and ERS-1 altimetry: ridge segmentation versus spreading rate. J Geophys Res 114:B01411. doi:10.1029/2008JB006008
Sandwell DT, Garcia E, Soofi K, Wessel P, Chandler M, Smith WHF (2013) Towards 1-mGal accuracy in global marine gravity from Cryosat-2, Envisat and Jason-1. The Leading Edge, Houston, pp 892–898
Stenseng L, Andersen OB (2012) Preliminary gravity recovery from CryoSat-2 data in the Baffin Bay. Adv Space Res 50(8):1158–1163
Wingham D et al (2006) CryoSat-2: a mission to determine the fluctuations in Earths land and marine ice fields. Adv Space Res 37(4):841–871
Acknowledgements
The authors would like to thank the RADS (rads.tudelft.nl) team for making altimetric data as well as corrections readily available to the user. Also the authors would like to acknowledge the NOAA National Geophysical Data Center for making the Bowditch marine gravity data available to the scientific community.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 Springer International Publishing Switzerland
About this paper
Cite this paper
Andersen, O.B., Jain, M., Knudsen, P. (2015). The Impact of Using Jason-1 and Cryosat-2 Geodetic Mission Altimetry for Gravity Field Modeling. In: Rizos, C., Willis, P. (eds) IAG 150 Years. International Association of Geodesy Symposia, vol 143. Springer, Cham. https://doi.org/10.1007/1345_2015_95
Download citation
DOI: https://doi.org/10.1007/1345_2015_95
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-24603-1
Online ISBN: 978-3-319-30895-1
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)