Abstract
This paper summarises the crossover adjustment of approximately 90,000-line-km of ship-track gravity observations around New Zealand. The adjustment reduced the standard deviation of the ∼106 crossovers from ∼2.0 mgal to ∼0.3 mgal. These data were then used to assess four different grids of satellite-altimeter-derived gravity anomalies. The KMS02 altimeter grid was selected for use around New Zealand as it gave a better fit to the coastal ship-track data. Least-squares collocation was then used to ‘drape’ the altimetry onto the crossover-adjusted ship-tracks to counter the well-known problems with satellite altimeter data near the coast. The precision of this merged ship-altimeter gravity dataset is estimated to be 3.5 mgal.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Andersen OB, Knudsen P, Trimmer R (2004) Improving high-resolution altimetric gravity field mapping (KMS02). Proc IUGG General Assembly, Sapporo, Japan 2003, Springer, Berlin, in press
Andersen OB, Knudsen P (2000) The role of satellite altimetry in gravity field modelling in coastal areas, Phys Chem. Earth 25(1): 17–24
Brett J (2004) Marine gravity crossover adjustment for New Zealand, Report to Land Information New Zealand, Intrepid Geophysics, Melbourne, Australia
Deng XL, Featherstone WE, Hwang C (2002) Estimation of contamination of ERS-2 and Poseidon satellite radar altimetry close to the coasts of Australia, Marine Geodesy 25(4): 249–271
Denker H, Roland M (2004) Compilation and evaluation of a consistent marine gravity data set surrounding Europe., Proc IUGG General Assembly, Sapporo, Japan 2003, Springer, Berlin, in press
Featherstone WE (2003) Comparison of different satellite altimeter-derived gravity anomaly grids with ship-borne gravity data around Australia, in: Tziavos IN (ed) Gravity and Geoid 2002, Dept of Surv & Geodesy, Aristotle Univ of Thessaloniki, pp.326–331
Hwang C, Hsu H-Y, Jang R-J (2002) Global mean sea surface and marine gravity anomaly from multi-satellite altimetry: applications of deflection-geoid and inverse Vening Meinesz formulae, J Geod 76(8): 407–418
Lemoine FG, Kenyon SC, Factor RG, Trimmer RG, Pavlis NK, Chinn DS, Cox CM, Klosko SM, Luthcke SB, Torrence MH, Wang YM, Williamson RG, Pavlis EC, Rapp RH, Olson TR (1998) The development of the joint NASA GSFC and the National Imagery and Mapping Agency (NIMA) geopotential model EGM96, NASA Tech rep NASA/TP-1998-206861, Goddard Space Flight Center, Greenbelt, Maryland
Moritz H (1980) Geodetic reference system 1980, Bull Geod 54(4): 395–405
Sandwell DT, Smith WHF (1997) Marine gravity anomaly from GEOSAT and ERS 1 satellite altimetry, J Geophys Res 102(B5): 10039–10054
Strykowski G, Forsberg R (1998) Operational merging of satellite airborne and surface gravity data by draping techniques. in: Forsberg R, Feissl M, Dietrich R (eds) Geodesy on the Move, Springer, Berlin, 207–212
Tapley BD, Bettadpur S, Watkins M, Reigber Ch (2004) the gravity recovery and climate experiment: mission overview and early results. Geophys Res Lett 31, L09607: doi 10.1029/2004GL019920
Tscherning CC, Forsberg R, Knudsen P (1992) The GRAVSOFT package for geoid determination. in: Holota P, Vermeer M (eds.) Proc 1st Continental Workshop on the Geoid in Europe, Prague, May, ISBN 80-901319-2-1, pp. 327–334
Wang YM (2001) GSFC00 mean sea surface, gravity anomaly, and vertical gravity gradient from satellite altimeter data. J Geophys Res 106(C12): 31167–31174
Wessel P, Watts AB (1988) On the accuracy of marine gravity measurements, J Geophys Res 94(B4): 7685–7729
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2005 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Amos, M., Featherstone, W., Brett, J. (2005). Crossover Adjustment of New Zealand Marine Gravity Data, and Comparisons with Satellite Altimetry and Global Geopotential Models. In: Jekeli, C., Bastos, L., Fernandes, J. (eds) Gravity, Geoid and Space Missions. International Association of Geodesy Symposia, vol 129. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-26932-0_46
Download citation
DOI: https://doi.org/10.1007/3-540-26932-0_46
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-26930-4
Online ISBN: 978-3-540-26932-8
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)