TY - JOUR
T1 - GOCO05c: A New Combined Gravity Field Model Based on Full Normal Equations and Regionally Varying Weighting
AU - Fecher, Thomas
AU - Pail, Roland
AU - Gruber, Thomas
AU - Schuh, Wolf-Dieter
AU - Kusche, Jürgen
AU - Brockmann, Jan Martin
AU - Loth, Ina
AU - Müller, Sven
AU - Eicker, Annette
AU - Schall, Judith
AU - Mayer-Gürr, Torsten
AU - Kvas, Andreas
AU - Klinger, Beate
AU - Rieser, Daniel
AU - Zehentner, Norbert
AU - Baur, Oliver
AU - Höck, Eduard
AU - Krauß, Sandro
AU - Jäggi, Adrian
AU - Meyer, Ulrich
AU - Prange, Lars
AU - Maier, Andrea
PY - 2017/1/7
Y1 - 2017/1/7
N2 - GOCO05c is a gravity field model computed as a combined solution of a satellite-only model and a global data set of gravity anomalies. It is resolved up to degree and order 720. It is the first model applying regionally varying weighting. Since this causes strong correlations among all gravity field parameters, the resulting full normal equation system with a size of 2 TB had to be solved rigorously by applying high-performance computing. GOCO05c is the first combined gravity field model independent of EGM2008 that contains GOCE data of the whole mission period. The performance of GOCO05c is externally validated by GNSS–levelling comparisons, orbit tests, and computation of the mean dynamic topography, achieving at least the quality of existing high-resolution models. Results show that the additional GOCE information is highly beneficial in insufficiently observed areas, and that due to the weighting scheme of individual data the spectral and spatial consistency of the model is significantly improved. Due to usage of fill-in data in specific regions, the model cannot be used for physical interpretations in these regions.
AB - GOCO05c is a gravity field model computed as a combined solution of a satellite-only model and a global data set of gravity anomalies. It is resolved up to degree and order 720. It is the first model applying regionally varying weighting. Since this causes strong correlations among all gravity field parameters, the resulting full normal equation system with a size of 2 TB had to be solved rigorously by applying high-performance computing. GOCO05c is the first combined gravity field model independent of EGM2008 that contains GOCE data of the whole mission period. The performance of GOCO05c is externally validated by GNSS–levelling comparisons, orbit tests, and computation of the mean dynamic topography, achieving at least the quality of existing high-resolution models. Results show that the additional GOCE information is highly beneficial in insufficiently observed areas, and that due to the weighting scheme of individual data the spectral and spatial consistency of the model is significantly improved. Due to usage of fill-in data in specific regions, the model cannot be used for physical interpretations in these regions.
U2 - 10.1007/s10712-016-9406-y
DO - 10.1007/s10712-016-9406-y
M3 - Article
SN - 1573-0956
VL - 2017
SP - 571
EP - 590
JO - Surveys in Geophyhsics
JF - Surveys in Geophyhsics
IS - 38
ER -