TY - CHAP
T1 - Estimating Sub-Monthly Global Mass Transport Signals Using GRACE, GPS and OBP Data Sets
AU - Jansen, M. J.F.
AU - Gunter, B. C.
AU - Rietbroek, R.
AU - Dahle, C.
AU - Kusche, J.
AU - Flechtner, F.
AU - Brunnabend, S. E.
AU - Schröter, J.
PY - 2010/2/26
Y1 - 2010/2/26
N2 - In an effort to learn more about the sub-monthly variations in the global mass transport processes of the Earth, a study has been performed in which the feasibility of using weekly GRACE gravity solutions, in combination with GPS displacement data and ocean bottom pressure (OBP) models, is examined. A sensitivity study was conducted in which a range of solutions using different combinations of these three data sets were compared to each other, and with the time span of each combination ranging from 1 to 4 weeks. Data sets included weekly GFZ RL04 GRACE covariance matrices, as well as IGS GPS solutions and a new FESOM global OBP model, developed at AWI. The results showed that the temporal resolution of the solutions could be increased, while still maintaining reasonable levels of accuracy, if either GPS or OBP data were included in the combination. In particular, a 2-week triple combination of GRACE, GPS and OBP data was found to have approximately the same accuracy over land as a standard monthly GRACE solution, up to degree and order 30. These results provide encouraging support for future work involving real-data combinations.
AB - In an effort to learn more about the sub-monthly variations in the global mass transport processes of the Earth, a study has been performed in which the feasibility of using weekly GRACE gravity solutions, in combination with GPS displacement data and ocean bottom pressure (OBP) models, is examined. A sensitivity study was conducted in which a range of solutions using different combinations of these three data sets were compared to each other, and with the time span of each combination ranging from 1 to 4 weeks. Data sets included weekly GFZ RL04 GRACE covariance matrices, as well as IGS GPS solutions and a new FESOM global OBP model, developed at AWI. The results showed that the temporal resolution of the solutions could be increased, while still maintaining reasonable levels of accuracy, if either GPS or OBP data were included in the combination. In particular, a 2-week triple combination of GRACE, GPS and OBP data was found to have approximately the same accuracy over land as a standard monthly GRACE solution, up to degree and order 30. These results provide encouraging support for future work involving real-data combinations.
KW - ITC-CV
U2 - 10.1007/978-3-642-10634-7_78
DO - 10.1007/978-3-642-10634-7_78
M3 - Chapter
AN - SCOPUS:84884371696
SN - 9783642106330
T3 - International Association of Geodesy Symposia
SP - 587
EP - 593
BT - Gravity, Geoid and Earth Observation - IAG Commission 2
PB - Springer
CY - Berlin
T2 - IAG International Symposium on Gravity, Geoid and Earth Observation 2008
Y2 - 23 June 2008 through 27 June 2008
ER -