HR: 10:20h
AN: G22A-01 INVITED [Abstracts]
TI: Combination of the Space-Geodetic Techniques for Monitoring the Earth's System
AU: * Rothacher, M
EM: rothacher@bv.tum.de
AF: Forschungseinrichtung Satellitengeod\"asie, TU Munich, Arcisstrasse 21, Munich, D-80290
Germany
AU: Schmid, R
EM: schmid@bv.tum.de
AF: Forschungseinrichtung Satellitengeod\"asie, TU Munich, Arcisstrasse 21, Munich, D-80290
Germany
AU: Steigenberger, P
EM: steigenberger@bv.tum.de
AF: Forschungseinrichtung Satellitengeod\"asie, TU Munich, Arcisstrasse 21, Munich, D-80290
Germany
AU: Svehla, D
EM: svehla@bv.tum.de
AF: Forschungseinrichtung Satellitengeod\"asie, TU Munich, Arcisstrasse 21, Munich, D-80290
Germany
AU: Thaller, D
EM: daniela.thaller@bv.tum.de
AF: Forschungseinrichtung Satellitengeod\"asie, TU Munich, Arcisstrasse 21, Munich, D-80290
Germany
AB:
The combination of all major space-geodetic techniques into an
global geodetic observing system (GGOS) must be a primary goal
in geodesy in the next years. A combination is important and
beneficial because (1) it helps to distinguish genuine
geodetic/geophysical signals from technique-specific systematic
biases, (2) it makes use of the complementarity of the
individual techniques to strengthen the solutions, (3) it allows
to benefit from observing instruments co-located
at the same site/satellite, (4) it is the only way to account for the
fact that there is, e.g., only one orientation of the Earth's rotation
axis for all techniques, only one tropospheric and ionospheric
refraction for VLBI, GPS and other microwave techniques, only one orbit
for a multi-technique satellite, etc., and to ensure the consistency
of the resulting geodetic products, and, finally (5) this approach is
crucial to get a more detailed view and understanding of the complexity of
the "System Earth" and its geophysical processes.
Benefits for geophysical
interpretations and Earth system monitoring, but also problems
resulting from combination approaches will be discussed and illustrated
with various examples.
DE: 1210 Diurnal and subdiurnal rotational variations
DE: 1229 Reference systems
DE: 1243 Space geodetic surveys
DE: 1247 Terrestrial reference systems
DE: 1294 Instruments and techniques
SC: Geodesy [G]
MN: 2004 AGU Fall Meeting