Development of Analysis and Validation Methods for Time Series of the Geodetic-Geophysical Observing System (GFZ)
This work package focuses on the development of analysis and validation methods and tools that go beyond the simple comparisons of time series of individual parameter types and study the relationships and correlations between different parameter groups. Thereby, the following relationships are of special interest:
- Troposphere parameters and station coordinates (WP6100)
- Station coordinates and coordinate origin (WP6200)
- Coordinate origin, Earth orientation parameters and low-degree coefficients of the Earth's gravity field (WP6300)
- Kinematic sea level and low-degree coefficients of the Earth's gravity field (WP6400)
- Loading effects (WP6500)
- Variations in Earth rotation (AAM, OAM) (WP6600)
- LEO onboard co-location (WP6700)
Detailed descriptions of the work packages WP6100 - WP6700 may be found in the partial proposals. In general, it can be said that in the majority of these work packages the emphasis is put on the relationship between the parameter groups and the geodetic-geodynamic and the geodetic-geophysical interpretation. The careful validation of the results is a prerequisite for such an interpretation. For the time series that are computed from a combination of all techniques, we have to rely on external, independent information for a validation. Therefore, the validation has to be based on, e.g., time series of geophysical quantities such as loading effects computed from oceanic and atmospheric data, atmospheric and oceanic angular momentum (AAM, OAM) with high temporal resolution, temporal variations of the low-degree coefficients of the Earth's gravity field from analyses of the CHAMP and GRACE missions, etc. The investigations performed in WP6000 will therefore show, how reliably and accurately processes of the Earth system can be monitored and in which fields the space geodetic techniques may contribute substantially to the monitoring and understanding of the processes within the Earth system.
Results of Work Package 6000 (German)