10 Result(s)
within
Conference Paper
Rolf König
-
Chapter and Conference Paper
Impacts of the LARES and LARES-2 Satellite Missions on the SLR Terrestrial Reference Frame
LARES, an Italian satellite launched in 2012, and its successor LARES-2 approved by the Italian Space Agency, aim at the precise measurement of frame dragging predicted by General Relativity and other tests of...
-
Chapter and Conference Paper
The Assessment of the Temporal Evolution of Space Geodetic Terrestrial Reference Frames
The assessment of the accuracy and the stability of the global Terrestrial Reference Frames (TRFs) is a matter of great importance for the geodetic community. The classical Helmert transformation plays a cruci...
-
Chapter and Conference Paper
A Non-tidal Atmospheric Loading Model: On Its Quality and Impacts on Orbit Determination and C20 from SLR
Based on European Centre for Medium-Range Weather Forecasts (ECMWF) ERA-Interim data we model displacements of global station coordinates due to non-tidal atmospheric loading based on Farrel’s theory. We compa...
-
Chapter and Conference Paper
Simulation of VLBI Observations to Determine a Global TRF for GGOS
In this study, we present a global terrestrial reference frame (TRF) from simulated very long baseline interferometry (VLBI) observations. In the time span from 2008 until 2014, 695 standard VLBI rapid turnaro...
-
Chapter and Conference Paper
GGOS-SIM: Simulation of the Reference Frame for the Global Geodetic Observing System
The accuracy and stability requirements for the International Terrestrial Reference Frame (ITRF) postulated by the Global Geodetic Observing System (GGOS) are not met so far. The GGOS–SIM project builds a soft...
-
Chapter and Conference Paper
A Geocenter Time Series from a Combination of LAGEOS and GRACE Observations
The geocenter motion can be inferred by evaluating Satellite Laser Ranging (SLR) observations to the LAGEOS satellites. Within the dynamic orbit determination process the degree 1 coefficients of a spherical h...
-
Chapter and Conference Paper
Atmospheric Loading and Mass Variation Effects on the SLR-Defined Geocenter
The geocenter time series can conveniently be inferred by evaluating satellite orbit perturbations in a dynamical model. We base our approach on nearly 30 years of Satellite Laser Ranging (SLR) observations to...
-
Chapter and Conference Paper
Submonthly GRACE Solutions from Localizing Integral Equations and Kalman Filtering
An alternative approach for the analysis of GRACE inter-satellite range observations being processed in combination with current best knowledge GRACE orbits from improved GPS relative integer ambiguity fixing ...
-
Chapter and Conference Paper
Possibilities and Limits for Estimating a Dynamic and a Geometric Reference Frame Origin by the Integrated Approach Applied to the CHAMP–GRACE–GPS Constellation
The integrated approach, i.e. the simultaneous processing of GPS satellites and Low Earth Orbiters (LEOs), for satellite orbit determination and estimation of Earth system parameters, is applied to the CHAMP–G...
-
Chapter and Conference Paper
GFZ and DLR Contribution to a GPS Ground Network to Support the CHAMP Mission
The paper discusses various scientific/technical issues as network distribution, requirements for autonomous and permanently operating GPS stations, near real time data transfer and operational requirements an...
