On Removing Discrepancies Between Local Ties and GPS-Based Coordinates
- authored by
- S. Schön, H. Pham, T. Krawinkel
- Abstract
Local ties are vectors that link reference points of different space geodetic instruments at co-located stations. Discrepancies between local ties and solutions from space geodetic techniques weaken the determination of reference frames. Terrestrially determined local ties and GPS-derived coordinates differences can disagree at the cm-level due to suboptimal GPS processing. In this paper, we propose a post-processing correction strategy to reduce apparent height differences which occur when, unnecessarily, tropospheric delay are estimated between co-located stations or tropospheric constraints between co-located stations are not taken into account. A site-dependent correction factor is determined which stays constant over time and thus can be calibrated. The correction strategy is successfully applied to co-located stations in the pillar network of our institute where the local tie is well-controlled. We find that height discrepancies between levelling survey and post-processed GPS results can be reduced from the centimeter-level to some millimeters. This holds also true for co-located GPS stations of the EUREF Permanent Network.
- Organisation(s)
-
Institute of Geodesy
- Type
- Conference contribution
- Pages
- 245-252
- No. of pages
- 8
- Publication date
- 2018
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Computers in Earth Sciences, Geophysics
- Electronic version(s)
-
https://doi.org/10.1007/1345_2016_238 (Access:
Closed)
-
Details in the research portal "Research@Leibniz University"