On Removing Discrepancies Between Local Ties and GPS-Based Coordinates
- verfasst von
- 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.
- Organisationseinheit(en)
-
Institut für Erdmessung
- Typ
- Aufsatz in Konferenzband
- Seiten
- 245-252
- Anzahl der Seiten
- 8
- Publikationsdatum
- 2018
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Computer in den Geowissenschaften, Geophysik
- Elektronische Version(en)
-
https://doi.org/10.1007/1345_2016_238 (Zugang:
Geschlossen)
