Reference : On the Scientific Applications of IGS Products: An Assessment of the Reprocessed TIG...
Scientific congresses, symposiums and conference proceedings : Unpublished conference
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Computational Sciences
http://hdl.handle.net/10993/31649
On the Scientific Applications of IGS Products: An Assessment of the Reprocessed TIGA Solutions and Combined Products
English
Hunegnaw, Addisu [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Teferle, Felix Norman mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Abraha, Kibrom Ebuy [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Santamaria-Gomez, Alvaro [University of La Rochelle]
Gravelle, Mederic [University of La Rochelle]
Wöppelmann, Guy [University of La Rochelle]
Schöne, Tilo [German Research Centre for Geosciences (GFZ)]
Deng, Zhiguo [German Research Centre for Geosciences (GFZ)]
Bingley, Richard [British Isles continuous GNSS Facility (BIGF)]
Hansen, Dionne [British Isles continuous GNSS Facility (BIGF)]
Sanchez, Laura [German Geodetic Research Institute Technical University of Munich]
Moore, Michael [Geoscience Australia]
3-Jul-2017
No
Yes
International
IGS Workshop 2017, Pathways to Improved Precision
03-07-2017 to 07-07-2017
International GNSS Service
Paris
France
[en] Global Navigation Satellite System ; Vertical Land Movements ; Sea Level ; Tide Gauges ; TIGA ; Combination
[en] Global sea levels have risen since the early 19th century and this rise is likely to accelerate through the 21st century and beyond. Much of the past information on sea level rise stems from the instrumental records of tide gauges, which measure changes in sea level relative to a tide gauge benchmark (TGBM) situated on land. In order to assess regional or global sea level changes the vertical land movements (VLM) at the tide gauge and its TGBM need to be monitored. GNSS, in particular GPS, has been recognized as one space-geodetic technique to provide highly accurate estimates of VLM in a geocentric reference frame for tide gauges and their TGBMs. As it turned out, this scientific application of GNSS poses the most stringent requirements on the consistency and homogeneity on the data, processing strategies, satellite products, bias models and reference frames used in the analysis of GNSS measurements.
Under the umbrella of the International GNSS Service (IGS), the Tide Gauge Benchmark Monitoring (TIGA) Working Group (WG) has the objective to provide highly-accurate positions and VLM estimates for a global network of tide gauges contributing to the Global Sea Level Observing System (GLOSS) and the Permanent Service for Mean Sea Level (PSMSL). As such TIGA forms an important contribution of the IGS to the goals of the Global Geodetic Observing System (GGOS), the Global Climate Observing System (GCOS) and the World Climate Research Programme (WCRP). To achieve the TIGA-WG objectives, five TIGA Analysis Centers (TACs) contributed re-processed global GPS network solutions to TIGA, employing the latest bias models and processing strategies in accordance with the second IGS re-processing campaign (repro2). These individual TAC solutions were then used to compute the combined products by the TIGA Combination Centre (TCC) at the University of Luxembourg using an in-house modified version of the CATREF software package.
In this study, we present and internally evaluate the individual TAC and TIGA combined products. We investigate station positions, scale and origin biases, including their frequency content. We also externally evaluate the combined products, particularly the VLM estimates, using solutions from the ITRF2008, ITRF2014 and the glacial isostatic adjustment model ICE-6G (VM5a). Finally, we draw some conclusions on the recent advances and remaining limitations of the various IGS products required for the challenging application to sea level studies.
University of Luxembourg: High Performance Computing - ULHPC
University of Luxembourg - UL
Researchers ; Professionals
http://hdl.handle.net/10993/31649

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