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| G18: | Geodetic-Quality GNSS Stations: Location, Equipment, and Monumentation |
| Sponsor: |
Geodesy
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| Convener: |
Giovanni Sella National Geodetic Survey 1315 E West Hwy, SSMC3-8716 Silver Spring, MD, USA 301-713-3198 x126 giovanni.sella@noaa.gov Andria Bilich National Geodetic Survey 325 Broadway St. E/GC2 Boulder, CO, USA 303-397-5095 andria.bilich@noaa.gov Emma Hill Harvard-Smithsonian Center for Astrophysics Space Geodesy Group 60 Garden Street, MS 42 Cambridge, MA, USA 617-495-7075 ehill@cfa.harvard.edu Chuck Meertens UNAVCO UNAVCO Facility Director 6350 Nautilus Drive Boulder, CO, USA 303-381-7465 chuckm@unavco.org |
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1294 6994 .
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| Description: |
When interpreting GNSS site coordinates, geodesists and geophysists focus their efforts on minimizing GNSS signal distortions (noise, measurement error, and modeling error) while maximizing the precision and accuracy of calculated positions. Recent studies have advanced the characterization and removal of sources of noise and error in GNSS a priori models, thereby improving the physical models used when computing position from the observed signals and allowing refined analysis such as the IGS reprocessing effort that is currently underway. Yet we recognize that mitigating these signal distortion effects can be much more challenging than avoiding the problems in the first place. Thus an additional area that has begun getting attention is the more basic one of a site’s physical location, choice of monument type, and GNSS equipment (receiver, antenna, mount, radome, etc.). In the upcoming years, new GNSS systems are coming online and an increasing number of permanent geodetic GNSS sites are being installed (by both private and public institutions). At the same time some users are moving away from analyzing 24-hour long data sets to shorter ones, and are increasingly at the mercy of site-dependent errors. Thus, it is time for the geodetic community to renew discussion on choices of GNSS sites, equipment, and monuments to properly leverage data analysis advances at a time of GNSS network expansion and changes in analysis methods. We solicit papers on factors which affect the quality of geodetic GNSS sites and the data collected at these stations. Topics include but are not limited to site-dependent effects such as multipath (environmental and equipment), sky visibility, and radio interference; time-varying environmental effects (e.g. vegetation, rainfall, snow); and monument type, stability, and location. Papers which discuss the characterization and reduction of GNSS signal propagation errors in terms of site design and choice of equipment are especially encouraged. |
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