Date: Fri, 22 Aug 2008 15:35:10 -0600 From: Andria Bilich Subject: [IGSMAIL-5819]: AGU session on Geodetic-Quality GNSS Stations To: igsmail@igscb.jpl.nasa.gov Message-id: <48AF310E.5040804@noaa.gov> Content-type: text/plain; charset=windows-1252; format=flowed Content-transfer-encoding: 7bit User-Agent: Thunderbird 2.0.0.16 (X11/20080715) Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 22 Aug 15:16:03 PDT 2008 Message Number 5819 ****************************************************************************** Author: Andria Bilich Dear colleagues, We invite you to submit an abstract to session G18: "Geodetic-Quality GNSS Stations: Location, Equipment, and Monumentation" at the 2008 AGU Fall Meeting (15-19 December, San Francisco, CA). Session details are given below. The deadline for abstract submission is 10 September 2359 UT. ============================================ Session G18: Geodetic-Quality GNSS Stations: Location, Equipment, and Monumentation http://www.agu.org/meetings/fm08/index.php/Program/SessionSearch/?show=detail&sessid=615 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 sites 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. Conveners: Giovanni Sella (1), Andria Bilich (1), Emma Hill (2), Chuck Meertens (3) 1) National Geodetic Survey 2) Harvard-Smithsonian Center for Astrophysics, Space Geodesy Group 3) UNAVCO -- ++++++++++++++++++++++++++++++++++++++++ Andria Bilich Geosciences Research Division National Geodetic Survey / NOS / NOAA (e) Andria.Bilich@noaa.gov (w) 303-497-5095 (f) 303-497-6513 325 Broadway St. E/GC2 Boulder, CO 80305 ++++++++++++++++++++++++++++++++++++++++