From gblewitt at unr.edu Fri Dec 20 15:38:19 2002 From: gblewitt at unr.edu (Geoff Blewitt) Date: Fri, 20 Dec 2002 15:38:19 -0800 (Pacific Standard Time) Subject: [IGSMAIL-4216]: Workshop on the GPS Vertical, April 2-4, 2003 Message-ID: ****************************************************************************** IGS Electronic Mail 20 Dec 15:38:12 PST 2002 Message Number 4216 ****************************************************************************** Authors: G. Blewitt, K. Larson, T. van Dam, and O. Francis Dear IGS Community, This is to announce a workshop in Luxembourg the week before the AGU-EGS meeting. For more information including registration and on-line abstract submission please see http://www.ecgs.lu "Workshop on the State of GPS Vertical Positioning Precision: Separation of Earth Processes by Space Geodesy" Sponsored by the European Center for Geodynamics and Seismology (ECGS) and the Fonds National de la Recherche (Luxembourg) (FNR) Scientific Committee: G. Blewitt K. Larson T. van Dam O. Francis Others welcome Venue: Luxembourg City, Luxembourg at the hotel Parc-Bell-Vue http://www.hpb.lu/bv/index.html Date: 2-4 April, 2003 (week before EGS) Registration Fee: 50 euros. Registration is limited to 50 participants! ABSTRACT: Observed signals in GPS data are the sum of noise and real crustal motions. Interpretation of the data depends on our ability to extract a signal of interest from the total signal. This workshop will highlight the difficulties associated with extracting a signal such as post-glacial rebound, plate tectonics or loading, from vertical geodetic data. FORMAT: Session Chairs will be asked to invite appropriate papers, to coordinate contributed papers in their session, and to coordinate written proceedings, including a paper which summarizes useful outcomes from the discussions. In the spirit of a true workshop, presentations may be as short as a single figure or a brief introductory statement, followed by discussion. The Session Chairs may wish to start each session with one review type of paper to provide a context for the session; however, AGU-EGS types of "complete" presentations with little opportunity for open discussion are discouraged. The Session Chairs should provide a (partial) list of discussion topics in advance of the meeting to give all workshop participants an opportunity to prepare and contribute some material for discussion. Morning Sessions: Oral Invited Speakers, Pertinent Contributed Speakers Afternoon Sessions: Oral/Posters Publication Proceedings: 'Cahiers du Centre Europen de Godynamique et de Sismologie' (Luxembourg Funding Requirement) General layout of the meeting, including suggested areas of discussion: DAY 1 Theme: Empirical Characteristics of GPS Vertical Data - Empirical measures over different spatial and temporal scales - Empirical measures in the wavelength and frequency domains - Effect of frame and coordinate realization methods on time series. - Effect of processing models and strategies on time series. - What "appears" to be signal, and what "appears" to be noise? - What characteristics appear to be limit the signal to noise ratio? - What is unexplained, surprising, or interesting? DAY 2 Theme: Performance and Limitations of Models - What are the limitations of GPS processing models and software? - How well do displacement models explain observed characteristics? - Which processing strategies minimize observed-modeled vertical? - What are the limitations of current vertical displacement models? - Vertical displacement models: observation or coordinate level? - What are the limitations of reference frames and realization? DAY 3 Theme: Resolutions - What should we do? - What do we recommend for processing models, strategies, frames? - What do we recommend for vertical displacement models? - What future research might improve vertical data quality? - How can errors be better characterized/quantified/understood? - How might we improve models of vertical displacements? For more information including registration and on-line abstract submission please see http://www.ecgs.lu ---------------- Dr Geoff Blewitt Research Professor University of Nevada, Reno http://www.nbmg.unr.edu/staff/geoff.htm 1-775-784-6691 ext 171