****************************************************************************** dorismail 17-Feb-2019 19:36:21 Message No 1169 ****************************************************************************** Author: Geoffrey Blewitt Subject: IAG Symposium "Reference Systems and Frames" at IUGG General Assembly Dear Colleagues (with apologies for cross-postings), We would like to draw your attention to the "Reference Systems and Frames" session (G1) of the next IUGG General Assembly in Montreal (July 8-18, 2019). Please consider submitting an abstract to this session (see http://iugg2019montreal.com/g.html for this and other geodetic sessions). The deadline for submission of abstracts has been extended to March 1, 2019 at 12:00 Central European Time (CET). We are looking forward to your contributions and to seeing you in Montreal. Best regards, Geoff Blewitt, Johannes Boehm, Xavier Collilieux, Zinovy Malkin *************************************************************** IAG Symposium G01: Reference Systems and Frames *************************************************************** Convener: Geoffrey Blewitt (USA) Co-Conveners: Johannes Boehm (Austria), Xavier Collilieux (France), Zinovy Malkin (Russia) Description: Reference systems and frames are of primary importance for scientific research, satellite navigation, and geospatial applications. A precisely defined and accurate reference frame improves our understanding of Earth's rotation and its gravity field, sea level change with time and global environmental change, tectonic plate motion, glacial isostatic adjustment, geocenter motion, deformation due to the earthquake cycle, terrestrial water storage, ice-sheet melting, ocean loading, and volcanism. An accurate reference frame is also needed to position GNSS, SLR, and DORIS satellites, and Earth observation satellites and aircraft with geodetic sensors such as those used for ocean and ice-sheet altimetry, InSAR, gravimetry, and LiDAR. Furthermore, self-consistency is required to connect the terrestrial frame, celestial frame, and Earth rotation parameters to realize the inherent stability in orientation and scale provided by VLBI observations. Co-location, whether it be in space or on the ground, is also important to tie the various space geodetic techniques together into one consistent system. For this symposium, we solicit presentations dealing with theoretical aspects of reference systems and the practical realization of reference frames, as well as their various applications like those mentioned above and beyond. All the topics related to improvement of the accuracy and stability of the reference frames are also among the primary interests for this symposium. In particular, we seek contributions devoted to identification and mitigation of systematic errors in reference frames realizations. We also solicit presentations on new and emerging technologies applicable to the future of reference frames such as relativistic and quantum geodetic sensors.