Delivered-To: igsmail@igscb.jpl.nasa.gov From: Jim Ray "(NGS" 301-713-2850 "x112)" Message-Id: <200409291937.PAA02491@ness.ngs.noaa.gov> Subject: [IGSMAIL-5020]: IGS ref frame paper now online To: igsmail@igscb.jpl.nasa.gov Date: Wed, 29 Sep 2004 15:37:07 -0400 (EDT) Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 29 Sep 12:37:53 PDT 2004 Message Number 5020 ****************************************************************************** Author: Jim Ray, Danan Dong, Zuheir Altamimi For your information, our position paper for the IGS workshop in Bern has been published as a review article in GPS Solutions: IGS reference frames: status and future improvements J. Ray, D. Dong, and Z. Altamimi Abstract The hierarchy of reference frames used in the International GPS Service (IGS) and the procedures and rationale for realizing them are reviewed. The Conventions of the International Earth Rotation and Reference Systems Service (IERS) lag developments in the IGS in a number of important respects. Recommendations are offered for changes in the IERS Conventions to recognize geocenter motion (as already implemented by the IGS) and to enforce greater model consistency in order to achieve higher precision for combined reference frame products. Despite large improvements in the internal consistency of IGS product sets, defects remain which should be addressed in future developments. If the IGS is to remain a leader in this area, then a comprehensive, long-range strategy should be formulated and pursued to maintain and enhance the IGS reference frame, as well as to improve its delivery to users. Actions should include the official designation of a high-performance reference tracking network whose stations are expected to meet the highest standards possible. GPS Solutions, DOI:10.1007/s10291-004-0110-x