| Date: | 2011-01-27 09:34:00 | |
| Sender: | Richard Gross <Gross, Richard S (335N) <richard.s.gross@jpl.nasa.gov>> | |
| Subject: | [SLR-Mail] No. 1957: Earth Rotation Session at IUGG | |
| Author: | Richard Gross | |
| Content: | ******************************************************************************** SLR Electronic Mail 2011-01-27 09:34:00 UTC Message No. 1957 ******************************************************************************** Author: Richard Gross Subject: Earth Rotation Session at IUGG Dear Colleagues - As part of the XXV General Assembly of the IUGG that will be held in Melbou= rne, Australia during 28 June 2011 to 07 July 2011 there will be an IAG Sym= posium on ”Monitoring and Modeling Earth Rotation”. The description of the = Symposium is given below. On behalf of the conveners I would like to draw your attention to this Symp= osium and encourage you to participate in it. We are developing a rich symp= osium that will be a forum for discussing the monitoring and modelling of t= he Earth=92s rotation and the use of Earth rotation measurements to further= our understanding of the Earth=92s complex, interacting systems. We hope t= hat you will be able to join us in Melbourne for this exciting symposium. M= ore information about the XXV General Assembly of the IUGG can be obtained = from its web site at Please note that the deadline for submitting abstracts is 01 February 2011. Hope to see you in Melbourne! Best regards, Richard .......................................................... G03: Monitoring and Modeling Earth Rotation The Earth=92s rotation is highly irregular. It varies on all observable tim= e scales, from subdaily to decadal and longer. The gravitational attraction= of the Sun, Moon, and planets causes the Earth to precess and nutate in sp= ace and, by periodically deforming the solid and fluid parts of the Earth, = causes periodic changes in the Earth=92s rate of rotation and wobble. Torqu= es acting on the solid Earth associated with the transport of mass within t= he Earth=92s atmosphere, hydrosphere, oceans, and core also change the Eart= h=92s rotation as does mass displacement occurring within the solid Earth c= aused by earthquakes and other tectonic and non-tectonic motions like glaci= al isostatic adjustment. Measurements of the Earth=92s rotation can therefo= re be used to gain greater understanding of a wide variety of geophysical a= nd geodynamical processes. Astrometric measurements of the Earth=92s changi= ng length-of-day have been available since the middle 1600s and of the Eart= h=92s wobble since the late 1800s. The development of the space-geodetic me= asurement techniques of lunar and satellite laser ranging (LLR and SLR), ve= ry long baseline interferometry (VLBI), global navigation satellite systems= (GNSS), and Doppler orbitography and radio positioning integrated by satel= lite (DORIS) starting in the late 1960s revolutionized the accuracy, tempor= al resolution, and latency of Earth rotation measurements, a revolution tha= t continues today with the availability of new GNSS constellations and sign= als and the development of new generation LLR, SLR, and VLBI stations. This= symposium will be a forum for discussing the monitoring and modelling of t= he Earth=92s rotation and the use of Earth rotation measurements to further= our understanding of the Earth=92s complex, interacting systems. Conveners; Richard Gross Jet Propulsion Laboratory Pasadena, Calif., USA richard.gross@jpl.nasa.gov Harald Schuh Vienna University of Technology Wien, Austria harald.schuh@tuwien.ac.at Oleg Titov Geoscience Australia Canberra, Australia Oleg.Titov@ga.gov.au ...........................................................= From: ”Gross, Richard S (335N)” ******************************************************************************** |