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: http://www.ipa.nw.ru/PAGE/FUNDAMENTAL/GEO/eop_serv/eopserve.htm
Дата изменения: Unknown Дата индексирования: Sun Apr 10 02:27:50 2016 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п п п п п р п р п р п р п р п р п р п р п р п р п р п р п р п р п п п п |
| IAA EOP Service Russian page |
| General Information |
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Earth Orientation Parameters (EOP) Service is operated by the Laboratory of Space Geodesy and Earth Rotation (LSGER) of the Institute of Applied Astronomy of the Russian Academy of Sciences (IAA). The main milestones of the IAA EOP Service history are:
| March 1995 | First IAA SLR EOP submission to IERS Annual Report | |
| April 1995 | Beginning of operational processing of SLR observations | |
| May 1995 | First appearance of IAA SLR EOP in the IERS Bulletin B | |
| July 1995 | First appearance of IAA SLR EOP in the IERS Bulletin A | |
| February 1996 | Beginning of operational processing of VLBI observations | |
| March 1996 | First IAA VLBI EOP submission to IERS Annual Report | |
| First appearance of IAA VLBI EOP in the IERS Bulletin B | ||
| August 1999 | First appearance of IAA VLBI EOP in the IERS Bulletin A | |
| October 2001 | Beginning of operational processing of GPS observations | |
| January 2002 | First appearance of IAA GPS EOP in the IERS Bulletin B | |
| March 2002 | First IAA GPS EOP submission to IERS Annual Report | |
| April 2004 | Beginning of regular prediction of observed corrections to the IAU2000A model | |
| August 2005 | First issue of the weekly Bulletin |
Now both operative and final EOP series have being computed. The IAA EOP series are routinely submitted to the IERS and IVS and are included in their operative and final combinations. Everyday operative processing of SLR, GPS and VLBI Intensive observations is fully automated.
CDDIS (NASA Goddard Space Flight Center, Greenbelt, MD, USA) is used as primary data center for VLBI, SLR and GPS observations, and EDC (Deutsches Geodätisches Forschungsinstitut, Munich, Germany) is used as supplement center for operational SLR data.
We use several program packages for analysis mostly developed at the IAA: GROSS for processing of the SLR observations and analysis of EOP and coordinates time series, OCCAM/GROSS for computation of EOP, station coordinates, and troposphere parameters time series from the VLBI observations, GRAPE for processing of GPS observations.
Special software has been developed for automatic data and results exchange inside IAA and between IAA and outer services and data centers and support of data bases related to the IAA EOP Service activity.
Software used for analysis includes both MS DOS/Windows (data analysis, internal data exchange, data storage) and Unix (data exchange with outer centers, web and ftp servers) components.
| Products |
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Estimates of the full set of EOP (Earth pole coordinates Xp and Yp with rates Xp_rate and Yp_rate, Universal Time UT1-UTC or TAI-UT1, length of day LOD, celestial pole coordinates dPsi, dEps or dXc, dYc) are computed using observations collected from global VLBI, SLR and GPS networks. SLR series is updated daily, other series are updated 3-4 times per week. Accuracy of EOP is about 0.10-0.25 mas depending on technique.
| Related links |
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| Contact: Dr. Iskander Gayazov, gayazov@ipa.nw.ru |
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