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Astrometric Latitude and Time Observational Database at Shanghai Observatory

Published online by Cambridge University Press:  07 August 2017

Zheng-Xin Li
Affiliation:
Shanghai Observatory Shanghai 200030, China
You-Fen Chen
Affiliation:
Shanghai Observatory Shanghai 200030, China
Chang-Xia Qian
Affiliation:
Shanghai Observatory Shanghai 200030, China

Extract

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After the closing of Bureau International de L'Heure (BIH) and the establishment of International Earth Rotation Service (IERS) at the end of 1987. Shanghai Observatory has been the institute where the astrometric latitude and time observational data are collected and treated. During the past four years, about 75,293 measurements in latitude or time determination have been obtained by the 64 optical astrometric instruments over the world from which the five-day Earth Rotation Parameters of the 1988–1990 period have still been reduced. Twelve Quarterly Report on the optical ERP have been distributed. Since the beginning of 1991 the regular reduction of the ERP has been stopped but the collecting of the observational data is still going on in Shanghai Observatory in order to meet the requirements of the scientists who are still interested on the studies concerned with these observations. There are still 42 optical astrometric instruments taking part into the regular observations at the moment.

Type
Terrestrial Reference Frame
Copyright
Copyright © Kluwer