Chinese geodetic coordinate system 2000
The basic strategies in establishing the Chinese geodetic coordinate system 2000 have been summarized, including the definition of the coordinate system, the structure of the terrestrial reference frame, the functional and stochastic models involved in the realization of the reference frame as well...
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Published in | Chinese science bulletin Vol. 54; no. 15; pp. 2714 - 2721 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Heidelberg
SP Science in China Press
01.08.2009
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Subjects | |
Online Access | Get full text |
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Summary: | The basic strategies in establishing the Chinese geodetic coordinate system 2000 have been summarized, including the definition of the coordinate system, the structure of the terrestrial reference frame, the functional and stochastic models involved in the realization of the reference frame as well as the improvements of the adjustment procedures. First, the fundamental frame of the coordinate system is composed of the permanent GPS tracking network in China which is integrated into the international GPS service stations by combined adjustment, in order to guarantee the consistence between the international terrestrial reference system and the Chinese geodetic coordinate system. Second, the extended frame of the coordinate system is composed of the unified 2000' national GPS network which is integrated by 6 nationwide GPS networks with more than 2500 stations under the controlling of the fundamental frame. Third, the densified frame is composed of national astronomical geodetic network with nearly 50 thousand stations which was updated by the combined adjustment with the 2000' national GPS network, thus the datum of the national astronomical geodetic network has been unified and the precision greatly improved. By the optimal data fusion method the influences of the datum errors, systematic errors and the outliers in the separated geodetic networks are weakened in the unified Chinese geodetic coordinate frame. The significance in application of the new geodetic coordinate system and the existing problems in the reference frame are described and analyzed. |
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Bibliography: | P22 Coordinate reference system, reference frame, geodetic control network, datum, adjustment 11-1785/N P228.4 |
ISSN: | 1001-6538 2095-9273 1861-9541 2095-9281 |
DOI: | 10.1007/s11434-009-0342-9 |