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Chinese geodetic coordinate system 2000

ISSN号：1001-6538
期刊名称：科学通报(英文版)
时间：0
页码：2714-2721
语言：中文
分类：P22[天文地球—大地测量学与测量工程;天文地球—测绘科学与技术] P228.4[天文地球—大地测量学与测量工程;天文地球—测绘科学与技术]
作者机构：[1]Xran Research Institute of Surveying and Mapping, Xi'an 710054, China
相关基金：Supported partly by National Natural Science Foundations of China （Grant Nos. 40774001 and 40841021） and the National High-Tech Research ＆ Development Program of China （Grant No. 2007AA 12Z331 ）The project is finished based on several large national geodetic campaigns, including ＂Data processing project of 2000＇ national GPS network＂, ＂Combined adjustment project of national astronomic geodetic network and GPS network＂, ＂＇The project of crustal movement observational network of China＂ and so on. Without the supports of high accurate observational data, we could not establish so accurately nationwide reference coordinate frame. The author is indebted to the reviewers for their helpful comments and suggestions.
相关项目：动态大地测量数据融合理论与算法研究

作者： Yang Yuanxi|

关键词：大地坐标系统, 中国, 网络跟踪, 全球定位系统, Coordinate reference system, reference frame, geodetic control network, datum, adjustment

中文摘要：

在建立中国测地学的坐标系统的基本策略 2000 被总结了包括坐标系统的定义，陆上的参考书框架的结构，涉及参考书的实现的功能、随机的模型象调整过程的改进一样装裱。首先，坐标系统的基本框架由在集成于由联合调整的国际 GPS 加油站的中国追踪网络的永久 GPS 组成，以便保证在国际陆上的参考系统和中国测地学的坐标系统之间的坚固性。第二，坐标系统的扩大框架由由 6 全国性的 GPS 综合的 GPS 网络在控制基本框架下面与超过 2500 个车站联网的统一 2000' 公民组成。第三，使增加密度的框架与被联合调整与 2000' 公民 GPS 网络更新的将近 5 万个车站由国家天体的测地学的网络组成，因此，国家天体的测地学的网络的资料被统一了，精确极大地改善了。由在分开的测地学的网络的资料错误，系统的错误和孤立点的影响在统一中国测地学的坐标被削弱的最佳的数据熔化方法装裱。在在参考框架的新测地学的坐标系统和存在问题的申请的意义被描述并且分析。

英文摘要：

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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