| 关于我国1957年旧重力基本网的精度与系统转换 |
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| 引用本文： | 江志恒.关于我国1957年旧重力基本网的精度与系统转换[J].测绘科学,1989(1). |
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| 作者姓名： | 江志恒 |
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| 作者单位： | 国家测绘局研究所 |
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| 摘 要： | 简述了原国家重力基本网(57网)的历史和技术要点,详细地分析了57网的各类误差和产生原因,提出了新、旧系统转换的方法。本文研究表明,57网基本点相对观测的实际精度约为±0.06mgal,仪器平均值误差为1.6×10~(-4)。基本点重力值含-13.56mgal的基准误差和1.9×10~(-4)的尺度差,并含有±0.1～0.2mgal的非线性系统误差。对基本点实行新、旧系统转换误差为±0.05mgal,基本不损失其观测精度。
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ON THE ACCURACY AND SYSTEM TRANSFORNATION OF THE PREVIOUS CHINA GRAVITY BASIC NET 1957 |
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| Jiang Zhiheng Research Institute of Surveying and Mapping Beitaipinlu ,Beijing,P.R.China.ON THE ACCURACY AND SYSTEM TRANSFORNATION OF THE PREVIOUS CHINA GRAVITY BASIC NET 1957[J].Science of Surveying and Mapping,1989(1). |
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| Authors: | Jiang Zhiheng Research Institute of Surveying and Mapping Beitaipinlu Beijing PRChina |
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| Institution: | Jiang Zhiheng Research Institute of Surveying and Mapping Beitaipinlu 16,Beijing,P.R.China |
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| Abstract: | After a brief review of history and technical keys of the previous
China Gravity Basic Net(Net57),the author discusses the various errors
in Net57 and their sources,also the mathematical model for transformation
between the previous and present systems.The result shows that,the rela-
tive measurement accuracy is about±0.06 mgal with an error of.00016
in scale of instruments used.A basic error of-13.56 mgal and a scale
error of.00019 as well as unlinear error of 0.1-0.2 mgal were found
in the Net57 gravity values.It is possible to transform the previous
Net57 into the new system with an accuracy of±0.05 mgal which can he
ignored compared to the measurement errors. |
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| Keywords: | CHINA GRAVITY BASIC NET(NET57 NET85) BASIC ERROR SCALE ERROR |
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