| 我国现代高程测定关键技术若干问题的研究及进展 |
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| 引用本文： | 李建成.我国现代高程测定关键技术若干问题的研究及进展[J].武汉大学学报(信息科学版),2007,32(11):980-987. |
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| 作者姓名： | 李建成 |
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| 作者单位： | 武汉大学测绘学院,武汉市珞喻路129号,430079;武汉大学地球空间环境与大地测量教育部重点实验室,武汉市珞喻路129号,430079 |
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| 基金项目： | 国家自然科学基金;国家高技术研究发展计划(863计划) |
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| 摘 要： | 阐述了大地水准面在大地测量学及相关地球科学中的科学意义、作用及其应用,提出了利用GPS技术结合高精度似大地水准面代替我国高程测定的思路,分析了目前地球重力场长波、中波和短波在计算cm级大地水准面中具备的条件,论述了确定1 cm精度城市和5 cm省级似大地水准面的若干关键技术问题及其必要性和可行性,提出了我国cm级大地水准面确定中需解决的主要理论问题和若干关键技术,评述了我国局部大地水准面的主要进展和取得的成果。
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| 关 键 词： | 地球重力场 大地水准面 高程测定 |
| 文章编号： | 1671-8860（2007）11-0980-08 |
| 修稿时间： | 2007-08-24 |
Study and Progress in Theories and Crucial Techniques of Modern Height Measurement in China |
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| LI Jiancheng.Study and Progress in Theories and Crucial Techniques of Modern Height Measurement in China[J].Geomatics and Information Science of Wuhan University,2007,32(11):980-987. |
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| Authors: | LI Jiancheng |
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| Institution: | 1. School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China; 2. Key Laboratory of Geospace Enviroment and Geodesy, Ministry of Education, Wuhan University 129 Luoyu Road, Wuhan 430079, China |
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| Abstract: | The scientific significance,function and application of geoid in geodesy and related geoscience are elaborated.The conception of combining GPS with high precision geoid to replace leveling in China is brought forward.The prerequisites of long wave,medium wave and short wave of Earth's gravity field to compute geoid with cm-level accuracy are analyzed.Some crucial techniques,necessity and feasibility of determining city geoid with 1 cm and provincial geiod with 5 cm are discussed.The main theoretical problems and mainly crucial techniques to be solved in cm-level geoid determination in China are presented as well.And the main progress and achievement of regional geoid determination in China are reviewed. |
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| Keywords: | Earth's gravity field geoid height measurement |
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