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| 利用GNSS和EGM2008模型进行跨海高程传递 | |
| 引用本文： | 吴富梅, 魏子卿. 利用GNSS和EGM2008模型进行跨海高程传递[J]. 武汉大学学报 ( 信息科学版), 2016, 41(5): 698-703. DOI: 10.13203/j.whugis20140392 |
| 作者姓名： | 吴富梅 魏子卿 |
| 作者单位： | 1.地理信息工程国家重点实验室, 陕西西安, 710054;;2.西安测绘研究所, 陕西西安, 710054 |
| 基金项目： | 国家自然科学基金(41374003,41174018)。 |
| 摘 要： | 跨海高程传递对实现海岛(礁)精确测绘具有重要意义。本文提出利用GNSS和EGM2008模型实现岛礁高程传递。在阐述基本原理的基础上,给出了利用地球引力位模型计算地面点平均重力的公式,并对这种方法获得的高程进行了误差分析,指出引力位模型误差是影响跨海高程传递精度的主要因素。利用我国GNSS水准数据、岛礁联测数据以及美国GNSS水准数据对该方法进行了验证,结果表明该方法得到的高程精度在200 km范围内优于10 cm,在跨海区域10 km范围内可达6 cm。 |
| 关 键 词： | 跨海高程传递 EGM2008 重力位 平均重力 |
| 收稿时间： | 2015-04-27 |
Height Transfer from Land to Island Based on GNSS and EGM2008 Model |
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| WU Fumei, WEI Ziqing. Height Transfer from Land to Island Based on GNSS and EGM2008 Model[J]. Geomatics and Information Science of Wuhan University, 2016, 41(5): 698-703. DOI: 10.13203/j.whugis20140392 | |
| Authors: | WU Fumei WEI Ziqing |
| Affiliation: | 1.State Key Laboratory of Geo-information Einginering, Xi'an 710054, China;;2.Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China |
| Abstract: | Height transfer from land to island is of significance for accurate surveying of islands. An approach based on GNSS and EGM2008 to height transfer is proposed. After introducing the basic principles, the formulas for calculating the mean gravity by the gravitation potential model are presented and the possible error sources on this method are analyzed. Errors generated by the gravitation potential model are the main factor that affects the accuracy of a calculated height. Tests using GNSS/leveling data for mainland and islands of China, and in US show that height accuracy better than 10 cm over a distance of 200km is achievable for land areas and 6 cm over a distance of 10 km for islands. |
| Keywords: | height transfer from land to island EGM2008 gravity potential mean gravity |
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