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| 引用本文： | 荣敏,周巍.����Ƶ��θ������о�����[J].大地测量与地球动力学,2015,35(1):58-61. |
| 作者姓名： | 荣敏 周巍 |
| 作者单位： | 1 信息工程大学地理空间信息学院， 郑州市陇海中路66号, 450052 2 西安测绘研究所， 西安市雁塔路中段1号, 710054 3 西安测绘总站， 西安市西影路36号, 710054 |
| 基金项目： | 国家自然科学基金（41174018，41304022） |
| 摘 要： | ????????????????棬??????????????????η??????????????????Σ????????????????????????????θ?????????????????κ???????????????????????б?????????????????????θ??????????θ???????????????????????С??????θ????1 000 m?????????????0??5 mGal?????????????????????????????????Χ?????????θ?????????????????????????????????????????????????????????????????????????????? |
| 关 键 词： | ??????? ?????? ??????θ??? ????? ??????? ?????? |
| 收稿时间： | 2013-11-18 |
Study on Topography Correction based on Spherical Approximation |
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| RONG Min,ZHOU Wei.Study on Topography Correction based on Spherical Approximation[J].Journal of Geodesy and Geodynamics,2015,35(1):58-61. | |
| Authors: | RONG Min ZHOU Wei |
| Institution: | 1 Institute of Geospatial Information，Information Engineering University，66 Mid-Longhai Road, Zhengzhou 450052, China 2 Xi’an Research Institute of Surveying and Mapping，1 Mid-Yanta Road, Xi’an 710054, China 3 Xi’an Division of Surveying and Mapping，36 Xiying Road, Xi’an 710054, China |
| Abstract: | Assuming the geoid as spherical approximation，the topography correction was calculated by dividing the actual topography into the Bouguer shell and the rough terrain based on the radius of the calculated point.The comparison of the local terrain correction with the Bouguer planar shows that there is difference between the rough terrain correction and the local terrain correction；the difference is small in the even area.It is more than 0.5 mGal in the areas where the elevation is higher than 1 000 m.The integral range of the spherical rough terrain correction is easy to extend，so it can present the more signals than the local terrain correction，and it is more consistant with the actual earth shape.The regular topography correction calculated with the Bouguer shell and the Bouguer planar is the same in shape，but the difference of range is very large. |
| Keywords: | Bouguer shell rough terrain local terrain correction Bouguer planar spherical approximation planar approximation |
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