| 北美国家高程基准面及重力异常计算方法的重大修改 |
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| 引用本文： | 曾华霖.北美国家高程基准面及重力异常计算方法的重大修改[J].物探与化探,2008,32(1):8-12. |
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| 作者姓名： | 曾华霖 |
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| 作者单位： | 中国地质大学,地下信息探测技术与仪器教育部重点实验室,地球物理与信息技术学院,北京,100083 |
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| 摘 要： | 北美以及加拿大、墨西哥和美国的重力数据库进行了两项重大修改:采用国际上接受的地球椭球面,而不是习惯使用的大地水准面或海平面作为重力测点的高程基准面;改进重力异常的计算方法。对北美国家现在使用的高度校正、布格校正、地形(海洋深度)校正、间接影响校正、曲率校正、大气校正,以及均衡补偿校正,均做了不同程度的修改。
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| 关 键 词： | 高程基准面 重力异常 计算方法 北美 |
| 文章编号： | 1000-8918（2008）01-0008-05 |
| 收稿时间： | 2007-09-06 |
| 修稿时间： | 2007年9月6日 |
STRIKING REVISIONS OF VERTICAL DATUM AND PROCEDURES FOR CALCULATING GRAVITY ANOMALIES IN NORTH AMERICA |
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| ZENG Hua-lin.STRIKING REVISIONS OF VERTICAL DATUM AND PROCEDURES FOR CALCULATING GRAVITY ANOMALIES IN NORTH AMERICA[J].Geophysical and Geochemical Exploration,2008,32(1):8-12. |
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| Authors: | ZENG Hua-lin |
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| Institution: | Geo-detection Laboratory, Ministry of Education, School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China |
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| Abstract: | The North America gravity database as well as database from Canada, Mexico and the United States are being revised, and the revision includes the following two items: the use of the internationally accepted terrestrial ellipsoid for the height datum of gravity stations rather than the conventionally used geoid or sea level, and the modification of procedures for calculating gravity anomalies, including corrections for theoretical gravity, atmospheric effect, height effect, Bouguer effect, indirect effect, terrain and bathymetry effect, and isostatic compensation effect. |
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| Keywords: | vertical datum gravity anomaly calculation method North America |
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