多种重力场数据混叠的中国海岸带海域重力似大地水准面精化.docx

 PAGE \* MERGEFORMAT 8 多种重力场数据混叠的中国海岸带海域重力似大地水准面精化?国家自然科学基金，国家科技支撑计划课题（2012BAB16B01） 第一作者: 郭春喜，男，，2008年获得武汉大学大地测量学与工程测量博士学位，主要从事大地测量数据处理与地球重力场研究；通讯作者：章传银，男，出生于1968年12月，主要从事大地测量与地球重力场研究， HYPERLINK mailto:zhangchy@ zhangchy@ 郭春喜1,章传银2,王斌1,柯宝贵2,王夏莉1,蒋涛2,范宏涛1,王伟2 1国家测绘地理信息局大地测量数据中心，西安 710054 2中国测绘科学研究院，北京100830 摘要：本文采用统一的地球外部（含地面）任意类型重力场参数的精密归算方案，对中国沿海地区陆地重力、海岸带航空重力、海域船测重力及卫星测高等多种重力场数据进行了精细化处理，进而以大地水准面为边界面，按不同来源重力数据的可靠性进行配权，采用加权最小二乘谱分析方法实现了陆海重力场的数据集成，求得中国海岸带海域陆海统一的2.5′×2.5′地面扰动重力数值模型，最后，在Stokes框架下，采用严密的球近似算法，计算了中国海岸带海域陆海统一的2.5′×2.5′重力似大地水准面数值模型。多种方案的检测分析结果显示，2.5′×2.5′地面扰动重力精度达到毫伽级，重力似大地水准面精度达到厘米级。 关键词：多种数据混叠；海岸带；重力似大地水准面；Stokes框架 Refinement Gravimetric Quasi-geoid Based on Various Gravity Data Hybrid in Chinese Coastal Zone GUO Chun-Xi1,ZHANG Chuan-Yin2,WANG Bin1,KE Bao-Ggui2,WANG Xia-Li1,JIANG Tao2,FAN Hong-Tao1 ,WANG Wei2 ,MA Xin-Ying1,LI Wei2 1 Geodetic Data Processing Center, State Bureau of Surveying and Mapping, Xi’an 710054, China 2 Chinese Academy of Surveying and Mapping, Beijing 100830, China Abstract: In this paper, the off-shore terrestrial gravity data, coastal zone airborne?gravity data , Marine ship gravity data, satellite altimetry gravity data and so on ,have been processed based on an unified accurate reduction scheme, which were?suited to any gravity field parameters outside or including the ground of the earth. the various gravity data took geoid as a boundary surface and were assigned to different weight according to their quality reliability. An weighted least square spectrum analysis method was adopted to  HYPERLINK /search?q=implementedkeyfrom=dict.typospc=implementedle=eng implemented?land and ocean gravity data integration. Then a gravity disturbance numerical model was obtained, with 2.5 minutes spatial resolution, in region of chinese coastal zone. Under the stokes frame the gravimetric Marine Quasi-geoid, which spatial resolution was also 2.5mimutes, was calculated through the rigorous spherical approximation. Several t