摘要
卫星重力计划实施以来,世界各国测量研究机构基于卫星重力数据、卫星测高、船测重力、航空重力数据和地面重力数据研制了诸多高精度、高分辨率的地球重力场模型。然而,由于极区缺少相应的测量重力数据,模型精度通常较低。本文针对卫星重力测量确定的地球重力场模型精度的不确定性问题,对比分析了国际上发布的几种较新的重力场模型,分析了其在南极和北极地区反演的重力异常的准确性。结果表明,e模型虽然采用了部分极地实测重力数据,但在同阶次的情况下,其在极区的精度也并不是最高的。SGG-UGM-1模型的内符合精度在高阶时最高,在极地区域与地面重力数据误差最小。
Since the implementation of the satellite gravity program,many high-precision and high-resolution earth gravity field models have been developed by surveying and research institutions around the world based on satellite gravity data,satellite altimetry,ship gravity,aviation gravity data and ground gravity data.However,in polar regions,the accuracy of the model is generally low due to the lack of corresponding measured gravity data.Aiming at the uncertainty of the accuracy of the gravity field model determined by satellite gravimetry,this paper compares and analyses several new gravity field models published internationally,and analyses the accuracy of gravity anomaly determined by satellite gravimetry in the polar regions.The results show that although GO_CONS_GCF_2_TIM_R6e model uses partial polar gravity data,its accuracy in polar region is not the highest under the same order.The internal coincidence accuracy of SGG-UGM-1 model is the highest at high order,and the error of gravity data in polar region and ground is the smallest.
作者
郭灿文
徐菁
马永
樊妙
GUO Canwen;XU Jing;MA Yong;FAN Miao(National Marine Data and Information Service,Tianjin 300171,China;Research Institute of Physical and Chemical Engineering of Nuclear Industry,Tianjin 300180,China)
出处
《测绘与空间地理信息》
2020年第8期12-15,共4页
Geomatics & Spatial Information Technology
基金
国家重点研发计划课题——综合航空地球物理数据处理、解释和管理软件平台研发(2017YFC0602204)资助。
