ON GRAVITY REDUCTION
Li Zhiyuan 1) ; Xing Lelin 1,2) ; Xiao Liangming 3) ; and Jiang Shenghua 4)
1)School of Geodesy and Geomatics of Wuhan Universtiy, Wuhan 4300792)Institute of Seismology, CEA, Wuhan 4300713)Municipal Bureau of Land and Resources of Jingtan,Jingtan 2130004)Wuhan Geotechnical Engineering and Surveying Institute,Wuhan 430022
Abstract In this paper we have explained the physical mechanism of gravity reduction in the view of constructing the reference earth model. Through the comparison of different models, the conclusion can be drawn that the inhomogeneous of mass distribution of earth interior should be taken into account and the accuracy
of lateral density should reach 0.001 g/cm 3 when determining a cmlevel geoid.
Key words :
gravity reduction
geoid
reference earth model
lateral density variations
earth gravity field
Received: 01 January 1900
Corresponding Authors:
Li Zhiyuan
[1]
LI Mingfei,WU Junchao,QIN Chuan. Analysis and Comparison of Local Quasi Geoid Refinement Model Based on Remove-Restore Method [J]. jgg, 2020, 40(9): 952-956.
[2]
CHEN Jianhua,ZHANG Xingfu,CHEN Qiujie,SHEN Yunzhong,LI Weichao. EGMTools: Software for Gravity Field Model Estimation and Gravity Quantities Calculation [J]. jgg, 2020, 40(11): 1139-1144.
[3]
WU Xiaofeng,SONG Hao,DAI Xianpeng,FAN Wenhua,SUN Junsong. Gravity Field Variation in Maoshan Area Considering Vertical Strain Rate [J]. jgg, 2019, 39(8): 804-809.
[4]
LIWeichao,ZHANGXingfu,CHENZhiwei,CUIJiawu. Method and Accuracy Analysis of Calculating Deflection of the Vertical Basedon Geoid Mode [J]. jgg, 2019, 39(8): 843-848.
[5]
LI Jie,FAN Dongming,YOU Wei. Using GRACE to Monitor Regional Drought in China and Its Influencing Factors [J]. jgg, 2019, 39(6): 587-595.
[6]
KUANG Daizhi,FENG Jinkai,LI Wei. Research on Area Quasigeoid/Geoid Determination Based on Semi-Free Point Mass Model [J]. jgg, 2019, 39(10): 1027-1032.
[7]
DONG Mingxu,LI Jiancheng,HUA Liangchun,JIANG Weiping,YIN Haohua,AO Minsi,ZENG Xiangqiang. Hunan 2017 GNSS Gravity Quasi-Geoid Model and Its Precision Analysis [J]. jgg, 2019, 39(1): 66-71.
[8]
LI Jun,OUYANG Mingda,LI Qi. Refinement of Regional Quasi-Geoid Using the EGM2008+DTM2006.0 Model [J]. jgg, 2018, 38(3): 244-248.
[9]
HU Zhengwang,DU Jinsong,CHEN Chao. Indirect Impact of Geoid Undulation on Calculation of International Geomagnetic Reference Field [J]. jgg, 2018, 38(3): 260-262.
[10]
YOU Wei. Impact of Spherical Harmonic Analysis Methods on the Computation of GRACE Atmosphere De-Aliasing Models
[J]. jgg, 2017, 37(4): 397-402.
[11]
ZHANG Pin,SHEN Chongyang,YANG Guangliang,WANG Tongqing,CHEN zhaohui,ZHANG Shuangxi. Research on the Effect of Geoid Undulation on Gravity Reduction [J]. jgg, 2017, 37(3): 306-310.
[12]
WANG Fuhong,WANG Jun,GONG Xuewen,XIA Boyang. A Method to Determine the Optimal Degree and Order for the Earth Gravity Model in Real-Time Orbit Determination,Using Space-Borne GPS Measurements [J]. jgg, 2017, 37(2): 149-153.
[13]
DING Jian,XU Houze,ZHANG Chuanyin. An Approach to Evaluating Earth Gravitational Models (EGM) Based on Gauss-Listing Geoid Definition
[J]. jgg, 2017, 37(1): 5-10.
[14]
ZHANG Yongyi,ZHANG Xingfu,ZHOU Boyang,WEI Dehong,QIU Guangxin. The Integral Method and Accuracy Analysis of Residual Terrain Model Height Anomaly [J]. jgg, 2016, 36(9): 770-774.
[15]
ZHANG Yongyi,ZHANG Xingfu. Determination and Accuracy Analysis of Vertical Deflection [J]. jgg, 2016, 36(5): 395-.