Results 251 to 260 of about 269,909 (321)

Modeling of vertical gravity gradient by normal gravity field and digital terrain models

Journal of Geodesy, 2022
Vertical gravity gradient, as a change of gravity with the change in height, is a significant physical quantity used in many geodetic and geophysical modeling applications. In this research, we used a normal gravity field and digital terrain models to model the vertical gravity gradient without using other sources of information such as global ...
Oleg Odalovic, Klemen Medved, Sofija Naod   +2 more
openaire   +3 more sources

Full gravity gradient tensors from vertical gravity by cosine transform

Applied Geophysics, 2012
We present a method to calculate the full gravity gradient tensors from pre-existing vertical gravity data using the cosine transform technique and discuss the calculated tensor accuracy when the gravity anomalies are contaminated by noise. Gravity gradient tensors computation on 2D infinite horizontal cylinder and 3D “Y” type dyke models show that the
Fu-Yu Jiang, Yan Huang, Ke Yan
openaire   +2 more sources

Gravity Gradient Tensor Determined from Vertical Gravity Measurements

61st EAGE Conference and Exhibition, 1999
A technique has been developed to determine the gravity gradient tensor from preexisting vertical component of gravity (g,) using Fourier transform techniques.
K. Mickus, J. Hinojosa
openaire   +2 more sources

Vertical resolution: Gravity versus vertical gravity gradient

The Leading Edge, 2001
Can gravity really detect a 200-m throw fault at a depth of 3000 m? Such a question may be frequently asked when we interpret gravity data. At present, with gravity gradiometry available and the exploration activity in areas such as the Gulf of Mexico, another parallel question is raised.
Xiong Li
openaire   +2 more sources

Sensitivity analysis of gravity anomalies and vertical gravity gradient data for bathymetry inversion

Marine Geophysical Research, 2018
Bathymetry is the measurement of the water depth similar to underwater topography. Gravity anomaly and vertical gravity gradient are important data used to inverse bathymetry. In this study, we investigate the sensitivities of the gravity anomalies and vertical gravity gradient data to bathymetry inversion.
Xiaoyun Wan, Jiangjun Ran, Shuanggen Jin
openaire   +2 more sources

Accurate Approximation of Vertical Gravity Gradient Within the Earth’s External Gravity Field

2015
Vertical gravity gradient plays an important role in the research of the Earth’s gravity field. However, the measurement of the vertical gravity gradient is a hard work. With the fast development of the Earth’s gravity field modeling technique, it is possible to accurately approximate the vertical gravity gradient with the aid of the gravity field ...
Dongming Zhao, Shanshan Li, Huan Bao, Qingbin Wang   +3 more
openaire   +2 more sources

Repeated Measurements of Vertical Gravity Gradient

1993
Four cycles of detailed determinations of the vertical gravity gradient have been carried out during 1991–1992 at fundamental gravity station “Lomonosov” near St. Petersburg, Russia, using one quartz Sodin gravimeter with resulting precision (after 20–30 repetitions) of about 1 µGal.
A. Kopaev, M. Shteyman, L. Vitushkin
openaire   +2 more sources

Measurements of vertical gravity gradient

Bulletin géodésique, 1971
By modem gravity meters it is possible to m_r~_~Jre gravity differences with an accuracy higher than + 0,01 mgal ; even  0.001 regal and better becomes feasible under special conditions. Thus, more reliable information about the vertical gravity gradient is attainable by portable and relatively simple instrumentation.
E. Groten
openaire   +2 more sources

THE VERTICAL GRAVITY GRADIENT IN BOREHOLE EXPLORATION

GEOPHYSICS, 1963
In past years vertical gravity‐gradient observations have been repeatedly suggested for the determination of in‐situ densities of rock formations penetrated by a borehole (Smith, 1950; Hammer, 1963). However, calculations made for a point mass to one side of a borehole show that the first vertical derivative of gravity, g, is influenced by this mass ...
S. Thyssen-Bornemisza
openaire   +2 more sources

On performance of vertical gravity gradient determined from CryoSat-2 altimeter data over Arabian Sea

Geophysical Journal International, 2023
High-precision and high-resolution satellite altimetry data from CryoSat-2 are widely utilized for marine gravity inversion. The vertical gravity gradient is a crucial parameter of the Earth's gravity field.
Ruichen Zhou, Xin Liu, Z. Li, Yu Sun, Jiajia Yuan, J. Guo, A. Ardalan   +6 more
semanticscholar   +1 more source