Results 31 to 40 of about 2,632 (195)

Improvement of GOCE-Based Global Geopotential Models for Gravimetric Geoid Modeling in Turkey

Geosciences, 2022
This study investigates the contribution of global geopotential models which are calculated with GOCE satellite mission data to the improvement of gravimetric geoid models in Turkey.
Mustafa Serkan Isik, Muhammed Raşit Çevikalp, Bihter Erol, Serdar Erol   +3 more
doaj   +1 more source

Evaluation of EGM2008 by means of GPS Levelling Uganda

South African Journal of Geomatics, 2014
The global gravity model EGM2008 is evaluated in various regions of Uganda to assess if it is good enough for geodetic applications. The evaluation method involves comparison of geoid heights computed from the model with those computed at irregularly distributed GPS Levelling stations.
Abeho, DR, Hipkin, R, Tulu, BB
openaire   +3 more sources

The development and evaluation of the Earth Gravitational Model 2008 (EGM2008) [PDF]

Journal of Geophysical Research: Solid Earth, 2012
EGM2008 is a spherical harmonic model of the Earth's gravitational potential, developed by a least squares combination of the ITG‐GRACE03S gravitational model and its associated error covariance matrix, with the gravitational information obtained from a global set of area‐mean free‐air gravity anomalies defined on a 5 arc‐minute equiangular grid.
Pavlis, N., Holmes, S., Kenyon, S., Factor, J.   +3 more
openaire   +3 more sources

High-resolution regional gravity field recovery from Poisson wavelets using heterogeneous observational techniques [PDF]

, 2017
2016-2017 > Academic research: refereed > Publication in refereed journal201804_a bcmaVersion of ...
A Chambodut, B Heck, BD Tapley, C Förste, C Hwang, CC Tscherning, G Fotopoulos, HC Shih, I Panet, I Prutkin, J Kusche, J Kusche, K Bentel, KR Koch, M Eshagh, M Hayn, M Holschneider, MS Filmer, N Nahavandchi, NK Pavlis, OB Andersen, OCD Omang, P Xu, P Xu, PA Odera, PC Hansen, R Forsberg, R Klees, R Klees, R Rummel, R Tenzer, RG Hipkin, T Jiang, V Lieb, WA Heiskanen, WE Featherstone, Y Chen, Y Kuroishi, Y Wang, Y Wu, Y Wu, Z Luo   +41 more
core   +1 more source

Direct regional quasi-geoid determination using EGM2008 and DEM: A case study for Mainland China and its vicinity areas

Geodesy and Geodynamics, 2015
Earth's gravity model (EGM) helps people better determine the figure of Earth, which is generally represented by a global geoid. For a considerable amount of practical applications, people use quasi-geoid to approximate the geoid, thus the quasi-geoid is
Jin Li, WenBin Shen, Xuhua Zhou
doaj   +1 more source

Vertical Deflections and Gravity Disturbances Derived from HY-2A Data

Remote Sensing, 2020
The first Chinese altimetry satellite, Haiyang-2A (HY-2A), which was launched in 2011, has provided a large amount of sea surface heights which can be used to derive marine gravity field.
Xiaoyun Wan, Richard Fiifi Annan, Shuanggen Jin, Xiaoqi Gong   +3 more
doaj   +1 more source

ANALYSIS OF THE GRAVITY MODELS IMPACT ON LEO SATELLITE ORBIT PREDICTION [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Non-spherical gravity plays a crucial role in the LEO satellite orbit determination and prediction. In recent years, several new gravity models have been proposed with more comprehensive ground and space-borne data.
Y. Zhuang, L. Wang
doaj   +1 more source

Evaluation of ultra-high degree gravity field models: a case study of Eastern Tibetan Plateau and Sichuan Province

Terrestrial, Atmospheric and Oceanic Sciences, 2022
This study validates the ultra-high-degree gravity field models in terms of the internal error estimate and the external precision. Internal error estimate is evaluated by geoid error degree variance and cumulative geoid height errors.
Huaqing Yuan, Xiaoyun Wan, Yunlong Wu, Yi Peng, Zehua Guo   +4 more
doaj   +1 more source

Conservative evaluation of the uncertainty in the LAGEOS-LAGEOS II Lense-Thirring test

, 2009
We deal with the test of the general relativistic gravitomagnetic Lense-Thirring effect currently ongoing in the Earth's gravitational field with the combined nodes \Omega of the laser-ranged geodetic satellites LAGEOS and LAGEOS II.
A. Milani, B. D. Tapley, B. Mashhoon, C. W. F. Everitt, C. W. F. Everitt, Ch. Reigber, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, E.C. Pavlis, F. J. Lerch, F. Vespe, H. Pfister, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, J. C. Ries, J. C. Ries, J. C. Ries, J. Lense, L. Cugusi, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Schiff, M. L. Ruggiero, M. R. Pearlman, P. Inversi, R. A. Patten Van, R. A. Patten Van, W. M. Kaula   +47 more
core   +1 more source

Improved Geoid Determination Based on the Shallow-Layer Method: A Case Study Using EGM08 and CRUST2.0 in the Xinjiang and Tibetan Regions

Terrestrial, Atmospheric and Oceanic Sciences, 2013
In this paper we present the concepts and realization of the shallow-layer Shen geoid determination method, which is quite different from the classical geoid modeling methods (Stokes¡¦ method, Molodenskii¡¦s method, etc.), for determining the global or ...
WenBin Shen Jiancheng Han
doaj   +1 more source