Results 171 to 180 of about 2,632 (195)

GEDTM30: global ensemble digital terrain model at 30 m and derived multiscale terrain variables. [PDF]

PeerJ
Ho YF, Grohmann CH, Lindsay J, Reuter HI, Parente L, Witjes M, Hengl T.   +6 more
europepmc   +1 more source

Landsat-8 OLI/SRTM and gravity characteristics of the Pan-African fracture aquifers of the north central Cameroon region (central Africa). [PDF]

Heliyon
Deffo F, Yem Mbida, Yene Atangana JQ, Koah SP, Evina Aboula YS, Ndam Njikam MM.   +5 more
europepmc   +1 more source

Evaluation of EGM2008 by comparison with other recent global gravity field models

, 2009
Förste, C., Stubenvoll, R., König, R., Raimondo, J., Flechtner, F., Barthelmes, F., Kusche, J., Dahle, C., Neumayer, H., Biancale, R., Lemoine, J., Bruinsma, S.   +11 more
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Exposure to Underestimated Channelized Melt in Antarctic Ice Shelves

Zinck AP, Lhermitte S, Wearing M, Wouters B.   +3 more
europepmc   +1 more source

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A study of the EGM2008 model of Earth's gravitational field

Journal of Navigation, 2022
AbstractThe Earth Gravity Model 2008 (EGM2008) is now some years old, and yet information on how to use it to calculate Earth's gravity remains obscure outside the field of geodesy. We describe the mathematics necessary to implement EGM2008, and use this to discuss several points of the model: its sensitivity to the number of spherical harmonics being ...
openaire   +1 more source

Is Australian Data Really Validating EGM2008, or Is EGM2008 Just in/Validating Australian Data?

2010
The tide-free release of the EGM2008 combined global geopotential model and its pre-release PGM2007A are compared with Australian land and marine gravity observations, co-located GPS-levelling on the [admittedly problematic] Australian Height Datum, astrogeodetic deflections of the vertical, and the AUSGeoid98 regional gravimetric quasigeoid model. The
S. J. Claessens, W. E. Featherstone, I. M. Anjasmara   +2 more
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Combining EGM2008 with GOCE Gravity Models

2013
The most advanced global gravity model, EGM2008, is nowadays competing with local models in terms of resolution and accuracy in the definition of the Earth gravity field. This global model, complete to spherical harmonic degree and order 2159, is however affected by several biases mainly due to datum inconsistencies and variability of the input ...
GILARDONI, MADDALENA, REGUZZONI, MIRKO, D. Sampietro, SANSO', FERNANDO   +3 more
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Geoid refinement of Songyuan irrigation area based on EGM2008 and GPS

2011 International Conference on Electronics, Communications and Control (ICECC), 2011
Local or regional geoid refinement is the primary commission for the elevation datum. Taking the GPS network of Songyuan irrigation area as an example, this paper refined the local geoid based on the quadratic surface fitting and spatial interpolation of height anomaly, and on the same algorithms of residuals between height anomaly and geoid undulation
Wu Qiong, Yang Guodong
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Stochastic modeling the vertical deflection errors of EGM2008 for INS/GNSS integration

2015 34th Chinese Control Conference (CCC), 2015
The vertical deflections (VD) error of earth gravity model, which is one of primary error sources in high-precision inertial navigation system, is usually modeled as stochastic processes. In this paper, the VD error of the Earth Gravity Model 2008 (EGM2008) are modeled as 2ed order Gauss-Markov processes. The statistical characteristics of VD error are
Dongkai Dai, Xingshu Wang, Zongsheng Huang, Jiaxing Zheng   +3 more
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Study on the Methods of Refining the Quasi-Geoid Based on EGM2008

2011 International Conference on Control, Automation and Systems Engineering (CASE), 2011
According to the existing problems that gravity data, digital elevation model are very difficult to obtain in China. The method of refining the geoid with the new "remove-restore" technique based on model geoid height calculated by EGM2008 and model geoid height, model height anomaly calculated by EGM96 are studied respectively.
Hongbin Ma, Guoqing Zhang, Qiling Hu, Liguo Wu, Dongyang Lu, Dongshun Liu   +5 more
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