Results 191 to 200 of about 29,699 (219)

The 5 mm geoid model for Estonia computed by the least squares modified Stokes’s formula

Survey Review, 2020
Computational stages of a new high-resolution 5 mm quasigeoid model for Estonia are explained. Certain requirements for the quality and coverage of gravity data in the context of 5 mm geoid modelling were fulfilled. The present gravity data coverage over
A. Ellmann, Silja Märdla, T. Oja
semanticscholar   +1 more source

Effect of a high-resolution global crustal model on gravimetric geoid determination: a case study in a mountainous region

Studia Geophysica Et Geodaetica, 2020
Ramazan Alpay Abbak
exaly   +2 more sources

Optimizing Local Geoid Undulation Model using GPS/Levelling Measurements and Heuristic Regression Approaches

Survey Review, 2020
This study investigates to use GPS/Levelling measurements of Kuwait and four heuristic regression methods including Least Square Support Vector Regression (LSSVR), Gaussian Process Regression (GPR), Kernel Ridge Regression (KRR), and Multivariate ...
Mosbeh R. Kaloop, A. Zaki, Hamad Al-Ajami, M. Rabah   +3 more
semanticscholar   +1 more source

A comparative assessment of different interpolation algorithms for prediction of GNSS/levelling geoid surface using scattered control data

, 2020
The determination of point heights from a physical reference surface is still a challenge in geodetic and surveying applications today. Precise geoid models are used to obtain the physical point heights from the GNSS observations with height ...
S. Erol, B. Erol
semanticscholar   +1 more source

Validation of Marine Geoid Models by Utilizing Hydrodynamic Model and Shipborne GNSS Profiles

, 2020
An essential role of the FAMOS international cooperation project is to obtain new marine gravity observations over the Baltic Sea for improving gravimetric geoid modelling.
Sander Varbla, A. Ellmann, N. Delpeche‐Ellmann   +2 more
semanticscholar   +1 more source

Hybrid geoid model over peninsular Malaysia (PMHG2020) using two approaches

Studia Geophysica et Geodaetica, 2022
M. F. Pa'suya, A. H. Md Din, Ramazan Alpay Abbak, M. Hamden, N. M. Yazid, M. A. H. Aziz, Mohd Adhar Abd Samad   +6 more
semanticscholar   +1 more source

A Geoid Slope Validation Survey (2017) in the rugged terrain of Colorado, USA

Journal of Geodesy, 2021
D. Westrum, K. Ahlgren, C. Hirt, S. Guillaume   +3 more
semanticscholar   +1 more source

Impacts of Using the Rigorous Topographic Gravity Modeling Method and Lateral Density Variation Model on Topographic Reductions and Geoid Modeling: A Case Study in Colorado, USA

Surveys in geophysics, 2022
Miao Lin, Xiaopeng Li
semanticscholar   +1 more source

Collocation and FFT-based geoid estimation within the Colorado 1 cm geoid experiment

Journal of Geodesy, 2021
V. Grigoriadis, G. Vergos, R. Barzaghi, D. Carrion, Öykü Koç   +4 more
semanticscholar   +1 more source

High-resolution geoid modeling using least squares modification of Stokes and Hotine formulas in Colorado

Journal of Geodesy, 2021
M. Işık, B. Erol, S. Erol, Fatıma Feyza Sakil   +3 more
semanticscholar   +1 more source