Colorado geoid computation experiment: overview and summary

YM Wang, L Sánchez, J Ågren, J Huang, R Forsberg… - Journal of …, 2021 - Springer
The primary objective of the 1-cm geoid experiment in Colorado (USA) is to compare the
numerous geoid computation methods used by different groups around the world. This is …

[HTML][HTML] Strategy for the realisation of the International Height Reference System (IHRS)

L Sánchez, J Ågren, J Huang, YM Wang, J Mäkinen… - Journal of …, 2021 - Springer
Abstract In 2015, the International Association of Geodesy defined the International Height
Reference System (IHRS) as the conventional gravity field-related global height system. The …

A new gravimetric geoid model for Sudan using the KTH method

A Abdalla, D Fairhead - Journal of African earth sciences, 2011 - Elsevier
Sudan is characterized by vast area with flat terrains in most of the country's regions and
therefore the existence of a high-resolution geoid model is considered very important …

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

MS Işık, B Erol, S Erol, FF Sakil - Journal of geodesy, 2021 - Springer
The Colorado geoid experiment was initiated and organized as a joint study by the Joint
Working Group (JWG) 2.2. 2 (1-cm geoid experiment) of the International Association of …

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

A Ellmann, S Märdla, T Oja - Survey review, 2020 - Taylor & Francis
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 …

The topographic bias by analytical continuation in physical geodesy

LE Sjöberg - Journal of Geodesy, 2007 - Springer
This study emphasizes that the harmonic downward continuation of an external
representation of the Earth's gravity potential to sea level through the topographic masses …

Effect of the SRTM global DEM on the determination of a high-resolution geoid model: a case study in Iran

R Kiamehr, LE Sjöberg - Journal of Geodesy, 2005 - Springer
Any errors in digital elevation models (DEMs) will introduce errors directly in gravity
anomalies and geoid models when used in interpolating Bouguer gravity anomalies. Errors …

Regional gravity field refinement for (quasi-) geoid determination based on spherical radial basis functions in Colorado

Q Liu, M Schmidt, L Sánchez, M Willberg - Journal of geodesy, 2020 - Springer
This study presents a solution of the '1 cm Geoid Experiment'(Colorado Experiment) using
spherical radial basis functions (SRBFs). As the only group using SRBFs among the …

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

S Erol, B Erol - Measurement, 2021 - Elsevier
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 …

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

VN Grigoriadis, GS Vergos, R Barzaghi, D Carrion… - Journal of …, 2021 - Springer
In the frame of the International Association of Geodesy Joint Working Group 2.2. 2 “The 1
cm geoid experiment”, terrestrial and airborne gravity datasets along with GPS/leveling data …