The ITU quasi-geoid based on Least Squares modification of Stokes integral with additive corrections for the Colorado Experiment: ColLSMSA2020

DOI

The ColLSMSA2020 gravimetric quasi-geoid model has been computed by the Gravity Research Group of the Department of Geomatics Engineering, Istanbul Technical University (ITU-GRG). The model has been computed in the frame of the International Association of Geodesy Joint Working Group 2.2.2 "The 1 cm geoid experiment". The area covered by the model is 109°W ≤ longitude ≤ 103°W, 36°N ≤ latitude ≤ 39°N with a grid spacing of 2' in both latitude and in longitude.

The computation is based on the Least Squares Modification of Stokes Integral with Additive Corrections (LSMSA). In the computation, the XGM2016 global geopotential model up to degree/order 719 is used. Integration radius for Stokes integral is chosen as 0.5°. The error degree variance of gravity anomalies is constructed using a bandlimited white noise model where standard deviation is taken as 3 mGal. The input gravity data include terrestrial and airborne data combined using 3D Least-Squares Collocation (LSC). The accuracy of the quasi-geoid model over GSVS17 GPS/leveling is 2.7 cm.

The quasi-geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage.

The International Service for the Geoid (ISG) was founded in 1992 (as International Geoid Service - IGeS) and it is now an official service of the International Association of Geodesy (IAG), under the umbrella of the International Gravity Field Service (IGFS). The main activities of ISG consist in collecting, analysing and redistributing local and regional geoid models, as well as organizing international schools on the geoid determination (Reguzzoni et al., 2021).

Identifier
DOI https://doi.org/10.5880/isg.2020.005
Related Identifier https://doi.org/10.1007/s00190-021-01501-z
Related Identifier http://www.isgeoid.polimi.it/Geoid/format_specs.html
Related Identifier https://doi.org/10.1007/s00190-020-01434-z
Related Identifier http://www.isgeoid.polimi.it/
Related Identifier https://doi.org/10.5194/essd-13-1653-2021
Related Identifier https://doi.org/10.5880/isg.2021.001
Related Identifier https://doi.org/10.5880/isg.2021.002
Related Identifier https://doi.org/10.5880/isg.2020.006
Metadata Access http://doidb.wdc-terra.org/oaip/oai?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:doidb.wdc-terra.org:7073
Provenance
Creator Işık, Mustafa Serkan ORCID logo; Erol, Bihter (ORCID: 0000-0003-0854-788X); Erol, Serdar ORCID logo; Sakil, Fatıma Feyza ORCID logo
Publisher GFZ Data Services
Contributor Reguzzoni, Mirko; Carrion, Daniela; Rossi, Lorenzo; Işık, Mustafa Serkan; ISG Staff
Publication Year 2020
Rights CC BY 4.0; http://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact Işık, Mustafa Serkan (Geomatics Engineering Department, Istanbul Technical University, Istanbul, Turkey); ISG Staff (International Service for the Geoid (ISG))
Representation
Resource Type Dataset
Version 1.0
Discipline Geodesy, Geoinformatics and Remote Sensing
Spatial Coverage (-109.000W, 36.000S, -103.000E, 39.000N); Gravimetric quasi-geoid model ColLSMSA2020