The IAPG quasi-geoid based on Residual Least-Squares Collocation for the Colorado Experiment: ColRLSC-IAPG2019

DOI

The ColRLSC-IAPG2019 gravimetric quasi-geoid has been computed by the Institute of Astronomical and Physical Geodesy, Technical University of Munich. It has been worked out in the frame of the International Association of Geodesy Joint Working Group 2.2.2 "The 1 cm geoid experiment" and the so called "Colorado experiment". The area covered by the model is 251°E ≤ longitude ≤ 257°E, 36°N ≤ latitude ≤ 39°N with a grid spacing of 1' in both latitude and in longitude. Input data include terrestrial and airborne gravity observations, the latter being filtered for the reduction of high-frequency noise. The computation is based on the remove-compute-restore technique with XGM2018 as global geopotential and Earth2014 / ERTM2160 for the topographic gravity effects. Height anomalies are calculated by a one-step Residual Least-Squares Collocation (RLSC, Willberg et al. 2019), also including full covariance information from the high-resolution global geopotential model. The accuracy of the quasi-geoid model, when compared against GSVS17 GPS/leveling, is equal to 2.9 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.2019.001
Related Identifier https://doi.org/10.1007/s00190-020-01396-2
Related Identifier http://www.isgeoid.polimi.it/Geoid/format_specs.html
Related Identifier https://doi.org/10.1007/s00190-019-01279-1
Related Identifier https://doi.org/10.5194/essd-13-1653-2021
Related Identifier http://www.isgeoid.polimi.it/
Related Identifier https://doi.org/10.5880/isg.2019.002
Related Identifier https://www.isgeoid.polimi.it/Geoid/America/USA/reg_listCOLORADOproject.html
Metadata Access http://doidb.wdc-terra.org/oaip/oai?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:doidb.wdc-terra.org:7130
Provenance
Creator Willberg, Martin ORCID logo; Zingerle, Philipp ORCID logo; Pail, Roland ORCID logo
Publisher GFZ Data Services
Contributor Reguzzoni, Mirko; Carrion, Daniela; Rossi, Lorenzo; Willberg, Martin; ISG Staff
Publication Year 2019
Rights CC BY 4.0; http://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact Willberg, Martin (Institute of Astronomical and Physical Geodesy, Technical University of Munich, Munich, Germany); 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 ColRLSC-IAPG2019