The gravimetric geoid of São Paulo State based on Fast Fourier Transformation with modified Stokes kernel: GEOID-SP-2014-FFT

DOI

This gravimetric geoid model of São Paulo State, Brazil, has been computed by remove-restore technique using Stokes integration through Fast Fourier Transform (FFT) with spheroidal Molodenskii-Meissl kernel modification. The reference geopotential model is GO_CONS_GCF_2_DIR_R5 up to degree and order 200. The SAM3s_v2 DTM has been used for the computation of terrain correction and other topographic and atmospheric effects. The mean free-air gravity anomaly (FA) in a 5'x5' grid over continent has been derived from the complete Bouguer anomalies (FA over the ocean has been obtained from the DTU10 satellite gravity model). Geoidal heights, referred to the GRS80 ellipsoid, have been computed on a grid of 5'x5' covering the area from 17°S to 28°S in latitude and from 56°W to 42°W in longitude. The resulting model has been verified by comparing them with 363 GPS/leveling points distributed all over the area, showing differences with a root mean square of 0.22 m.

The 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.2014.002
Related Identifier https://doi.org/10.1590/s1982-21702014000100012
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.2014.003
Metadata Access http://doidb.wdc-terra.org/oaip/oai?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:doidb.wdc-terra.org:7361
Provenance
Creator Guimarães, Gabriel do Nascimento ORCID logo; Blitzkow, Denizar ORCID logo; Barzaghi, Riccardo ORCID logo; de Matos, Ana Cristina Oliveira Cancoro (ORCID: 0000-0002-0040-588X)
Publisher GFZ Data Services
Contributor Reguzzoni, Mirko; Carrion, Daniela; Rossi, Lorenzo; Guimarães, Gabriel do Nascimento; ISG Staff
Publication Year 2014
Rights CC BY 4.0; http://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact Guimarães, Gabriel do Nascimento (Instituto de Geografia, Universidade Federal de Uberlândia (UFU), Uberlândia, Brazil); ISG Staff (International Service for the Geoid (ISG))
Representation
Resource Type Dataset
Version 1.0
Discipline Geodesy, Geoinformatics and Remote Sensing
Spatial Coverage (-55.958W, -27.958S, -42.042E, -17.042N); Gravimetric geoid model GEOID-SP-2014-FFT