2026-08-12T08:38:15Zhttp://doidb.wdc-terra.org/oaip/oai

oai:doidb.wdc-terra.org:73622026-06-10T10:17:28ZDOIDBDOIDB.ISG

false4DOIDB.ISG 10.5880/isg.2014.003 Guimarães, Gabriel do Nascimento Gabriel do Nascimento Guimarães 0000-0003-4380-4650 Instituto de Geografia, Universidade Federal de Uberlândia (UFU), Uberlândia, Brazil Blitzkow, Denizar Denizar Blitzkow 0000-0003-1412-3063 Universidade de São Paulo, São Paulo, Brazil; Centro de Estudos de Geodesia (CENEGEO), São Paulo, Brazil Barzaghi, Riccardo Riccardo Barzaghi 0000-0002-2847-3841 Department of Civil and Environmental Engineering (DICA), Politecnico di Milano, Italy de Matos, Ana Cristina Oliveira Cancoro Ana Cristina Oliveira Cancoro de Matos 0000-0002-0040-588X Centro de Estudos de Geodesia (CENEGEO), São Paulo, Brazil GFZ Data Services 2014 Geodesy Geoid model ISG Least Squares Collocation São Paulo State Brazil EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY Reguzzoni, Mirko Mirko Reguzzoni 0000-0002-4027-9347 International Service for the Geoid (ISG), Politecnico di Milano, Italy Carrion, Daniela Daniela Carrion 0000-0003-1262-9394 International Service for the Geoid (ISG), Politecnico di Milano, Italy Rossi, Lorenzo Lorenzo Rossi 0000-0001-6050-1972 International Service for the Geoid (ISG), Politecnico di Milano, Italy Guimarães, Gabriel do Nascimento Instituto de Geografia, Universidade Federal de Uberlândia (UFU), Uberlândia, Brazil ISG Staff International Service for the Geoid (ISG) 2014 Dataset 10.1590/s1982-21702014000100012 10.5194/essd-13-1653-2021 http://www.isgeoid.polimi.it/ 10.5880/isg.2014.002 1.0 CC BY 4.0 This gravimetric geoid model of São Paulo State, Brazil, has been computed by remove-restore technique using Least Squares Collocation (LSC). The reference geopotential model is GO_CONS_GCF_2_DIR_R3 up to degree and order 150. 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 0.20 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).
Gravimetric geoid model GEOID-SP-2014-LSC -55.9583 -42.0417 -27.9583 -17.0417