Results 1 to 10 of about 1,043 (188)
Assessment of SIRGAS-CON tropospheric products using ERA5 and IGS [PDF]
Journal of Geodetic Science, 2022 Zenith Tropospheric Delays (ZTDs) are used to correct tropospheric effects that cause a delay in the signal measured by Global Navigation Satellite Systems (GNSS) receivers and obtain accurate measurements.
Prado Anderson +2 more
doaj +3 more sources
Status of the SIRGAS Reference Frame: Recent Developments and New Challenges [PDF]
International Association of Geodesy Symposia, 2023 AbstractIn accordance with recent developments of the International Association of Geodesy (IAG) and the policies promoted by the Subcommittee on Geodesy of the United Nations Committee of Experts on Global Geospatial Information Management (UN-GGIM), a main goal of the Geodetic Reference System for the Americas (SIRGAS) is the procurement of an ...
Laura Sanchez
exaly +3 more sources
Ingeniería, 2021 La oficialización del marco CR-SIRGAS implica la necesidad de transformar la información vinculada al marco anterior a esta nueva referencia nacional.
Jorge Moya Zamora +2 more
doaj +2 more sources
Strains arising by seismic events in the SIRGAS-CON network region
Journal of Geodetic Science, 2013 In this study, we investigate surface strains related to seismic events and their relationship with pre- and post-seismic events in Latin America, by analyzing the variation of estimated earth coordinates supplied by a geodetic network called SIRGAS-CON.
Marotta G. S. +3 more
doaj +3 more sources
Sistemas Geodésicos de Referência: Rumo ao GGRS/GGRF
Revista Brasileira de Cartografia, 2020 O estabelecimento de Sistemas Geodésicos de Referência globais integrando características geométricas e físicas é um dos desafios atuais da Geodésia, principalmente devido às demandas de diversas áreas do conhecimento de que as informações relacionadas ...
Regiane Dalazoana +1 more
doaj +1 more source
A Terrestrial Reference Frame (TRF), coordinates and velocities for South American stations: contributions to Central Andes geodynamics [PDF]
Advances in Geosciences, 2009 Satellite positioning systems allow the fixing of the location of a point on the Earth's surface with very good precision and accuracy. To do this, however, it is necessary to determine the point coordinates taking account the reference system and the ...
M. V. Mackern +3 more
doaj +1 more source
Ingeniería, 2022 Las observaciones satelitales derivadas de las constelaciones GNSS están totalmente correlacionas con el instante en la que se realizan las mediciones, sin embargo, los usuarios pueden trasladarlas a diferentes épocas siempre y cuando se cuente con los ...
Jorge Moya Zamora
doaj +1 more source
Wet tropospheric correction for satellite altimetry using SIRGAS-CON products
Journal of Geodetic Science, 2022 The wet tropospheric correction (WTC) is a required correction to satellite altimetry measurements, mainly due to the atmospheric water vapor delay. On-board microwave radiometers (MWR) provide information for WTC estimation but fail in coastal zones and
Prado Anderson +3 more
doaj +1 more source
Assessment of hybrid geoids in Chile and Spain, combining GGM and GNSS/Leveling observations
Geodesy and Geodynamics, 2021 This research presents the results for analyses done to five geopotential global models (GGM), comparing them with ground data from GNSS and leveling in heterogenic zones from the geodetic perspective, in Chile and Spain.
José Antonio Tarrío Mosquera +3 more
doaj +1 more source
SIRGAS-WGIII activities for unifying height systems in Latin America
Revista Cartográfica, 2019 Since 1997 SIRGAS (Geocentric Reference System for the Americas) is acting for establishing a unified SIRGAS Vertical Reference System (SVRS) in Latin Ameri- ca and the Caribbean.
Silvio R.C. de Freitas
doaj +1 more source