TY - GEN
T1 - Status of the SIRGAS Reference Frame
T2 - IAG International Symposium on Reference Frames for Applications in Geosciences, REFAG 2022
AU - Alves Costa, Sonia M.
AU - Sánchez, Laura
AU - Piñón, Diego
AU - Tarrio Mosquera, José A.
AU - Guimarães, Gabriel
AU - Gómez, Demián D.
AU - Drewes, Hermann
AU - Mackern Oberti, María V.
AU - Antokoletz, Ezequiel D.
AU - Matos, Ana C.O.C.de
AU - Blitzkow, Denizar
AU - Silva, Alberto da
AU - Inzunza, Jesarella
AU - España, Draco
AU - Rodríguez, Oscar
AU - Rozas-Bornes, Sergio
AU - Guagni, Hernan
AU - González, Guido
AU - Paucar-Llaja, Oscar
AU - Pampillón, José M.
AU - Alvarez-Calderón, Álvaro
N1 - Publisher Copyright:
© The Author(s) 2023.
PY - 2024
Y1 - 2024
N2 - In 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 integrated regional reference frame. This frame should support the precise determination of geocentric coordinates and also provide a unified physical reference frame for gravimetry, physical heights, and a geoid. The geometric reference frame is determined by a network of about 500 continuously operating GNSS stations, which are routinely processed by ten analysis centers. The GNSS solutions from the analysis centers are used to generate weekly station positions aligned to the International Terrestrial Reference Frame (ITRF) and multi-year (cumulative) reference frame solutions. This processing is also the basis for the generation of precise tropospheric zenith path delays with an hourly sampling rate over the Americas. The reference frame for the determination of physical heights is a regional densification of the International Height Reference Frame (IHRF). Current efforts focus on the estimation and evaluation of potential values obtained from high resolution gravity field modelling, an activity tightly coupled with geoid determination. The gravity reference frame aims to be a regional densification of the International Terrestrial Gravity Reference Frame (ITGRF). Thus, SIRGAS activities are focused on evaluating the quality of existing absolute gravity stations and to identify regional gaps where additional absolute gravity stations are needed. Another main goal of SIRGAS is to promote the use of its geodetic reference frame at the national level and to support capacity building activities in the region. This paper summarizes key milestones in the establishment and maintenance of the SIRGAS reference frame and discusses current efforts and future challenges.
AB - In 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 integrated regional reference frame. This frame should support the precise determination of geocentric coordinates and also provide a unified physical reference frame for gravimetry, physical heights, and a geoid. The geometric reference frame is determined by a network of about 500 continuously operating GNSS stations, which are routinely processed by ten analysis centers. The GNSS solutions from the analysis centers are used to generate weekly station positions aligned to the International Terrestrial Reference Frame (ITRF) and multi-year (cumulative) reference frame solutions. This processing is also the basis for the generation of precise tropospheric zenith path delays with an hourly sampling rate over the Americas. The reference frame for the determination of physical heights is a regional densification of the International Height Reference Frame (IHRF). Current efforts focus on the estimation and evaluation of potential values obtained from high resolution gravity field modelling, an activity tightly coupled with geoid determination. The gravity reference frame aims to be a regional densification of the International Terrestrial Gravity Reference Frame (ITGRF). Thus, SIRGAS activities are focused on evaluating the quality of existing absolute gravity stations and to identify regional gaps where additional absolute gravity stations are needed. Another main goal of SIRGAS is to promote the use of its geodetic reference frame at the national level and to support capacity building activities in the region. This paper summarizes key milestones in the establishment and maintenance of the SIRGAS reference frame and discusses current efforts and future challenges.
KW - GNSS reference networks
KW - IHRF regional densification
KW - ITGRF regional densification
KW - ITRF regional densification
KW - Regional reference frames
KW - SIRGAS
UR - http://www.scopus.com/inward/record.url?scp=85200687395&partnerID=8YFLogxK
U2 - 10.1007/1345_2023_227
DO - 10.1007/1345_2023_227
M3 - Conference contribution
AN - SCOPUS:85200687395
SN - 9783031638541
T3 - International Association of Geodesy Symposia
SP - 153
EP - 165
BT - Gravity, Positioning and Reference Frames - Proceedings of the IAG Symposia - GGHS2022
A2 - Freymueller, Jeffrey T.
A2 - Sánchez, Laura
PB - Springer Science and Business Media Deutschland GmbH
Y2 - 17 October 2022 through 20 October 2022
ER -