The compatibility of DORIS with VGOS The most precise global geodetic reference frame, the International Terrestrial Reference Frame (ITRF), is based on four space geodesy techniques: Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), Global Navigation Satellite Systems (GNSS) and the Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) System. All four techniques complement …
Performance of the VGOS radio telescope with as-built feed and geometry using electromagnetic simulation This paper reports on electromagnetic simulations performed of the as-built VGOS (VLBI Global Observing System) 13.2-metre Radio Telescope at the Hartebeesthoek Radio Astronomy Observatory (HartRAO). Specifically, the telescope performance with a measured quadruple-ridge flared horn (QRFH) and with actual surfaces and …
The Yebes Observatory and the future VLBI correlator for the RAEGE network This paper describes the geodetic VLBI activities carried out at the Yebes Observatory and gives an update about the status of the RAEGE project. The design of a VLBI correlator for the RAEGE network has just started based on the experience gained with …
The Yebes Observatory and the future VLBI correlator for the RAEGE network Read More »
Description of RAEGE Yebes VGOS receiver upgrades This contribution describes the upgrades to be implemented in the RAEGE Yebes VGOS receiver.Meanwhile, the Yebes radio telescope is operating with the VGOS receiver designed for the RAEGE Santa Maria station. The goal of these upgrades is to improve the overall receiver performance in terms of sensitivity, band-pass …
Description of RAEGE Yebes VGOS receiver upgrades Read More »
Geodetic Analyses at the National Geographic Institute of Spain The National Geographic Institute of Spain (IGN Spain) develops, operates, and exploits the Spanish national geodetic networks and their associated infrastructure. This includes the permanent networks of reference GNSS (Global Navigation Satellite System) receivers, VLBI (Very Long Baseline Interferometry) telescopes, and a new SLR (Satellite Laser …
Geodetic Analyses at the National Geographic Institute of Spain Read More »
RAEGE: the Spanish-Portuguese Infrastructure of Geodetic Stations This contribution will show the current status of the joint Spanish-Portuguese infrastructure for Space Geodesy called RAEGE, which stands for Red Atlántica de Estaciones Geodinámicas y Espaciales. This infrastructure will consist of four space geodesy stations, two in Spain (Yebes and Gran Canaria) and two in Portugal (Santa …
RAEGE: the Spanish-Portuguese Infrastructure of Geodetic Stations Read More »
VLBI-based assessment of the consistency of the conventional EOP series and the terrestrial reference frames The Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG) envisages stringent accuracy goals for the International Terrestrial Reference Frame (ITRF) realization in terms of position (1 mm) and velocity (0.1 mm/year). These requirements entail that the …
RAEGE Santa Maria: Station overview The RAEGE station of Santa Maria is part of the RAEGE network (Atlantic Network of Geodynamic and Space Stations), a cooperation project established between the National Geographic Institute of Spain (IGN) and the Regional Government of the Azores. It is a unique project at a geodetic and geodynamic level, in …
Analysis of VGOS sessions: Evaluation of performance with different software VGOS (VLBI Global Observation System) is a new generation VLBI system. It has been developed since 2005 and it is based on the so-called broadband delay that uses four or more frequency bands. High data rate observations are taken by fast-slewing antennas, smaller than those …
Analysis of VGOS sessions: Evaluation of performance with different software Read More »
Geodetic data analysis of VGOS experiments Very Long Baseline Interferometry (VLBI) serves as one of the common geodetic methods to define the global reference frames and monitor Earth’s orientation variations. The technical upgrade of the VLBI method known as the VLBI Global Observing System (VGOS) includes a critical re-design of the observed frequencies from the …
