Spectrum Management for the VGOS Spectrum management for the VLBI Global Observing System (VGOS) is an important task to keep radio frequency interference as absent as possible from observation sites. Protection can only be granted, if national and international authorities are made aware of the activities and operations at VLBI observing sites.To begin with spectrum […]
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New Designs in VGOS Front-ends in Yebes Observatory The Yebes Observatory has designed and built five VGOS compliant receivers (2-14 GHz bandwidth) for their own radio telescopes and for other European IVS partners under contract or agreement since 2015. Although such receivers are successfully working in their respective sites, we consider that there is still
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Consistency of VLBI estimates in the CONT17 campaign As part of its observing program, the International VLBI Service for Geodesy and Astrometry (IVS) arranges special observation campaigns of continuous Very Long Baseline Interferometry (VLBI) known as CONT campaigns. The last CONT campaign (CONT17) was carried out by the end of 2017 and consisted of three
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The current status of RAEGE When complete, the Red Atlántica de Estaciones Geodinámicas y Espaciales (RAEGE) will be composed of four VGOS radio-telescopes, two in Spain (Yebes and Gran Canaria) and two in Portugal (Santa María and Flores islands). The Yebes VGOS radio-telescope is fully operational and integrated in the VGOS core network. The Santa
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Polarization calibration techniques for the new-generation VLBI The calibration and analysis of polarization observations in very long baseline interferometry (VLBI) requires the use of specific algorithms that suffer from several limitations, closely related to assumptions in the data properties that may not hold in observations taken with new-generation VLBI equipment. Currently, the instantaneous bandwidth achievable
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Yebes 40 m radio telescope and the broad band Nanocosmos receivers at 7 mm and 3 mm for line surveys Context. Yebes 40 m radio telescope is the main and largest observing instrument at Yebes Observatory and is devoted to very long baseline interferometry (VLBI) and single-dish observations since 2010. It has been covering frequency
Observatory of Yebes Technological Development Center 2017-2018 Biennial Report We present the main technical developments of the Observatory of Yebes (IGN) from years 2017 and 2018 related to geodetic VLBI. P. de Vicente[1], J. A. Lopez-Pérez[1], F. Tercero-Martínez[1], J.M. Serna-Puente[1], B. Vaquero-Jiménez[1], M. Patino-Esteban[1], P. García-Carreño[1], J.D. Gallego-Puyol[1], I. Malo-Gómez[1], I. López-Fernández[1], M. Díez-González[1], J.
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VLBI20-30: a scientific roadmap for the next decade — The future of the European VLBI Network This white paper describes the science case for Very Long Baseline Interferometry (VLBI) and provides suggestions towards upgrade paths for the European VLBI Network (EVN). The EVN is a distributed long-baseline radio interferometric array, that operates at the very
Assessment of DTRF2014 and ITRF2014 by Satellite Laser Ranging Satellite laser ranging orbital solutions, using observations of satellites LAGEOS and LAGEOS-2 collected from 2000 to 2017, were used to test the performance of two reference frame realisations, ITRF2014 and DTRF2014.We compare the post-fit residuals from solutions where only initial conditions and orbit parameters were solved
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