Advancing Solar System Dynamics Investigations with Calibrated Precision Doppler Tracking Planetary gravitation and solar system dynamics investigations rely on precision Doppler tracking of spacecraft. In the most sensitive Doppler measurements carried out by the NASA/JPL Deep Space Network (Allan deviations ~3×10-15 at 1000 s integration time), the unmodeled time-dependent motion of the large (34 m) […]
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
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Satellite Laser Ranging Satellite Laser Ranging (SLR) is a space geodetic technique that consists in the measurement of the time-of-flight of laser photons emitted from ground stations to retroreflectors onboard satellites in orbit. Accurate and precise observations, at the level of a few millimetres, of the instantaneous ranges to the targets tracked are thus acquired,
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The Atlantic Network of Geodynamic and Space Stations (RAEGE) This paper shows the current status of the Red Atlántica de Estaciones Geodinámicas y Espaciales (RAEGE), a joint Spanish-Portuguese infrastructure of geodetic stations. When complete, it will be composed of four VGOS (VLBI Global Observing System) radio-telescopes, two in Spain (Yebes and Gran Canaria) and two
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A Tri-Band Cooled Receiver for Geodetic VLBI This paper shows a simultaneous tri-band (S: 2.2–2.7 GHz, X: 7.5–9 GHz and Ka: 28–33 GHz) low-noise cryogenic receiver for geodetic Very Long Baseline Interferometry (geo-VLBI) which has been developed at Yebes Observatory laboratories in Spain. A special feature is that the whole receiver front-end is fully coolable
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A geodetic VLBI experiment with the dissemination of a common clock via coherent optical fibre link Ricci, R.[1]; Negusini, M.[1]; Perini, F.[1]; Calonico, D.[1]; Clivati, C.[1]; Mura, A.[1]; Levi, F.[1]; Siciliani-de-Cumis, M.[1]; Santamaria-AmatoRoma, M.[1]; Bortolotti, C.[1]; Maccaferri, G.[1]; Stagni, M.[1]; Haas, R.[1]; Tercero, B.[1] Type Presentation Event 25th EVGA Working Meeting, 2021 [1] Yebes Observatory,
Preamplifier module for VGOS and legacy S/X observations compatibility in the presence of RFI signals Lopez-Perez, J. A.[1]; Patino-Esteban, M.[1]; Garcia-Carreno, P.[1]; Serna-Puente, J. M.[1]; Bautista-Duran, M.[1]; Rivera-Lavado[1] Type Presentation Event 25th EVGA Working Meeting, 2021 [1] Yebes Observatory, Instituto Geográfico Nacional, Guadalajara, España Voltar para a página Publicações
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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