Results 41 to 50 of about 21,511,845 (71)
VGOS Wideband Reception and Emerging Competitor Occupations of the VLBI Spectrum [PDF]
, 2019 The VGOS wideband receivers cover a spectrum from 2 to 14 GHz. In this range, many frequencies are allocated to other services. VGOS provides up to four 1 GHz wide sub-bands, which can be tuned to frequencies where detrimental radio frequency ...
Winkel, Benjamin +7 more
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Measuring Focal Length Variations of VGOS Telescopes Using Unmanned Aerial Systems [PDF]
, 2019 VLBI radio telescopes are large technical\ua0facilities whose structures are aected by several\ua0deformation patterns. In particular, temperature- and\ua0gravity-dependent deformations bias the estimated\ua0global telescope position and, therefore, if ...
Lösler, Michael, +7 more
core +1 more source
Scheduling für VGOS Zwillingsteleskope [PDF]
, 2016 The technique of Very Long Baseline Interferometry (VLBI) allows the estimation of all five Earth Orientation Parameters (EOP), the International Celestial Reference Frame (ICRF) and it is a primary contributor to the International Terrestrial Reference ...
Gnilsen, Paul
core +1 more source
High-fidelity wideband VLBI polarimetry
, 2023 We will discuss about wideband and multiband VLBI observations taken with linear-polarization feeds (the simplest hardware polarimetry for wide bands), and how these observations can be calibrated and fringe-fitted with special software, in order to ...
Martí-Vidal, Iván
core +1 more source
Optimal Placement of VGOS Telescope in India: Simulation Insights for 24-Hour and 1-Hour VLBI Sessions [PDF]
Geodetic applications depend on the precise transformation between terrestrial and celestial reference frames, which are tied by the Earth Orientation Parameters (EOP). Very Long Baseline Interferometry (VLBI) is the only space geodetic technique capable
Böhm, Johannes; orcid: +7 more
core +1 more source
New Observing Modes for the DBBC3 [Elektronisk resurs]
, 2019 The DBBC3 was further enhanced by introducing new modes. Three different firmwares have recently been implemented for observing: Direct Sampling Conversion (DSC), arbitrary selection of bands (OCT), and Digital Down Conversion (DDC).
Dornbusch, Sven, +7 more
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Statistical Analysis of Five Years of VGOS Observations with Geophysical Loading Corrections
The VLBI Global Observing System (VGOS) represents a comprehensive overhaul of the VLBI system, under development since 2005. This system incorporates a broadband spectrum (2-14 GHz) and rapid, compact antennas. The redesign aims to enhance observational
Singh, Shivangi +4 more
core +4 more sources
VGOS: The Becoming of an Operational System
American Geophysical Union Annual Meeting (AGU2024), What's Next for Science, 9-13 December 2024, Washington, D.C.The S/X VLBI network has been the production system of the IVS since the Service's inception in 1999.
Behrend, Dirk +3 more
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Earth Orientation Parameter Estimates from Geodetic VLBI observations in the ITRF2020
, 2022 American Geophysical Union Fall Meeting, 12-16 December 2022, ChicagoThe International Terrestrial Reference Frame (ITRF) provides a framework for all ground- and space-based measurements that help determine locations on the Earth's surface with high ...
Niell, Arthur E. +6 more
core
, 2016 Very Long Baseline Interferometry (VLBI) is an essential technique forspace-geodesy. It realizes the International Celestial Reference Frame(ICRF) and provides a link between the Earth- and space-fixed coordinatesystems by directly observing all Earth ...
Kareinen, Niko Petteri,
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