Results 31 to 40 of about 160 (88)
Prototype System for Unmanned Reference Point Determination at the Sub‐Millimeter Level
Earth and Space Science, Volume 11, Issue 2, February 2024.Abstract The determination of reference points for telescopes is crucial for obtaining the local‐tie vector for a multi‐technology co‐located station. Traditional methods suffer from labor‐intensive fieldwork, long execution cycles, and systematic errors due to the incident angle of the total station's laser beam on the prism. In this paper, we propose
Zhibin Zhang +7 more
wiley +1 more source
Proceedings of the 25th European VLBI Group for Geodesy and Astrometry Working Meeting
, 2021 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.
M. Lindqvist +8 more
core
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
A Modular Approach for the Design of Quadruple Ridged Flared Horn Antenna Feeds
IEEE AccessThis paper presents the methodology followed for the design of a quad-ridged flared horn (QRFH) feed for the VLBI Global Observing System (VGOS) antennas.
Oscar Garcia-Perez +6 more
doaj +1 more source
An assessment of the accuracy of the VGOS geodetic products
, 2021 American Geophysical Union (AGU) Fall Meeting, 13-17 December 2021, New OrleansThe next-generation VLBI system called VGOS (VLBI Global Observing System) is now operational.
Macmillan, Daniel S. +10 more
core
Earth, Planets and SpaceIrregularities in the Earth’s rotation speed are quantified by the difference between Universal Time (UT1) and Coordinated Universal Time (UTC).
Arnab Laha +6 more
doaj +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
Optimal distribution of VLBI transmitters in the Galileo space segment for frame ties. [PDF]
Earth Planets Space, 2023 Wolf H, Böhm J.
europepmc +1 more source
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
VLBI celestial and terrestrial reference frames VIE2022b
, 2023 Context. We present the computation of global reference frames from very long baseline interferometry (VLBI) observations at the Vienna International VLBI Service for Geodesy and Astrometry (IVS) Analysis Center (VIE) in detail. We focus on the celestial
Mayer, David +11 more
core +1 more source