Results 21 to 30 of about 849 (158)
The Compatibility of DORIS with VGOS
, 2023 In global geodesy co-location of geodetic space techniques are required for mutual control of the measurements. The ground-based active transmitters of the DORIS system are in conflict to VLBI-observations. The VLBI systems are designed to receive extremely faint cosmic signals down to -110 dBm , whereas the DORIS beacon emits signals at a frequency of
Bautista-Duran, Marta +10 more
openaire +2 more sources
Earth, Planets and Space, 2023 VLBI simulation studies are carried out to investigate the impact of any proposed station or strategy on the geodetic parameters, such as Earth Orientation Parameters (EOP) and Terrestrial Reference Frame (TRF). In general, such studies are performed for
Sujata Dhar +5 more
doaj +1 more source
Estimation of VGOS Station Coordinates [PDF]
, 2020 <p>With the number of available VGOS (VLBI Global Observing System) sessions rising, precise coordinates for the participating stations become more important. While station coordinates can be estimated during the VLBI (Very Long Baseline Interferometry) analysis, the definition of the geodetic datum via Not-Net-Rotation (NNR) and
Markus Mikschi +2 more
openaire +2 more sources
The Short-Arc Precise Orbit Determination of GEO Satellites Using VLBI and Transfer Ranging
Remote Sensing, 2022 It is important for a geostationary Earth orbit (GEO) satellite to rapidly recover its orbit after a maneuver with short-arc precise orbit determination (POD).
Kai Nan +5 more
doaj +1 more source
Bridging astronomical, astrometric and geodetic scheduling for VGOS [PDF]
Journal of Geodesy, 2023 AbstractVery Long Baseline Interferometry (VLBI) experiments are organized within the geodetic, astrometric and astronomical communities for different applications, requiring different observation strategies adopted in scheduling. Currently, the next-generation geodetic and astrometric VLBI Global Observing System (VGOS) is being established.
Schartner, Matthias +4 more
openaire +4 more sources
Prospective study of high geodetic resolution to future VGOS reference point determination
Geodesy and Geodynamics, 2019 The fast slewing rate and wide band of the VLBI2010 Global Observing System (VGOS) telescopes are beneficial to procure more observations and to obtain VLBI reference points (RPs) of high precisions.
Zhibin Zhang +3 more
doaj +1 more source
Journal of Marine Science and Engineering, 2023 The Yellow Sea Cold Water Mass (YSCWM) is an important component of the hydrodynamic system and it significantly impacts the primary production of the Yellow Sea.
Jing Yang +7 more
doaj +1 more source
Ultra-rapid earth rotation determination with VLBI during CONT11 and CONT14 [PDF]
, 2016 We present earth rotation results from the ultra-rapid operations during the continuous VLBI campaigns CONT11 and CONT14. The baseline Onsala--Tsukuba, i.e., using two out of the 13 and 17 stations contributing to CONT11 and CONT14, respectively, was ...
Rüdiger Haas +3 more
core +1 more source
A new version of the OCARS catalog of Optical Characteristics of Astrometric Radio Sources [PDF]
, 2018 A new version of the Optical Characteristics of Astrometric Radio Sources (OCARS) catalog is presented. This compiled catalog includes radio sources observed in different VLBI programs and experiments that result in source position determination, their ...
Malkin, Zinovy
core +2 more sources
Experimental constraints on the uncoupled Galileon model from SNLS3 data and other cosmological probes [PDF]
, 2013 International audienceAims. The Galileon model is a modified gravity theory that may provide an explanation for the accelerated expansion of the Universe.
Astier, P. +6 more
core +6 more sources