Results 31 to 40 of about 27,573 (245)
VLBI Type Experimental Observation of GPS [PDF]
Journal of Astronomy and Space Sciences, 2010 As a preparatory study for Global Positioning System-Very Long Baseline Interferometry (GPS-VLBI) hybrid system, we examined if VLBI type observation of the GPS signal is realizable through a test experiment.
Younghee Kwak +6 more
doaj +1 more source
HINOTORI and Its Perspectives in the Black-Hole Jet Study
Galaxies, 2023 Simultaneous multi-band very long baseline interferometry (VLBI) observations at millimeter wavelengths have huge potential for various science cases.
Toshihisa Tsutsumi +12 more
doaj +1 more source
Space Weather, 2021 Geodetic very long baseline interferometry (VLBI) observations are carried out, with the legacy system, using two well‐separated frequency bands in order to determine first‐order ionospheric delay corrections corresponding to the combined effect of total
Hossein Etemadfard +3 more
doaj +1 more source
, 1991 VSOP-to-ground VLBI and mm VLBI are both needed if we want to further increase our knowledge of quasars, radio galaxies and their radio jets, mm VLBI will be a better instrument to study the "central engine" while satellite VLBI will better show the ...
Bååth, L.B.,
core +8 more sources
Global Geodetic Observing System 2015–2018 [PDF]
Geodesy and Cartography, 2019 Global Geodetic Observing System (GGOS) was established in 2003 by the International Association of Geodesy (IAG) with the main goal to deepen understanding of the dynamic Earth system by quantifying human-induced Earth’s changes in space and time.
Krzysztof Sośnica, Jarosław Bosy
doaj +1 more source
Journal of Geodesy, 2021 We have developed a broadband VLBI (very long baseline interferometry) system inspired by the concept of the VLBI Global Observing System (VGOS). The new broadband VLBI system was implemented in the Kashima 34 m antenna and in two transportable stations ...
M. Sekido +24 more
semanticscholar +1 more source
The Size, Shape, and Scattering of Sagittarius A* at 86 GHz: First VLBI with ALMA [PDF]
Astrophysical Journal, 2019 The Galactic center supermassive black hole Sagittarius A* (Sgr A*) is one of the most promising targets to study the dynamics of black hole accretion and outflow via direct imaging with very long baseline interferometry (VLBI).
S. Issaoun +43 more
semanticscholar +1 more source
Precise VLBI/GNSS ties with micro-VLBI
, 2023 We present here a concept of measuring local ties between collocated GNSS and VLBI stations using the microwave technique that effectively transforms a GNSS receiver to an element of a VLBI network. This is achieved by modifying the signal chain that allows to transfer voltage of the GNSS antenna to a digitizer via a coaxial cable.
Petrov, Leonid +5 more
openaire +2 more sources
Microarcsecond VLBI Pulsar Astrometry with PSRπ II. Parallax Distances for 57 Pulsars [PDF]
Astrophysical Journal, 2018 We present the results of PSRπ, a large astrometric project targeting radio pulsars using the Very Long Baseline Array (VLBA). From our astrometric database of 60 pulsars, we have obtained parallax-based distance measurements for all but 3, with a ...
A. Deller +10 more
semanticscholar +1 more source
A Synoptic VLBI Technique for Localizing Nonrepeating Fast Radio Bursts with CHIME/FRB [PDF]
, 2020 We demonstrate the blind interferometric detection and localization of two fast radio bursts (FRBs) with subarcminute precision on the 400 m baseline between the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and the CHIME Pathfinder. In the same
C. Leung +19 more
semanticscholar +1 more source