Results 81 to 90 of about 11,788,095 (170)

Long baseline vector determinations and intercomparisons [PDF]

, 1980
The East Coast very long baseline interferometry (VLBI) group has performed about 60 experiments over the last 10 years in the process of developing and exploiting advanced VLBI techniques.
Knight, C. A.
core  

Parallaxes and Proper Motions of Long Period Variable Stars Determined from VLBI and Gaia DR3

Galaxies
Annual parallaxes of Galactic long period variable stars (LPVs) are essential for determining their distances and intrinsic properties, but their measurement remains challenging because of their large stellar sizes, circumstellar matter, and time ...
Akiharu Nakagawa, Tomoharu Kurayama, Hiroshi Sudou, Gabor Orosz   +3 more
doaj   +1 more source

An accuracy assessment of Magellan Very Long Baseline Interferometry (VLBI) [PDF]

, 1990
Very Long Baseline Interferometry (VLBI) measurements of the Magellan spacecraft's angular position and velocity were made during July through September, 1989, during the spacecraft's heliocentric flight to Venus. The purpose of this data acquisition and
Kronschnabl, G. R., Border, J. S., Engelhardt, D. B.   +2 more
core  

Very long baseline interferometry and geodetic applications [PDF]

, 1980
Very Long Baseline Radio Interferometry is one of the most recently developed and potentially most useful geodetic measuring techniques. The high accuracy which it can achieve over great distances makes it ideally suited. for studies of many interesting
McLintock, David Neil
core  

A Coherent Fiber Link for Very Long Baseline Interferometry [PDF]

, 2015
We realize a coherent fiber link for application in very long baseline interferometry (VLBI) for radio astronomy and geodesy. A 550-km optical fiber connects the Italian National Metrological Institute (INRIM) to a radio telescope in Italy and is used ...
Bortolotti, Claudio, Ambrosini, Roberto, Frittelli, Matteo, LEVI, FILIPPO, ZUCCO, MASSIMO, CLIVATI, CECILIA, Costanzo, Giovanni Antonio, Costanzo, Giovanni A., CALONICO, DAVIDE, Costanzo, Giovanni A, Mura, Alberto, Perini, Federico, Roma, Mauro   +12 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

Effects of Earth’s Oblateness on Black Hole Imaging through Earth–Space and Space–Space Very Long Baseline Interferometry

The Astrophysical Journal
Earth-based very long baseline interferometry (VLBI) has made rapid advances in imaging black holes. However, due to the limitations imposed on terrestrial VLBI by the Earth’s finite size and turbulent atmosphere, it is imperative to have a space-based ...
Aditya Tamar, Ben Hudson, Daniel C. M. Palumbo   +2 more
doaj   +1 more source

Crustal motion in Europe determined with geodetic Very Long Baseline Interferometry

, 1998
Since 1990 the European fixed station geodetic Very Long Baseline Interferometry [VLBI] network has been observing on a regular basis in order to determine crustal motion in Europe. Usually 6 European geodetic VLBI sessions are performed each year.
Rüdiger Haas, Axel Nothnagel
core  

Very long baseline interferometry and geodetic applications [PDF]

Very Long Baseline Radio Interferometry is one of the most recently developed and potentially most useful geodetic measuring techniques. The high accuracy which it can achieve over great distances makes it ideally suited. for studies of many interesting
McLintock, David Neil
core   +2 more sources

Scintillation Properties of PSR B1133+16 Measured with Very Long Baseline Interferometry

The Astrophysical Journal
The scintillation of pulsars reveals the small-scale structure of the interstellar medium. A powerful technique for characterizing the scintillating structures (screens) combines analysis of scintillation arcs and very long baseline interferometry (VLBI).
Ashley M. Stock, Fardin Syed, Marten H. van Kerkwijk, Rebecca Lin, Franz Kirsten, Ue-Li Pen   +5 more
doaj   +1 more source