Results 141 to 150 of about 9,059 (229)

New Progress in VLBI tracking of GNSS satellites at GFZ [PDF]

, 2014
The topic VLBI tracking of GNSS satellites has emerged lately as a new way for linking of the dynamic reference frame realized by GNSS satellites to the ICRF.
Kodet J., Pogrebenko S., Haas R., Nilsson T., TORNATORE, VINCENZA, Lu C., Liu L., Mora Diaz J. A, Soja B., Xu M., Heinkelmann R., Kronschnabl G., Plötz C., Karbon M., Raposo Pulido V., Schreiber U., Li J., Schuh H., Duev D., Neidhardt A.   +19 more
core  

The Australian mixed-mode observing program. [PDF]

J Geod, 2022
McCallum L, Chin Chuan L, Krásná H, McCallum J, Böhm J, McCarthy T, Gruber J, Schartner M, Quick J, Rogers A.   +9 more
europepmc   +1 more source

The VLBI core in radio loud AGNs [PDF]

, 2001
We present statistical results on VLBI cores from large VLBI samples at C, L and S/X bands. Most of the results are consistent with the inhomogeneous jet model.
Schilizzi, RT, Zhou, JF, Vogel, SN, Elvis, MS, Jiang, DR, Paresce, F, Cao, XW   +6 more
core  

Milliarcsecond-resolution Radio-imaging Survey of Blazar Candidates at 4 < z < 5.4

The Astrophysical Journal Supplement Series
We present a milliarcsecond-resolution radio survey of 17 high-redshift (4 ≤ z ≤ 5.4) blazar candidates observed with the European Very Long Baseline Interferometry (VLBI) Network at 5 GHz.
Máté Krezinger, Alessandro Caccianiga, Daniele Dallacasa, Luca Ighina, Sándor Frey, Alberto Moretti, Sonia Antón, Silvia Belladitta, Claudia Cicone, Krisztina É. Gabányi, M. J. M. Marchã, Krisztina Perger   +11 more
doaj   +1 more source

Detection of a New Large Free Core Nutation Phase Jump. [PDF]

Sensors (Basel), 2022
Malkin Z, Belda S, Modiri S.
europepmc   +1 more source

Opportunities with VLBI Transmitters on Satellites

Abstract Very Long Baseline Interferometry (VLBI) transmitters on satellites are considered for future satellites of Global Navigation Satellite Systems (GNSS) as well as for the upcoming Genesis mission of the European Space Agency (ESA).
Böhm, J., Wolf, H.
openaire   +2 more sources

A ring-like accretion structure in M87 connecting its black hole and jet. [PDF]

Nature, 2023
Lu RS, Asada K, Krichbaum TP, Park J, Tazaki F, Pu HY, Nakamura M, Lobanov A, Hada K, Akiyama K, Kim JY, Marti-Vidal I, Gómez JL, Kawashima T, Yuan F, Ros E, Alef W, Britzen S, Bremer M, Broderick AE, Doi A, Giovannini G, Giroletti M, Ho PTP, Honma M, Hughes DH, Inoue M, Jiang W, Kino M, Koyama S, Lindqvist M, Liu J, Marscher AP, Matsushita S, Nagai H, Rottmann H, Savolainen T, Schuster KF, Shen ZQ, de Vicente P, Walker RC, Yang H, Zensus JA, Algaba JC, Allardi A, Bach U, Berthold R, Bintley D, Byun DY, Casadio C, Chang SH, Chang CC, Chang SC, Chen CC, Chen MT, Chilson R, Chuter TC, Conway J, Crew GB, Dempsey JT, Dornbusch S, Faber A, Friberg P, García JG, Garrido MG, Han CC, Han KC, Hasegawa Y, Herrero-Illana R, Huang YD, Huang CL, Impellizzeri V, Jiang H, Jinchi H, Jung T, Kallunki J, Kirves P, Kimura K, Koay JY, Koch PM, Kramer C, Kraus A, Kubo D, Kuo CY, Li CT, Lin LC, Liu CT, Liu KY, Lo WP, Lu LM, MacDonald N, Martin-Cocher P, Messias H, Meyer-Zhao Z, Minter A, Nair DG, Nishioka H, Norton TJ, Nystrom G, Ogawa H, Oshiro P, Patel NA, Pen UL, Pidopryhora Y, Pradel N, Raffin PA, Rao R, Ruiz I, Sanchez S, Shaw P, Snow W, Sridharan TK, Srinivasan R, Tercero B, Torne P, Traianou E, Wagner J, Walther C, Wei TS, Yang J, Yu CY.   +120 more
europepmc   +1 more source

Jet precession in the active nucleus of M81. Ongoing VLBI monitoring [Elektronisk resurs] [PDF]

, 2012
In a recent publication, we reported results of a multi-frequency VLBI campaign of observations of the Active Galactic Nucleus (AGN) in galaxy M\,81, phase-referenced to the supernova SN\,1993J. We were able to extract precise information on the relative
Brunthaler, Andreas,, Marcaide, Jon,, Marti-Vidal, Ivan,, Alberdi, Antxon,   +3 more
core  

In-depth analysis of schedules optimized for certain VLBI experiments using VieSched++ [PDF]

, 2019
Scheduling is an integral part of every VLBI experiment and, at this stage, already determines the geometric stability of the final solution. To increase the quality of the schedule, the TU Wien scheduling concept consists of two steps.
Müskens, Arno, Schartner, Matthias, Böhm, Johannes, Nothnagel, Axel, Plötz, Christian   +4 more
core  

Inter-Comparison of UT1-UTC from 24-Hour, Intensives, and VGOS Sessions during CONT17. [PDF]

Sensors (Basel), 2022
Raut S, Heinkelmann R, Modiri S, Belda S, Balidakis K, Schuh H.   +5 more
europepmc   +1 more source