Results 131 to 140 of about 11,731 (215)

Resolved imaging confirms a radiation belt around an ultracool dwarf. [PDF]

Nature, 2023
Kao MM, Mioduszewski AJ, Villadsen J, Shkolnik EL.   +3 more
europepmc   +1 more source

Astrometry with the 5-km Radio Telescope [PDF]

Monthly Notices of the Royal Astronomical Society, 1973
M. Ryle, B. Elsmore
openaire   +1 more source

Radio Astrometry at 24 and 43 GHz

, 2005
We describe the goals and initial results of a collaboration formed to survey extragalactic objects at radio frequencies of 24 and 43 GHz. This survey is for extending the International Celestial Reference Frame (ICRF) that is the current coordinate system for astrometry and which is the angular inertial frame of deep space navigation.
Lanyi, G., Boboltz, D., Charlot, P., Fey, A., Fomalont, E., Gordon, D., Jacobs, C., Ma, C., Naudet, C., Sovers, O., Zhang, L.   +10 more
openaire   +1 more source

Time-lapse Very Long Baseline Interferometry Imaging of the Close Active Binary HR 1099

The Astrophysical Journal
We report multiepoch astrometric very long baseline interferometry observations of the chromospherically active binary HR 1099 (V711 Tau, HD 22468) at six epochs over 63 days using the Very Long Baseline Array at 22.2 GHz.
Walter W. Golay, Robert L. Mutel, Evan E. Abbuhl   +2 more
doaj   +1 more source

VGOS Dual Linear Polarization Data Processing Techniques Applied to Differential Observation of Satellites

Remote Sensing
The Very Long Baseline Interferometry Global Observing System (VGOS), a global network of stations equipped with small-diameter, fast-slewing antennas and broadband receivers, is primarily utilized for geodesy and astrometry.
Jiangying Gan, Fengchun Shu, Xuan He, Yidan Huang, Fengxian Tong, Yan Sun   +5 more
doaj   +1 more source

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 AllWISE Catalog as an Infrared Celestial Reference Frame in the Gaia Era

The Astronomical Journal
The launch of Gaia in 2013 December ushered in a new era of space astrometry, allowing for fundamental reference research at an unprecedented level of precision.
J.-C. Liu, N. Liu, Z. Zhu, J. Yao, I. Nurul Huda, Z.-W. Wang   +5 more
doaj   +1 more source

Jupiter Science Enabled by ESA's Jupiter Icy Moons Explorer. [PDF]

Space Sci Rev, 2023
Fletcher LN, Cavalié T, Grassi D, Hueso R, Lara LM, Kaspi Y, Galanti E, Greathouse TK, Molyneux PM, Galand M, Vallat C, Witasse O, Lorente R, Hartogh P, Poulet F, Langevin Y, Palumbo P, Gladstone GR, Retherford KD, Dougherty MK, Wahlund JE, Barabash S, Iess L, Bruzzone L, Hussmann H, Gurvits LI, Santolik O, Kolmasova I, Fischer G, Müller-Wodarg I, Piccioni G, Fouchet T, Gérard JC, Sánchez-Lavega A, Irwin PGJ, Grodent D, Altieri F, Mura A, Drossart P, Kammer J, Giles R, Cazaux S, Jones G, Smirnova M, Lellouch E, Medvedev AS, Moreno R, Rezac L, Coustenis A, Costa M.   +49 more
europepmc   +1 more source

Time, geodesy, and astrometry: Results from radio interferometry [PDF]

The results from a total of a dozen transcontinental and intercontinental VLBI experiments are discussed. Particular emphasis is placed on: (1) the inferred behavior of the frequency standards, usually hydrogen masers, on time scales from 10 to 100,000 ...
Clark, T. A., Shapiro, I. I.
core   +1 more source

A repeating fast radio burst associated with a persistent radio source. [PDF]

Nature, 2022
Niu CH, Aggarwal K, Li D, Zhang X, Chatterjee S, Tsai CW, Yu W, Law CJ, Burke-Spolaor S, Cordes JM, Zhang YK, Ocker SK, Yao JM, Wang P, Feng Y, Niino Y, Bochenek C, Cruces M, Connor L, Jiang JA, Dai S, Luo R, Li GD, Miao CC, Niu JR, Anna-Thomas R, Sydnor J, Stern D, Wang WY, Yuan M, Yue YL, Zhou DJ, Yan Z, Zhu WW, Zhang B.   +34 more
europepmc   +1 more source