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10 papers · 1 filter
The ALMA Phasing System: A Beamforming Capability for Ultra-High-Resolution Science at (Sub)Millimeter Wavelengths
L. D. Matthews, G. B. Crew, S. S. Doeleman +38
The Atacama Millimeter/submillimeter Array (ALMA) Phasing Project (APP) has developed and deployed the hardware and software necessary to coherently sum the signals of individual A…
Phase correction for ALMA - Investigating water vapour radiometer scaling:The long-baseline science verification data case study
L. T. Maud, R. P. J. Tilanus, T. A. van Kempen +9
The Atacama Large millimetre/submillimetre Array (ALMA) makes use of water vapour radiometers (WVR), which monitor the atmospheric water vapour line at 183 GHz along the line of si…
ALMA Long Baseline Campaigns: Phase Characteristics of Atmosphere at Long Baselines in the Millimeter and Submillimeter Wavelengths
Satoki Matsushita, Yoshiharu Asaki, Edward B. Fomalont +9
This paper presents the first detailed investigation of the characteristics of mm/submm phase fluctuation and phase correction methods obtained using ALMA with baseline lengths up…
Analysis of antenna position measurements and weather station network data during the ALMA Long Baseline Campaign of 2015
Todd R. Hunter, Robert Lucas, Dominique Broguiere +5
In a radio interferometer, the determination of geometrical antenna positions relies on accurate calibration of the dry and wet delay of the atmosphere above each antenna. For the…
The ALMA archive and its place in the astronomy of the future
Felix Stoehr, Mark Lacy, Stéphane Leon +4
The Atacama Large Millimeter/submillimeter Array (ALMA), an international partnership of Europe, North America and East Asia in cooperation with the Republic of Chile, is the large…
The ALMA Band 9 receiver - Design, construction, characterization, and first light
A. M. Baryshev, R. Hesper, F. P. Mena +24
We describe the design, construction, and characterization of the Band 9 heterodyne receivers (600-720 GHz) for the Atacama Large Millimeter / submillimeter Array (ALMA). The ALMA…