Results 21 to 30 of about 3,231,981 (288)

ALMA High-frequency Long-baseline Campaign in 2019: Band 9 and 10 In-band and Band-to-band Observations Using ALMA’s Longest Baselines

open access: yesThe Astrophysical Journal Supplement Series, 2023
The Atacama Large Millimeter/submillimeter Array high-frequency long-baseline campaign in 2019 (HF-LBC-2019) was arranged to undertake band 9 (690 GHz) and 10 (850 GHz) observations using the longest 16 km baselines in order to explore calibration ...
Luke T. Maud   +8 more
doaj   +1 more source

Observation of double star by long-baseline interferometry [PDF]

open access: yes, 2014
This paper serves as a reference on how to estimate the parameters of binary stars and how to combine multiple techniques, namely astrometry, interferometry and radial velocities.Comment: F. Millour, A. Chiavassa, L. Bigot, O. Chesneau, A. Meilland \& P.
Bonneau, Daniel   +2 more
core   +5 more sources

Geophysical aspects of very long baseline neutrino experiments [PDF]

open access: yes, 2001
Several proposed experiments will send beams of neutrinos through the Earth along paths with a source-receiver distance of hundreds or thousands of kilometers. Knowledge of the physical properties of the medium traversed by these beams, in particular the
Bullen   +10 more
core   +2 more sources

Research on target location technology based on long baseline (TDOA) [PDF]

open access: yesZhihui kongzhi yu fangzhen
In the sea test range, the accurate measurement of the landing point of weapons and equipment is the key issue to assess the strike accuracy. In order to improve the accuracy measurement of the landing point of weapons, this paper studies the long ...
FENG Xudong, YIN Feixing, LI Qi, GAO Tongtong, XIAO Yuan, LIU Yijun
doaj   +1 more source

Long baseline experiments

open access: yes, 2022
Long baseline ...
openaire   +1 more source

Long baseline neutrino oscillation experiments with accelerators in Japan

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
The development of long baseline neutrino oscillation experiments with accelerators in Japan is reviewed. Accelerator experiments can optimize experimental conditions, such as the beam and the detector, as needed.
Tsuyoshi Nakaya, Koichiro Nishikawa
doaj   +1 more source

Long Baseline Optical Interferometry [PDF]

open access: yesHighlights of Astronomy, 1989
During the last three years significant results have been obtained from several operational, long baseline optical interferometers. Precision stellar angular diameters (accuracy of order 2% and better) have been reported in the infrared (DiBenedetto and Rabbia, 1987) and in the visible (Davis and Tango, 1986).
openaire   +1 more source

Real-time Kinematic Positioning Test and Analysis Based on Railway Scene

open access: yesKongzhi Yu Xinxi Jishu, 2021
In recent years, with the wide application of global navigation satellite system (GNSS) positioning technology, train positioning technology in railway industry has gradually developed from traditional rough positioning to high-precision real-time ...
ZHANG Hu, XIAO Lizhi
doaj  

High-sensitivity Beamformed Observations of the Crab Pulsar's Radio Emission

open access: yesThe Astrophysical Journal, 2023
We analyzed four epochs of beamformed European VLBI Network data of the Crab Pulsar at 1658.49 MHz. With the high sensitivity resulting from resolving out the Crab Nebula, we are able to detect even the faint high-frequency components in the folded ...
Rebecca Lin, Marten H. van Kerkwijk
doaj   +1 more source

Observational Evidence of a Centi-parsec Supermassive Black Hole Binary Existing in the Nearby Galaxy M81

open access: yesThe Astrophysical Journal, 2023
Studying a centi-parsec supermassive black hole binary (SMBHB) would allow us to explore a new parameter space in active galactic nuclei, and these objects are also potential sources of gravitational waves.
Wu Jiang   +8 more
doaj   +1 more source

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