Results 11 to 20 of about 2,474,049 (303)
Adaptive Optics for Astronomy [PDF]
Annual Review of Astronomy and Astrophysics, 2012 Adaptive optics is a prime example of how progress in observational astronomy can be driven by technological developments. At many observatories it is now considered to be part of a standard instrumentation suite, enabling ground-based telescopes to reach the diffraction limit and, thus, providing spatial resolution superior to that achievable from ...
Davies, R., Kasper, M.
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Improvements to MOS CCD technology for future X-ray astronomy missions [PDF]
, 2008 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This thesis is concerned with the development of MOS charge-coupled device (CCD) technology for future applications in X-ray astronomy.
Murray, Neil John
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Optical interferometry in astronomy [PDF]
Reports on Progress in Physics, 2003 Here I review the current state of the field of optical stellar interferometry, concentrating on ground-based work although a brief report of space interferometry missions is included. We pause both to reflect on decades of immense progress in the field as well as to prepare for a new generation of large interferometers just now being commissioned ...
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Long-distance fiber-optical transfer of a radio-frequency control signal for radio-astronomy and sensing applications [PDF]
, 2018 Passive phase-conjugation enables precise fiber-optical transfer of radio-frequency reference signals over long distances, yielding high long-term stability for radio-astronomy and remote-sensing applications without active path-length ...
Warrington, Richard B +10 more
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Open skies: the National Radio Astronomy Observatory and its impact on US radio astronomy [PDF]
, 2020 This open access book on the history of the National Radio Astronomy Observatory covers the scientific discoveries and technical innovations of late 20th century radio astronomy with particular attention to the people and institutions involved.
Kellermann, Kenneth I. +5 more
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Results of the Optical Downlink Experiment KIODO from OICETS Satellite to Optical Ground Station Oberpfaffenhofen (OGS-OP) [PDF]
, 2007 Optical LEO downlinks from the Japanese OICETS to the optical ground station built by the German Aerospace Center (DLR) near Munich have been performed. This was the first optical LEO downlink on European grounds.
Perlot, Nicolas +13 more
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A two-way photonic quantum entanglement transfer interface
npj Quantum Information, 2022 A quantum interface for two-way entanglement transfer, e.g., between orbital angular momentum degree of freedom in free space and time-energy degree of freedom in optical fibers, provides a way toward establishing entanglement between remote ...
Yiwen Huang +5 more
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An Attempt to Construct an Activity Cycle Catalog with Kepler Long-Cadence Light Curves
Universe, 2022 Many stars show activity cycles like the Sun. Kepler has gathered ∼200,000 light curves. Most of the Kepler stars only have long-cadence light curves, which limits their applicable methods.
Yu-Fu Shen, Gang Zhao, Sarah A. Bird
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A 15-user quantum secure direct communication network
Light: Science & Applications, 2021 A 15-user quantum secure direct communication (QSDC) network is experimentally demonstrated, and any two users can perform QSDC task over 40 kilometers of optical fiber.
Zhantong Qi +5 more
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A fully-connected three-user quantum hyperentangled network
Quantum Frontiers, 2023 Exploiting the fantastic features of quantum mechanics, a hyperentangled quantum network encoded in multiple degree of freedoms (DOF), e.g., polarization and orbital angular momentum DOFs, can encode more qubits per transmitted photon and offers a ...
Yiwen Huang +5 more
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