Results 51 to 60 of about 128,513 (313)

Signature of Saturn's auroral cusp: Simultaneous Hubble Space Telescope FUV observations and upstream solar wind monitoring [PDF]

, 2005
peer reviewedModel simulations by Bunce et al. (2005a) have shown that direct precipitation of electrons in Saturn's dayside cusp regions is not capable of producing significant FUV aurora.
Cowley, Stanley W.H., Badman, Sarah V, Cowley, Stanley W. H., Bunce, Emma J., Grodent, Denis, Bunce, Emma J, Gérard, Jean-Claude, Clarke, John T., Clarke, John T, Badman, Sarah V.   +9 more
core   +1 more source

Study of Free‐Space Optical Quantum Network: Review and Prospectives

Advanced Science, EarlyView.
Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley   +1 more source

Adaptation and Mechanical Validation of a COTS Telescope for LEO Hyperspectral Imaging Using an Additively Manufactured Structure

Applied Sciences
Small satellites provide cost-effective platforms for environmental monitoring. Open-source commercial off-the-shelf (COTS) hyperspectral payloads, such as those launched with HYPSO-1 and -2, have a ground sampling distance (GSD) of 100 m.
Henrik H. Øvrebø, Brage Sterkeby Hole, Henrik Pedersen Hauge, Martin Steinert, Anna Olsen, Fred Sigernes, Joseph L. Garrett   +6 more
doaj   +1 more source

Project of the Large Solar Telescope with mirror 3 m in diameter

Solar-Terrestrial Physics, 2020
One of the most important problems of modern solar physics is the observation of the small-scale structure of the solar atmosphere at various heights (including the chromosphere and corona) in different spectral lines.
Grigoryev V.M., Demidov M.L., Kolobov D.Yu., Pulyaev V.A., Skomorovsky V.I., Chuprakov S.A.   +5 more
doaj   +1 more source

Implementation of a Large-Area Diffractive Lens Using Multiple Sub-Aperture Diffractive Lenses and Computational Reconstruction

Photonics, 2022
Direct imaging systems that create an image of an object directly on the sensor in a single step are prone to many constraints, as a perfect image is required to be recorded within this step.
Shivasubramanian Gopinath, Praveen Periysamy Angamuthu, Tauno Kahro, Andrei Bleahu, Francis Gracy Arockiaraj, Daniel Smith, Soon Hock Ng, Saulius Juodkazis, Kaupo Kukli, Aile Tamm, Vijayakumar Anand   +10 more
doaj   +1 more source

IMF dependence of the open-closed field line boundary in Saturn's ionosphere, and its relation to the UV auroral oval observed by the Hubble Space Telescope [PDF]

, 2007
We study the dependence of Saturn's magnetospheric magnetic field structure on the interplanetary magnetic field (IMF), together with the corresponding variations of the open-closed field line boundary in the ionosphere.
Badman, S. V., S. W. H. Cowley, S. V. Badman, M. S. Blokhina, M. S. Grigoryan, Belenkaya, E. S., V. V. Kalegaev, Grigoryan, M. S., E. S. Belenkaya, I. I. Alexeev, Cowley, S. W. H., Alexeev, I. I., Kalegaev, V. V., Blokhina, M. S.   +13 more
core   +1 more source

Heterogeneous Visible‐Light Photocatalysis in Continuous‐Flow: A Synergistic Strategy for Challenging Trifluoromethylation of α, α‐Diaryl Allylic Alcohols via 1,2‐aryl Migration

Advanced Science, EarlyView.
A continuous‐flow photocatalytic strategy is presented for the efficient synthesis of β‐trifluoromethyl ketones under visible light. Using a recyclable solid photocatalyst and an inexpensive CF3 source, the method enables rapid reactions, easy scale‐up, and smooth integration into multistep flow synthesis of bioactive molecules.
Peiwen Liu, Weiping Zhu, Xuhong Qian, Fang Zhao   +3 more
wiley   +1 more source

Implementing of the ISON project in Northern Mexico

Open Astronomy, 2018
ISON, being an open international project that collects and interprets data about space objects for scientific analysis and spacecraft operators, includes about 40 observational sites.
Mokhnatkin Artem, Molotov Igor, Tijerina Eduardo Gerardo Perez, Leon José Enrique Perez, Kokina Tatiana, Schildknecht Thomas   +5 more
doaj   +1 more source

Structure of distributed control system in Seimei telescope

SICE Journal of Control, Measurement, and System Integration, 2021
A segmented mirror control system is indispensable for operating an astronomical telescope which is equipped with a segmented primary mirror. In this study, we focus on the distributed control system (DCS) proposed for Seimei telescope.
Ichiro Jikuya, Daichi Uchida, Masaru Kino, Mikio Kurita, Katsuhiko Yamada   +4 more
doaj   +1 more source

Long-Term Trends of Astroclimatic Parameters above the Terskol Observatory

Atmosphere, 2023
Astroclimatic conditions characterize the quality of an astronomical site. The Terskol Observatory was founded over 42 years ago in 1980. The astronomical site (coordinates 43°16′29″ N, 42°30′03″ E) is located about 10 km from Mt.
Lidia A. Bolbasova, Evgeniy A. Kopylov
doaj   +1 more source