Results 281 to 290 of about 669,031 (383)

Space Surveillance with High-Frequency Radar. [PDF]

Sensors (Basel)
Hennessy B, Yardley H, Debnam R, Camilleri TA, Spencer NK, Holdsworth DA, Warne G, Cheung B, Kharabash S.   +8 more
europepmc   +1 more source

Laser Terminals on CubeSats: Developments for Telecommunications and Quantum Links

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Satellite‐based laser communication is an emerging technology that is finding its way from research to industry. Compared to radio frequency (RF) systems, it has a more efficient size, weight, and power budget and, furthermore, is license free.
Christian Roubal, Till Dolejsky, Benjamin Rödiger, Fabian Rein, Jorge Rosano Nonay, René Rüddenklau, Christos Papadopoulos, Christopher Schmidt, Florian Moll   +8 more
wiley   +1 more source

Recent Observations of the Position of Nova Aurigae with the 40-inch Telescope of the Yerkes Observatory [PDF]

, 1901
E. E. Barnard
openalex   +1 more source

Fully convolutional neural networks for processing observational data from small remote solar telescopes. [PDF]

Sci Rep
Jóźwik-Wabik P, Popowicz A.
europepmc   +1 more source

Photonic Integrated Circuits for Optical Satellite Links: A Review of the Technology Status and Space Effects

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Optical satellite communications provide high‐data rates with compact and power efficient payloads that can solve the bottlenecks of RF technologies. Photonic integrated circuits have the potential to reduce the cost, size, weight, and power consumption of satellite laser communications terminals, by integrating all the required photonic ...
Giulio Terrasanta, Marcin Wojciech Ziarko, Nicola Bergamasco, Menno Poot, Juraj Poliak   +4 more
wiley   +1 more source

Notes on the Manufacture of Tubes for Refracting Telescopes [PDF]

Frederick J. Brodie
openalex   +1 more source

Binocular Vision in Telescopes [PDF]

, 1880
Charles B. Boyle
openalex   +1 more source

High-Performance Telescope System Design for Space-Based Gravitational Waves Detection. [PDF]

Sensors (Basel)
Ji H, Zhao L, Fan Z, Fan R, Cao J, Mo Y, Tan H, Jiang Z, Ma D.   +8 more
europepmc   +1 more source

Statistics of Received Power Time Series for Optical LEO Satellite Uplinks

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT In free‐space optical satellite communications, a transmitted optical signal is perturbed by pointing inaccuracies and through the atmosphere's index‐of‐refraction turbulence. This leads to signal fluctuations and power fading when detected by a receiver. Knowledge of these signal instability statistics is advantageous for the design of robust
Andrea Carrillo‐Flores, Dirk Giggenbach, Marcus T. Knopp   +2 more
wiley   +1 more source

On a New Type of Telescope Objective Especially Adapted for Spectroscopic Use

, 1899
C. S. Hastings
openalex   +1 more source