Results 21 to 30 of about 533,452 (194)
Pointing error compensation of electro-optical detection systems using Gaussian process regression
International Journal of Metrology and Quality Engineering, 2021 Pointing accuracy is an important indicator for electro-optical detection systems, as it significantly affects the system performance. However, as a result of misalignment, nonperpendicularity in the manufacturing and assembly processes, as well as the ...
Tang Qijian +3 more
doaj +1 more source
Evaluating pointing errors on ergodic capacity of DF relay-assisted FSO communication systems [PDF]
, 2015 Ergodic capacity of decode-and-forward (DF) relay-assisted free-space optical (FSO) communication systems when line of sight is available is analyzed over gamma-gamma fading channels with pointing errors.
Boluda-Ruiz, Rubén +3 more
core +1 more source
Inverse Solution Error Analysis and Correction of Beam Steering System Based on Risley Prisms
Applied Sciences, 2022 The pointing accuracy of the Risley prisms beam-steering system mainly depends on the accuracy of the solution method and the impact of the error on the solution.
Yinuo Song +4 more
doaj +1 more source
IEEE Photonics Journal, 2019 In this paper, we introduce a decode-and-forward multi-hop hybrid free-space optical/radio frequency (FSO/RF) system. The FSO link is assumed to follow Gamma-Gamma distribution with the combined effects of pointing errors and path loss under intensity ...
Wagdy A. Alathwary +1 more
doaj +1 more source
On-sky demonstration of low-order wavefront sensing and control with focal plane phase mask coronagraphs [PDF]
, 2015 The ability to characterize exoplanets by spectroscopy of their atmospheres requires direct imaging techniques to isolate planet signal from the bright stellar glare.
Baudoz, Pierre +8 more
core +5 more sources
IEEE Photonics JournalVehicular quantum communication terminals (VQCTs) are crucial for establishing global-scale quantum networks. High-precision line-of-sight (LOS) pointing is essential for fast and reliable acquisition in satellite-based quantum key distribution (QKD ...
Zihao Wang +8 more
doaj +1 more source
, 2011 Wind-induced pointing errors are a serious concern for large-aperture high-frequency radio telescopes. In this paper, we describe the implementation of an optical quadrant detector instrument that can detect and provide a correction signal for wind ...
Bayley A. M. +15 more
core +1 more source
Modelling Error Rates in Temporal Pointing [PDF]
Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems, 2016 We present a novel model to predict error rates in temporal pointing. With temporal pointing, a target is about to appear within a limited time window for selection. Unlike in spatial pointing, there is no movement to control in the temporal domain; the user can only determine when to launch the response.
Oulasvirta, Antti, Lee, Byungjoo
openaire +3 more sources
Lyot-based Ultra-Fine Pointing Control System for Phase Mask Coronagraphs
, 2013 High performance coronagraphic imaging at small inner working angle requires efficient control of low order aberrations. The absence of accurate pointing control at small separation not only degrades coronagraph starlight rejection but also increases the
Baudoz, Pierre +5 more
core +1 more source
Impact of Pointing Errors on the Performance of Mixed RF/FSO Dual-Hop Transmission Systems [PDF]
, 2013 In this work, the performance analysis of a dual-hop relay transmission system composed of asymmetric radio-frequency (RF)/free-space optical (FSO) links with pointing errors is presented.
Alouini, Mohamed-Slim +2 more
core +2 more sources