Results 11 to 20 of about 701,425 (185)
A Reverse-Design Strategy for the Track Error of the Qi Tai Telescope Based on Pointing Accuracy
Engineering, 2022 The Qi Tai Telescope (QTT), which has a 110 m aperture, is planned to be the largest scale steerable telescope in the world. Ideally, the telescope’s repeated pointing accuracy error should be less than 2.5 arc seconds (arcsec); thus, the telescope ...
Na Li +4 more
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Propagation Characteristics of Hermite–Gaussian Beam under Pointing Error in Free Space
Photonics, 2022 Hermite–Gaussian (HG) beams have significant potential to improve the capacity of free-space optical communication (FSOC). The influence of pointing error on the propagation characteristics of an HG beam cannot be ignored in the FSOC system. Although the
Xin Liu +5 more
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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
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Satellite vibration effects on communication quality of OISN system
Open Engineering, 2022 Over space optical communications are considered as the critical technology for high-bandwidth, high-speed, and large-capacity communications. Indeed, the laser wavelength’s narrow beam divergence requires a precise beam pointing at both ends of the ...
Madhag Aqeel, Dhaam Haidar Zaeer
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IEEE Photonics Journal, 2023 Computer simulation is a powerful and convenient tool for the design and performance evaluation of free-space optical (FSO) communication systems. In this article, we present two simulation frameworks that incorporate not only the effects of atmospheric ...
Mat T. Nguyen, Vuong Mai, Hoon Kim
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Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET [PDF]
Atmospheric Measurement Techniques, 2013 Sensitivity studies indicate that among the diverse error sources of ground-based sky radiometer observations, the pointing error plays an important role in the correct retrieval of aerosol properties.
B. Torres +13 more
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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
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Error modeling and analysis of optomechanical platform based on multi-system theory
AIP Advances, 2020 The quality of camera imaging is of great significance in aerial photography and space target detection, especially in the fields of military reconnaissance and geographic resource telemetry.
Dongxue Wang +4 more
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A Simplified Pointing Model for Alt-Az Telescopes
Applied Sciences, 2023 The telescope pointing model plays a crucial role in characterizing and explaining the inaccuracies in the telescope’s pointing. It uses mathematical models to express these errors and suggests methods to calibrate and rectify them.
Yong Zhao +5 more
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International Journal of Antennas and Propagation, 2020 The purpose of this paper is to investigate a large radio telescope support point number effect on its pointing accuracy and provide a useful guideline for the large radio telescope design engineer. In a large radio telescope system, the azimuth track is
Song Xue +8 more
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