Using Allan Variance Based Semi-Parameter Model to Calibrate Pointing Errors of Alt-az Telescopes
Applied Sciences, 2018 In this paper, a new model called Allan variance based semi-parameter model is put forward to improve the pointing precision for alt-az telescopes.
Lingjie Yan, Yongmei Huang, Yahui Zhang
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Effect of Pointing Errors on the Performance of Hybrid FSO/RF Networks
IEEE Access, 2019 The performance of a free space optics (FSO) transmission suffers from the atmospheric turbulence and the attenuation in foggy environment. By employing relay nodes, the error rate and the coverage area of the FSO communication system can be ...
Shubha Sharma +2 more
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EFFECT OF ANTENNA POINTING ERRORS ON SAR IMAGING CONSIDERING THE CHANGE OF THE POINT TARGET LOCATION [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 Towards spaceborne spotlight SAR, the antenna is regulated by the SAR system with specific regularity, so the shaking of the internal mechanism is inevitable. Moreover, external environment also has an effect on the stability of SAR platform.
X. Zhang +4 more
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Performance of UAV-to-Ground FSO Communications with APD and Pointing Errors
Applied System Innovation, 2021 Recently, a combination of unmanned aerial vehicles (UAVs) and free-space optics (FSO) has been investigated as a potential method for high data-rate front-haul communication links.
Ha Duyen Trung
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Measuring Antenna Elevation Mechanism Pointing Errors with Multiencoder Information Sources
Advances in Astronomy, 2023 There are many factors that cause pointing errors in radio telescopes. As one of the motion positioning mechanisms of the radio telescope, the error caused by the elevation mechanism cannot be ignored. The source of error in the elevation mechanism comes
Duoxiang Xu, Qian Xu, Na Wang, Fei Xue
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Terahertz Communications Between Unstable Transceivers With Pointing Errors Over FTR Fading
IEEE Open Journal of the Communications Society, 2023 Terahertz (THz) wireless communication has emerged as a promising technology for high-speed, ultra-broadband, and low-latency data transmission. However, the performance of THz systems is significantly affected by various channel and system parameters ...
Anil Yadav, Ranjan K. Mallik
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Maximum likelihood analysis of systematic errors in interferometric observations of the cosmic microwave background [PDF]
, 2013 We investigate the impact of instrumental systematic errors in interferometric measurements of the cosmic microwave background (CMB) temperature and polarization power spectra.
Andrei Korotkov +41 more
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New Results for the Pointing Errors Model in Two Asymptotic Cases
IEEE Photonics Journal, 2023 Several precise and computationally efficient results for pointing errors models in two asymptotic cases are derived in this paper. The normalized mean-squared error (NMSE) performance metric is employed to quantify the accuracy of different models.
Maoke Miao +3 more
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Results in Optics, 2021 Aperture averaging (AA) is a potential technique to reduce the effect of atmospheric turbulence in optical wireless communications (OWC). Although there is significant research on point-like detectors, there is a gap in the study on the analytical ...
Ziyaur Rahman +2 more
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Systematic Effects in Interferometric Observations of the CMB Polarization [PDF]
, 2013 The detection of the primordial $B$-mode spectrum of the polarized cosmic microwave background (CMB) signal may provide a probe of inflation. However, observation of such a faint signal requires excellent control of systematic errors.
Bunn, Emory F. +7 more
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