Results 81 to 90 of about 533,452 (194)
Field Evaluation of Sounding Accuracy in Deep Water Multibeam Swath Bathymetry [PDF]
, 2001 A new Kongsberg-Simrad EM120 multibeam echo-sounder has been installed aboard Scripps Institution of Oceanography\u27s Research Vessel Roger Revelle in January 2001.
de Moustier, Christian
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A generic point error model for TLS derived point clouds
SPIE Proceedings, 2017 This work aims at developing a generic and anisotropic point error model, which is capable of computing magnitude and direction of a priori random errors, described in the form of error ellipsoids for each individual point of the cloud. The direct TLS observations are the range (ρ), vertical (α) and horizontal (θ) angles, each of which is in fact ...
Ozendi, Mustafa +2 more
openaire +4 more sources
A novel testing method of beam pointing accuracy for high-power laser facility
Nuclear Engineering and TechnologyPointing shots are typically used to test the beam pointing accuracy of high-power laser facilities. This paper proposes a new method for measuring pointing accuracy by utilizing visible light generated during the low-energy laser interaction with a test
Xiaolu Zhang +9 more
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CORRELATED ERRORS IN EARTH POINTING MISSIONS [PDF]
Two different Earth-pointing missions dealing with attitude control and dynamics changes illustrate concerns with correlated error sources and coupled effects that can occur. On the OrbView-2 (OV-2) spacecraft, the assumption of a nearly-inertially-fixed
Bilanow, Steve, Patt, Frederick S.
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In-flight calibration of the high-gain antenna pointing for the Mariner Venus-Mercury 1973 spacecraft [PDF]
The methods used to in-flight calibrate the pointing direction of the Mariner Venus-Mercury 1973 spacecraft high gain antenna and the achieved antenna pointing accuracy are described.
Hardman, J. M. +2 more
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Statistics of the radiated field of a space-to-earth microwave power transfer system [PDF]
Statistics such as average power density pattern, variance of the power density pattern and variance of the beam pointing error are related to hardware parameters such as transmitter rms phase error and rms amplitude error.
Leininger, G., Stevens, G. H.
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Performance of RSMA-Based UOWC Systems Over Oceanic Turbulence Channel With Pointing Errors
IEEE Open Journal of the Communications SocietyUnderwater optical wireless communication (UOWC) systems face significant challenges due to oceanic turbulence and pointing errors (PE), which can degrade system performance. Moreover, interference is another challenge in UOWC, considering the consistent
Ziyaur Rahman +2 more
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IEEE Photonics JournalOrbital Angular Momentum (OAM)-based Free-Space Optical (FSO) communication systems offer immense potential for high-capacity, secure links, but their performance is highly sensitive to pointing errors. This paper provides a comprehensive analysis of OAM
Mohammad Taghi Dabiri +2 more
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Pointing-error simulations of the DSS-13 antenna due to wind disturbances [PDF]
Accurate spacecraft tracking by the NASA Deep Space Network (DSN) antennas must be assured during changing weather conditions. Wind disturbances are the main source of tracking errors. The development of a wind-force model and simulations of wind-induced
Bienkiewicz, B. +2 more
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