Results 41 to 50 of about 701,425 (185)
Applications of inertial-sensor high-inheritance instruments to DSN precision antenna pointing [PDF]
, 1992 Laboratory test results of the initialization and tracking performance of an existing inertial-sensor-based instrument are given. The instrument, although not primarily designed for precision antenna pointing applications, demonstrated an on-average 10 ...
Goddard, R. E.
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AN EMPRICAL POINT ERROR MODEL FOR TLS DERIVED POINT CLOUDS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 Abstract. The random error pattern of point clouds has significant effect on the quality of final 3D model. The magnitude and distribution of random errors should be modelled numerically. This work aims at developing such an anisotropic point error model, specifically for the terrestrial laser scanner (TLS) acquired 3D point clouds. A priori precisions
Ozendi, Mustafa +2 more
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Mixed FSO/RF Based Multiple HAPs Assisted Multiuser Multiantenna Terrestrial Communication
Frontiers in Communications and Networks, 2022 In this work, a mixed free-space optics (FSO)/radio-frequency (RF) based multiple serial high altitude platforms (HAPs) assisted multiuser multiantenna terrestrial communication system is considered.
Praveen Kumar Singya +1 more
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Experimental characterization of a 400 Gbit/s orbital angular momentum multiplexed free-space optical link over 120 m [PDF]
, 2016 We experimentally demonstrate and characterize the performance of a 400-Gbit/s orbital angular momentum (OAM) multiplexed free-space optical link over 120- meters on the roof of a building.
Ahmed, Nisar +17 more
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A high-resolution pointing system for fast scanning platforms: The EBEX example
, 2016 The E and B experiment (EBEX) is a balloon-borne telescope designed to measure the polarization of the cosmic microwave background with 8' resolution employing a gondola scanning with speeds of order degree per second.
Aboobaker, Asad +14 more
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Error bounds on complex floating-point multiplication [PDF]
Mathematics of Computation, 2007 Given floating-point arithmetic with $t$-digit base-$\beta$ significands in which all arithmetic operations are performed as if calculated to infinite precision and rounded to a nearest representable value, we prove that the product of complex values $z_0$ and $z_1$ can be computed with maximum absolute error $\abs{z_0} \abs{z_1} \frac{1}{2} \beta^{1 -
Brent, Richard +2 more
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IEEE Access, 2020 The online monitoring of pointing error (PE) caused by the main reflector (MR) deformation under wind disturbance has become a knotty problem for large reflector antennas.
Wei Liang, Jin Huang, Jie Zhang
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Amplitude and direction errors in kinesthetic pointing [PDF]
Experimental Brain Research, 2004 We investigated the accuracy with which, in the absence of vision, one can reach again a 2D target location that had been previously identified by a guided movement. A robotic arm guided the participant's hand to a target (locating motion) and away from it (homing motion). Then, the participant pointed freely toward the remembered target position.
BAUD BOVY , GABRIEL, VIVIANI P.
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An interferometer based phase control system [PDF]
, 1980 An interferometer based phase control system for focusing and pointing the solar power satellite (SPS) power beam is discussed. The system is ground based and closed loop. One receiving antenna is required on Earth.
Ott, J. H., Rice, J. S.
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