Results 61 to 70 of about 533,452 (194)
Normal manual straight ahead pointing in Complex Regional Pain Syndrome.
PLoS ONE, 2021 There is evidence to suggest that people with Complex Regional Pain Syndrome (CRPS) can have altered body representations and spatial cognition. One way of studying these cognitive functions is through manual straight ahead (MSA) pointing, in which ...
Axel D Vittersø +5 more
doaj +1 more source
Antenna pointing systematic error model derivations [PDF]
The pointing model used to represent and correct systematic errors for the Deep Space Network (DSN) antennas is presented. Analytical expressions are given in both azimuth-elevation (az-el) and hour angle-declination (ha-dec) mounts for RF axis ...
Guiar, C. N., Lansing, F. L., Riggs, R.
core +1 more source
Scientific ReportsReflector antenna has been widely used in deep space exploration, radar warning, and other fields, all of which requires high pointing accuracy. The antenna elevation bearings are the key component that guarantees its pointing accuracy, while any ...
Lihui Chen +5 more
doaj +1 more source
Mixed mmWave RF/FSO Relaying Systems Over Generalized Fading Channels With Pointing Errors
IEEE Photonics Journal, 2017 This paper studies the performance of mixed millimeter-wave radio-frequency (mmWave RF), free-space optics (FSO) systems in a highly scalable and cost-effective solution for fifth-generation (5G) mobile backhaul networks.
Phuc V. Trinh +2 more
doaj +1 more source
Measurement of Antenna Surfaces from In- and Out-Of-Focus Beam Maps using Astronomical Sources [PDF]
, 2006 We present a technique for the accurate estimation of large-scale errors in an antenna surface using astronomical sources and detectors. The technique requires several out-of-focus images of a compact source and the signal-to-noise ratio needs to be good
Anderson +8 more
core +2 more sources
The Entire Virial Radius of the Fossil Cluster RXJ1159+5531: I. Gas Properties [PDF]
, 2015 Previous analysis of the fossil-group/cluster RXJ1159+5531 with X-ray observations from a central Chandra pointing and an offset-North Suzaku pointing indicate a radial intracluster medium (ICM) entropy profile at the virial radius ($R_{\rm vir ...
Brighenti, Fabrizio +3 more
core +2 more sources
The pointing errors of geosynchronous satellites [PDF]
A study of the correlation between cloud motion and wind field was initiated. Cloud heights and displacements were being obtained from a ceilometer and movie pictures, while winds were measured from pilot balloon observations on a near-simultaneous basis.
Das, A., Sikdar, D. N.
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Beam squint and Stokes V with off-axis feeds
, 2008 Radio telescopes with off-axis feeds, such as the (E)VLA, suffer from "beam squint" in which the two orthogonal circular polarizations sampled have different pointing centers on the sky.
Cotton, W. D., Uson, Juan M.
core +1 more source
Statistical and systematic uncertainties in pixel-based source reconstruction algorithms for gravitational lensing [PDF]
, 2014 Gravitational lens modeling of spatially resolved sources is a challenging inverse problem with many observational constraints and model parameters.
Keeton, Charles, Tagore, Amitpal
core +1 more source
Outage Probability of Mixed THz-UWOC Transmission Systems With Hardware Impairments
IEEE AccessIn this paper, we propose a mixed dual-hop communication system consisting of terahertz/underwater wireless optical communication (THz-UWOC) links with hardware impairments. In particular, considering the heterodyne detection, we assume that the THz link
Shenghai Chen, Lili Wan, Xianwu Mi
doaj +1 more source