Results 71 to 80 of about 701,425 (185)
A Rapid Beam Pointing Determination and Beam-Pointing Error Analysis Method for a Geostationary Orbiting Microwave Radiometer Antenna in Consideration of Antenna Thermal Distortions. [PDF]
Sensors (Basel), 2021 Hu H, Tong X, Li H.
europepmc +1 more source
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
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.
core +1 more source
Tongxin xuebao, 2006 In order to study the performance of inter-satellite optical CDMA communication system, the influence of tracking and pointing error on the BER of this communication system was analyzed.
TAN Qing-gui, HU Yu, ZHAO Yue-ying
doaj +2 more sources
Comparison of direct and heterodyne detection optical intersatellite communication links [PDF]
The performance of direct and heterodyne detection optical intersatellite communication links are evaluated and compared. It is shown that the performance of optical links is very sensitive to the pointing and tracking errors at the transmitter and ...
Chen, C. C., Gardner, C. S.
core +1 more source
IRS-TR 12001: Spectral Pointing-Induced Throughput Error and Spectral Shape in Short-Low Order 1 [PDF]
, 2012 We investigate how the shape of a spectrum in the Short-Low module on the IRS varies with its overall throughput, which depends on how well centered a source is in the spectroscopic slit.
Ludovici, D., Sloan, G. C.
core
Wear consideration in gear design for space applications [PDF]
A procedure is described that was developed for evaluating the wear in a set of gears in mesh under high load and low rotational speed. The method can be used for any low-speed gear application, with nearly negligible oil film thickness, and is ...
Akin, Lee S., Townsend, Dennis P.
core +1 more source
The AIROscope pointing and stabilization system [PDF]
The AIROscope pointing and stabilization system is described. The system is configured with three gimbal axes and rate integrating gyro stabilization to provide a stable platform for infrared astronomy.
Lorell, K. R., Murphy, J. P.
core +1 more source
SensorsMany medical conditions impair proprioception but there are few easy-to-deploy technologies for assessing proprioceptive deficits. Here, we developed a method—called “OpenPoint”—to quantify upper extremity (UE) proprioception using only a webcam as the ...
Guillem Cornella-Barba +5 more
doaj +1 more source