Results 21 to 30 of about 547,647 (206)

Age-related differences in pointing accuracy in familiar and unfamiliar environments [PDF]

, 2015
This study aimed to investigate age-related differences in spatial mental representations of familiar and unfamiliar places. Nineteen young adults (aged 18\u201323) and 19 older adults (aged 60\u201374), all living in the same Italian town, completed a ...
De Beni, R., Della Giustina, M., Meneghetti, C., Muffato, V.   +3 more
core   +1 more source

Accuracy of Point Precipitation Measurements

Hydrology Research, 1980
The normal-exposed Hellmann raingauge only catches about 85% of the true precipitation on yearly basis. This is mainly due to aerodynamic effects. A statistical model analysing the ratio of the daily amounts of precipitation measured at ground level and at standard height is set up for describing this influence.
Henning Madsen, Peter Allerup
openaire   +1 more source

Design and Evaluation on Onboard Antenna Pointing Control System for a Wireless Relay System Using Fixed-Wing UAV

Aerospace, 2023
Among several usages of unmanned aerial vehicles (UAV), wireless relay systems for high altitudes using fixed-wing UAVs, or high-altitude platform stations (HAPS), are some of the most promising applications.
Koki Hamajima, Kei Yasukawa, Masazumi Ueba, Hisayoshi Kanou, Munehiro Matsui, Junichi Abe, Kiyohiko Itokawa, Fumihiro Yamashita   +7 more
doaj   +1 more source

Inverse Solution Error Analysis and Correction of Beam Steering System Based on Risley Prisms

Applied Sciences, 2022
The pointing accuracy of the Risley prisms beam-steering system mainly depends on the accuracy of the solution method and the impact of the error on the solution.
Yinuo Song, Shijie Gao, Jiabin Wu, Shuaifei Wang, Li Huo   +4 more
doaj   +1 more source

BLAST Autonomous Daytime Star Cameras [PDF]

, 2006
We have developed two redundant daytime star cameras to provide the fine pointing solution for the balloon-borne submillimeter telescope, BLAST. The cameras are capable of providing a reconstructed pointing solution with an absolute accuracy < 5 ...
Chapin, Edward, Devlin, Mark J., Gundersen, Joshua, Klein, Jeff, Pascale, Enzo, Rex, Marie, Wiebe, Donald   +6 more
core   +2 more sources

Specificity and coherence of body representations [PDF]

, 2009
Bodily illusions differently affect body representations underlying perception and action. We investigated whether this task dependence reflects two distinct dimensions of embodiment: the sense of agency and the sense of the body as a coherent whole.
Dijkerman, H.C., Haggard, P., Kammers, M.P.M., Longo, Matthew R., Tsakiris, M.   +4 more
core   +1 more source

A Simplified Pointing Model for Alt-Az Telescopes

Applied Sciences, 2023
The telescope pointing model plays a crucial role in characterizing and explaining the inaccuracies in the telescope’s pointing. It uses mathematical models to express these errors and suggests methods to calibrate and rectify them.
Yong Zhao, Yingqiang Wang, Fei He, Zhonghua Yao, Zhaojin Rong, Yong Wei   +5 more
doaj   +1 more source

Analysis of Field of View for a Moon-Based Earth Observation Multispectral Camera

Sensors
A Moon-based Earth observation multispectral camera provides a unique perspective for observing large-scale Earth phenomena. This study focuses on the analysis of the field of view (FOV) for such a sensor.
Zhitong Yu, Hanlin Ye, Mengxiong Zhou, Feifei Li, Yin Jin, Chunlai Li, Guang Liu, Huadong Guo   +7 more
doaj   +1 more source

Data Processing Pipeline for Pointing Observations of Lunar-based Ultraviolet Telescope [PDF]

, 2015
We describe the data processing pipeline developed to reduce the pointing observation data of Lunar-based Ultraviolet Telescope (LUT), which belongs to the Chang'e-3 mission of the Chinese Lunar Exploration Program.
Cai, Hong-Bo, Cao, Li, Deng, Jin-Song, Han, Xu-Hui, Meng, Xian-Min, Qiu, Yu-Lei, Wang, Jing, Wei, Jian-Yan, Wu, Chao, Xin, Li-Ping   +9 more
core   +2 more sources

Research on the Initial Orientation Technology of the View Axis for Underwater Laser Communication Dynamic Platforms Based on Coordinate Transformation Matrix Positioning Model

Photonics
To address the challenge of directly applying space laser communication systems to dynamic underwater environments, this paper integrates coordinate transformation matrices with underwater positioning systems, proposing an ultra-short baseline (USBL ...
Jun Ma, Yunjie Teng, Yang Liu, Mingyang Zhang, Cheng Qiu, Hao Qin, Yanpu Li   +6 more
doaj   +1 more source