Results 31 to 40 of about 2,667,877 (264)

Study on the method of precision adjustment of star sensor

Nanotechnology and Precision Engineering, 2018
Star sensors are indispensable spatial measurement sensors for high-resolution earth observation and astronomical observations, and the demand for high measurement accuracy of satellite sensors continues to increase; thus, the star sensor optical machine
Xiaoyan Wang, Ran Zheng, Yanpeng Wu, Jianbo Sun, Jun Zhong, Long Wang, Miaomiao Wang   +6 more
doaj   +1 more source

HARMONI at ELT: designing a laser guide star wavefront sensors for the ELT [PDF]

Astronomical Telescopes + Instrumentation, 2022
HARMONI is the first light visible and near-IR integral field spectrograph for the ELT covering a large spectral range from 450nm to 2450nm with resolving powers from 3500 to 18000 and spatial sampling from 60mas to 4mas.
A. Costille, A. Bonnefoi, E. Renault, W. Ceria, K. Dohlen, B. Neichel, Z. Hubert, J. Correia, T. Moulin, Saúl Menéndez Mendoza, T. Fusco, Felipe Pedreros Bustos, P. Jouve, K. El Hadi, S. Barboza, R. Rohloff, F. Müller, F. Clarke, H. Schnetler, D. Melotte, N. Thatte   +20 more
semanticscholar   +1 more source

Processing Centroids of Smearing Star Image of Star Sensor [PDF]

Mathematical Problems in Engineering, 2014
A novel method was presented for increasing the accuracy of subpixel centroid estimation for smearing star image. Model of the smearing trajectory of smearing star was built. It helped to study the analytical form of the errors, caused by image smearing, for centroid estimation.
Yufu Liao, Enhai Liu, Jianyong Zhong, Hui Zhang   +3 more
openaire   +1 more source

Efficient Star Identification Using a Neural Network

Sensors, 2020
The required precision for attitude determination in spacecraft is increasing, providing a need for more accurate attitude determination sensors.
David Rijlaarsdam, Hamza Yous, Jonathan Byrne, Davide Oddenino, Gianluca Furano, David Moloney   +5 more
doaj   +1 more source

Penerapan Algoritma A-Star Sebagai Pencari Rute Terpendek pada Robot Hexapod

Jurnal Nasional Teknik Elektro, 2018
A-Star is a path finding algorithm that combine Uniform Cost Search and Greedy-Best First Search. Uniform Cost Search will choose the smallest cost from start to goal, while Greedy-Best First Search uses a heuristic function to estimate the cost required
Dedy Hermanto, Sepri Dermawan
doaj   +3 more sources

Star Trackers Evaluation by Statistical Analysis [PDF]

فناوری در مهندسی هوافضا
A comprehensive statistical analysis and comparison on the characteristics of star trackers used in the world can provide valuable information to researchers, manufacturers and customers in this field.
Mohammad Sajjad Mahdiyari, Mehran Nosratollahi, Reza Zardashti   +2 more
doaj   +1 more source

Space Debris Observation Using Star Sensors Based on Scanning Circle Model

IEEE Access
With the large-scale deployment of mega-constellations, the number of on-orbit star sensors is rapidly increasing. Building on the advancements in star sensor detection capabilities, this paper proposes utilizing star sensors as dual-purpose sensors to ...
Fei Feng, Xia Wang, Wei Qi, Huisheng Yao, Zeyu Dong   +4 more
doaj   +1 more source

Optical Parameters Optimization for All-Time Star Sensor

Sensors, 2019
As an important development direction of star sensor technology, the All-Time star sensor technology can expand the application of star sensors to flight platforms inside the atmosphere. Due to intense atmospheric background radiation during the daytime,
Wenjie Wang, Xinguo Wei, Jian Li, Jingyuan Du, Guangjun Zhang   +4 more
doaj   +1 more source

Development and validation of full-field simulation imaging technology for star sensors under hypersonic aero-optical effects.

Optics Express
Hypersonic vehicles equipped with star sensors operating in near-space environments experience aero-optical effects caused by the surrounding high-temperature and high-pressure flow fields.
Haonan Liu, Ting Sun, Siyao Wu, Kang Yang, Baosen Yang, Guoteng Ren, Jiahui Song, Guanwen Li   +7 more
semanticscholar   +1 more source

A new star (sensor) is born [PDF]

International Conference on Space Optics — ICSO 2010, 2017
In the frame of the Dutch Prequalification for ESA Programs(PEP), as part of the efforts to design an integrated optical attitude control subsytem (IOPACS), a consortium of TNO and several SME's in the Netherlands have been working on a novel type of startracker called MABS (Multiple Aperture Baffled Startracker).
Leijtens, J., Vliegenthart, W., Lampridis, D., Vacanti, G., Monna, B., Bechthum, E., Hagenaars, K., Heide, E. van der, Kruijff, M., Breukelen, E. van, Lemair, A.   +10 more
openaire   +2 more sources