Results 31 to 40 of about 1,366,151 (284)

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

Star Recognition Based on Path Optimization in Star Sensor with Multiple Fields of View

Advances in Astronomy, 2018
Star sensors make use of astronomical information in stars to determine attitude for spacecrafts by star image recognition. For low-cost star sensors with small field of view, fusion of observed images from multiple fields of view is performed and a ...
Di Jiang, Ke Zhang, Olivier Debeir
doaj   +1 more source

A Star Sensor On-Orbit Calibration Method Based on Singular Value Decomposition

Sensors, 2019
The navigation accuracy of a star sensor depends on the estimation accuracy of its optical parameters, and so, the parameters should be updated in real time to obtain the best performance. Current on-orbit calibration methods for star sensors mainly rely
Liang Wu, Qian Xu, Janne Heikkilä, Zijun Zhao, Liwei Liu, Yali Niu   +5 more
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Impact of proton radiation and annealing of CMOS image sensors on star sensor performance

AIP Advances
Star sensors play a crucial role as high-precision optical attitude navigation devices in satellite attitude control systems. The CMOS image sensor is an important component of the imaging system of the star sensor and experiences performance degradation
Yi-Hao Cui, Jie Feng, Yu-Dong Li, Bingkai Liu, Lin Wen, Qi Guo   +5 more
doaj   +1 more source

A Voting-Based Star Identification Algorithm Using a Partitioned Star Catalog

Applied Sciences
With the rapid advancement of aerospace technology, the maneuverability of spacecraft has increasingly improved, creating a pressing demand for star sensors with a high attitude update rate and high precision. Star identification, as the most complex and
Xu He, Lei Zhang, Jiawei He, Zhiya Mu, Zhuang Lv, Jun Wang   +5 more
doaj   +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

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan, Michael Abele, Calogero Virgone, Michaela Kuhlen, Ricardo Lopez‐Almarez, Tal Ben‐Ami, Ewa Bien, Maja Cesen, Malgorzata A. Krawczyk, Andrea Ferrari, Gianni Bisogno, Yves Reguerre, Dominik T. Schneider, Louise Galmiche, Jorg Fuchs, Sarah Braungart, Bilgehan Yalcin, Ines B. Brecht, Daniel Orbach   +18 more
wiley   +1 more source