Results 31 to 40 of about 560,529 (289)
Sensors, 2023 Star images from star trackers are usually defocused to capture stars over an exposure time for better centroid measurements. While a satellite is maneuvering, the star point on the screen of the camera is affected by the satellite, which results in the ...
Taeho Kim +3 more
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Universal Verification Platform and Star Simulator for Fast Star Tracker Design
Sensors, 2021 Developing star trackers quickly is non-trivial. Achieving reproducible results and comparing different algorithms are also open problems. In this sense, this work proposes the use of synthetic star images (a simulated sky), allied with the standardized ...
Victor Hugo Schulz +8 more
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Consideration on Actualizing the Non-Dimensional Star Pattern Recognition Algorithm for a Typical Laboratory Star Tracker [PDF]
فصلنامه علوم و فناوری فضایی, 2012 Star trackers are one of the most accurate attitude determination devices of a spacecraft. Star trackers are able to determine the spacecraft attitude with the use of recognizing the stars within their field of view.
Jafar Roshanian +3 more
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Nature, 2013 As an early adopter of astronomical technology, Andrea Ghez is revealing secrets about the giant black hole at the Galaxy's centre.
openaire +1 more source
Characterization of Chromatic Effects in Small Star Trackers [PDF]
, 2016 This paper explores how star color affects the design, calibration, and operation of star trackers. We develop a series of tools that characterize the chromatic performance of a star tracker and suggest how this information can be used in the design (e.g.
Sinclair, Doug +2 more
core +1 more source
ATTITUDE RESTITUTION FOR MULTISPECTRAL EARTH OBSERVATION SATELLITE USING SPACE TRIANGULATION TECHNIQUE [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020 Earth observation satellites are equipped with navigation components (star trackers, gyroscopes) which estimates the attitude of the satellite, corresponding to its orientation in the orbital reference frame.
N. Bernardini, R. Binet, B. Vidal
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Optimization of star research algorithm for esmo star tracker [PDF]
, 2011 This paper explains in detail the design and the development of a software research star algorithm, embedded on a star tracker, by the ISAE/SUPAERO team. This research algorithm is inspired by musical techniques.
Fabacher, Emilien +5 more
core
High-Fidelity Star Simulator for Cameras and Star Trackers [PDF]
, 2023 LAUREA MAGISTRALEL'adozione di star tracker negli ultimi anni si sta estendendo anche ai CubeSat e SmallSat, grazie alle dimensioni compatte e alla loro capacità di determinare l’assetto con elevata precisione.
Gravina, Davide
core
Global Efforts to Reduce Paediatric Cancer Care Disparities in Radiotherapy: A Decade Change
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background We present an update on the status, needs and challenges faced by paediatric imaging and radiotherapy (RT) programmes globally after a previous survey conducted by the International Atomic Energy Agency (IAEA) 10 years prior. Methods We developed and distributed a 121‐question survey to radiation oncologists, medical physicists and ...
Raymond B. Mailhot Vega +10 more
wiley +1 more source
Selection of Design Parameters in Optical System of Star Tracker for a Satellite [PDF]
Journal of Astronomy and Space Sciences, 1999 In order to develop star trackers for a satellite in our country we studied selection procedure of optical parameters. For logical selection of the optical parameters, we simulated the entire processes in which star lights imaged on a CCD sensor were ...
Ja-Kyung Nah, Yong Ha Kim, Yu Yi
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