Results 31 to 40 of about 2,173,291 (371)
Centroid error compensation method for a star tracker under complex dynamic conditions
, 2017 The traditional approach of a star tracker for reducing the dynamic error concentrates on a single frame of star images. Through correlating adjacent star images together with their angular relations sensed by a gyroscope unit (GU), the attitude ...
Wenfeng Tan +8 more
openalex +2 more sources
DETECTION OF THE ANGLE CHANGE BETWEEN CAMERA AND STAR TRACKER BASED ON STAR OBSERVATION [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022 Satellites in orbit are affected by changes in thermal environment and other factors, and the angle of optical axis between the camera and star tracker (Cam-ST) changes.
Z. Guan +6 more
doaj +1 more source
Computing the Installation Error between Star Tracker and Fiber Optic Gyroscope [PDF]
علوم، فناوری و کاربردهای فضایی, 2023 Star tracker is one of the most important devices used on satellites for attitude determination. Since its output is discontinuous, it needs a complementary unit to cover its discontinuities.
Elham Kowsari, Hadi Makarem
doaj +1 more source
AI-Based Real-Time Star Tracker
Electronics, 2023 Many systems on Earth and in space require precise orientation when observing the sky, particularly for objects that move at high speeds in space, such as satellites, spaceships, and missiles.
G. Carmeli, Boaz Ben-Moshe
semanticscholar +1 more source
Resilient Star Tracker Algorithms
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States) +2 more
openalex +3 more sources
Modification and hardware implementation of star tracker algorithms
SN Applied Sciences, 2019 M. Hashemi +2 more
semanticscholar +3 more sources
On-Orbit Geometric Distortion Correction on Star Images through 2D Legendre Neural Network
Remote Sensing, 2022 The star tracker is a prerequisite device to realize high-precision attitude determination for a spacecraft. However, due to the errors in optical lens machining, optical path assembly, and temperature alternation, optical instruments suffer from some ...
Chenguang Shi +3 more
doaj +1 more source
Stratospheric temperature measurements from nanosatellite stellar occultation observations of refractive bending [PDF]
Atmospheric Measurement Techniques, 2023 Stellar occultation observations from space can probe the stratosphere and mesosphere at a fine vertical scale around the globe. Unlike other measurement techniques like radiosondes and aircraft, stellar occultation has the potential to observe the ...
D. L. McGuffin +8 more
doaj +1 more source
Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems (Cat.No.CH37144), 2002 Describes the Intelligent Star Tracker System. The Intelligent Star Tracker System incorporates an adaptive optic catadioptric telescope in a silicon carbide housing. Leveraging off of the active optic technologies, the novel active pixel position sensors (APPS) enable wide dynamic range and allow simultaneous imagery of faint and bright stars in a ...
N. Clark, P. Furth
openaire +3 more sources
Space Debris Detection and Positioning Technology Based on Multiple Star Trackers
Applied Sciences, 2022 This paper focuses on the opportunity to use multiple star trackers to help space situational awareness and space surveillance. Catalogs of space debris around Earth are usually based on ground-based measurements, which rely on data provided by ground ...
Meiying Liu +7 more
doaj +1 more source