Results 1 to 10 of about 2,667,778 (165)
Star Centroiding Based on Fast Gaussian Fitting for Star Sensors [PDF]
Sensors, 2018 The most accurate star centroiding method for star sensors is the Gaussian fitting (GF) algorithm, because the intensity distribution of a star spot conforms to the Gaussian function, but the computational complexity of GF is too high for real-time ...
Xiaowei Wan +4 more
doaj +8 more sources
An Optical System of Star Sensors with Accuracy Performance Varying with the Field of View [PDF]
Sensors, 2023 The field of view and single-star measurement accuracy are crucial metrics for assessing the performance of a star sensor. The field of view determines the spatial range of stars that can be captured by the sensor, while the single-star measurement ...
Xiaoheng Wang +3 more
doaj +5 more sources
Self-Calibration for Star Sensors [PDF]
SensorsAiming to address the chicken-and-egg problem in star identification and the intrinsic parameter determination processes of on-orbit star sensors, this study proposes an on-orbit self-calibration method for star sensors that does not depend on star ...
Jingneng Fu, Ling Lin, Qiang Li
doaj +5 more sources
Star Identification Based on Multilayer Voting Algorithm for Star Sensors [PDF]
Sensors, 2021 This paper describes the multilayer voting algorithm, a novel autonomous star identification method for spacecraft attitude determination. The proposed algorithm includes two processes: an initial match process and a verification process.
Meiying Liu +3 more
doaj +6 more sources
Sieve Search Centroiding Algorithm for Star Sensors [PDF]
Sensors, 2023 The localization of the center of the star image formed on a sensor array directly affects attitude estimation accuracy. This paper proposes an intuitive self-evolving centroiding algorithm, termed the sieve search algorithm (SSA), which employs the ...
Vivek Chandran Karaparambil +2 more
doaj +5 more sources
Blurred Star Image Processing for Star Sensors under Dynamic Conditions [PDF]
Sensors, 2012 The precision of star point location is significant to identify the star map and to acquire the aircraft attitude for star sensors. Under dynamic conditions, star images are not only corrupted by various noises, but also blurred due to the angular rate ...
Lei Guo, Weina Zhang, Wei Quan
doaj +7 more sources
High Update Rate Attitude Measurement Method of Star Sensors Based on Star Point Correction of Rolling Shutter Exposure [PDF]
Sensors, 2021 Attitude update rate is one of the important indicators of star sensor performance. In order to resolve the problem of the low attitude update rate of star sensors, this paper proposes a star sensor attitude update method based on star point correction ...
Longdong He +4 more
doaj +3 more sources
A High-Accuracy Star Centroid Extraction Method Based on Kalman Filter for Multi-Exposure Imaging Star Sensors [PDF]
Sensors, 2023 A multi-exposure imaging approach proposed in earlier studies is used to increase star sensors’ attitude update rate by N times. Unfortunately, serious noises are also introduced in the star image due to multiple exposures.
Wenbo Yu, Hui Qu, Yong Zhang
doaj +3 more sources
A Fast Star Identification Algorithm of Star Sensors in the LIS Mode
Remote Sensing, 2022 In the South Atlantic Anomaly (SAA) area, due to the influence of transient noise caused by space radiation, a star sensor can easily stay in the lost-in-space (LIS) mode for a long time.
Kaili Lu +4 more
doaj +3 more sources
Remote Sensing, 2020 Owing to the vibrations and thermal shocks that arise during the launch and orbit penetration process, the on-orbit installation parameters of multiple star sensors are different from the on-ground measured parameters, causing inconsistencies in the ...
Yanli Wang, Mi Wang, Ying Zhu
doaj +4 more sources