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
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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 +7 more sources
Simulation of Dense Star Map in Deep Space Based on Gaia Catalogue [PDF]
SensorsHigh-fidelity star field simulation is paramount for target detection and space situational awareness (SSA) in geostationary and deep-space environments.
Puzhen Li +3 more
doaj +2 more sources
IEEE Access, 2019 Extracting accurate star centroids in the observed star images is one of the key problems for image navigation of the geosynchronous interferometric infrared sounder (GIIRS) of Fengyun-4A Satellite (FY-4A), the first scientific experimental satellite of ...
Haopeng Zhang +8 more
doaj +3 more sources
Celestial Object Imaging Model and Parameter Optimization for an Optical Navigation Sensor Based on the Well Capacity Adjusting Scheme [PDF]
Sensors, 2017 The simultaneous extraction of optical navigation measurements from a target celestial body and star images is essential for autonomous optical navigation.
Hao Wang, Jie Jiang, Guangjun Zhang
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Development of Daytime Observation Model for Star Sensor and Centroiding Performance Analysis [PDF]
Journal of Astronomy and Space Sciences, 2005 A star sensor daytime observation model is developed in order to test the performance of the star sensor useful for daylight application. The centroid errors of the star sensor in the day time application are computed by using the model.
Jakyoung Nah, Yu Yi, Yong Ha Kim
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Exposure Time Optimization for Highly Dynamic Star Trackers [PDF]
Sensors, 2014 Under highly dynamic conditions, the star-spots on the image sensor of a star tracker move across many pixels during the exposure time, which will reduce star detection sensitivity and increase star location errors.
Xinguo Wei +3 more
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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
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The Measurement of PSF Ellipticity of an Unobstructed Off-Axis Space Telescope: Error Analysis
IEEE Access, 2021 It is an effective method to detect weak gravitational lensing (WL) in the universe by measuring ellipticities of galaxies via astronomical telescopes. Optical properties of telescopes are critical to WL detections.
Kuo Fan +4 more
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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 +3 more
openaire +1 more source