Results 31 to 40 of about 1,728 (284)
An Evaluation of Low-Cost Vision Processors for Efficient Star Identification
Sensors, 2020 Star trackers are navigation sensors that are used for attitude determination of a satellite relative to certain stars. A star tracker is required to be accurate and also consume as little power as possible in order to be used in small satellites.
Surabhi Agarwal +5 more
doaj +1 more source
Star Identification and Attitude Determination With Projective Cameras
IEEE Access, 2021 Images of starfields collected by a projective camera are useful for a variety of scientific and engineering purposes. This utility is exemplified by star trackers, which are amongst the most commonly used sensors for determining the attitude of modern ...
John A. Christian, John L. Crassidis
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
Fast and robust star detection algorithm based on the dyadic wavelet transform
IET Image Processing, 2023 Star detection is an important part of the spacecraft attitude determination performed by star trackers. The current advanced star detection algorithms can effectively extract star points in complex backgrounds.
Zhanglei Chen +3 more
doaj +1 more source
Remote Sensing, 2022 The rolling shutter effect decreases the accuracy of the attitude measurement of star trackers when they work in rolling shutter exposure mode, especially under dynamic conditions.
Zongqiang Fu +6 more
doaj +1 more source
Design and Simulation of a High-Speed Star Tracker for Direct Optical Feedback Control in ADCS
Sensors, 2020 Star Trackers are often the most accurate instrument in an Attitude Determination and Control Systems, but often present a slow update rate, requiring additional sensor and sensor fusion algorithms to provide a smoother and faster output.
Mikaël Marin, Hyochoong Bang
doaj +1 more source
Payload Camera Breadboard for Space Surveillance—Part I: Breadboard Design and Implementation
Applied Sciences, 2023 The rapid increase of space debris poses a risk to space activities, so it is vital to develop countermeasures in terms of space surveillance to prevent possible threats.
Joel Filho +4 more
doaj +1 more source
A heavy flavor tracker for STAR [PDF]
Nuclear Physics A, 2006 proceedings of the Quark Matter 2005 Conference, Budapest, Hungary; to appear in Nucl. Phys.
openaire +2 more sources
Star Trackers Evaluation by Statistical Analysis [PDF]
فناوری در مهندسی هوافضاA 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 +2 more
doaj +1 more source
Design and Validation of a U-Net-Based Algorithm for Star Sensor Image Segmentation
Applied Sciences, 2023 The present work focuses on the investigation of an artificial intelligence (AI) algorithm for brightest objects segmentation in night sky images’ field of view (FOV).
Marco Mastrofini +2 more
doaj +1 more source