Results 31 to 40 of about 5,336,206 (299)
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
semanticscholar +1 more source
BMC Genomics, 2017 Background Influenza A virus (IAV) is a major public health concern, being responsible for the death of approximately half a million people each year.
Biruhalem Taye +5 more
doaj +1 more source
Weak Spatial Target Extraction Based on Small-Field Optical System
Sensors, 2023 Compared to wide-field telescopes, small-field detection systems have higher spatial resolution, resulting in stronger detection capabilities and higher positioning accuracy.
Xuguang Zhang +3 more
doaj +1 more source
Real-Time Convolutional-Neural-Network-Based Star Detection and Centroiding Method for CubeSat Star Tracker [PDF]
IEEE Transactions on Aerospace and Electronic SystemsStar trackers are one of the most accurate celestial sensors used for absolute attitude determination. The devices detect stars in captured images and accurately compute their projected centroids on an imaging focal plane with subpixel precision ...
Hongrui Zhao +4 more
semanticscholar +1 more source
Ground Testing Strategies for Verifying the Slew Rate Tolerance of Star Trackers
Sensors, 2014 The performance of a star tracker is largely based on the availability of its attitude solution. Several methods exist to assess star tracker availability under both static and dynamic imaging conditions.
Tom Dzamba, John Enright
doaj +1 more source
Detection of the Secondary Star in X1822-371 [PDF]
International Astronomical Union Colloquium, 1996 AbstractWe have detected He I absorption from the companion star to X1822–371 and find a lower limit to its K–velocity of 230±50km s−1. We interpret the He I as arising on the X-ray heated inner face of the companion star.
E. T. Harlaftis, P. A. Charles, K. Horne
openaire +1 more source
Detection of the binarity of the star J1158+4239 [PDF]
Astronomy Letters, 2016 One of the goals of the Pulkovo program of research on stars with large proper motions is to reveal among the low-luminosity stars those that have evidence of binarity. Twelve astrometric binary candidates from the Pulkovo list have been included in the program of speckle observations with the BTA telescope at the Special Astrophysical Observatory of ...
Khovritchev, M. Yu. +9 more
openaire +2 more sources
DeepStar: Detecting Starring Characters in Movies [PDF]
IEEE Access, 2019 Recent advances in the film industry have given rise to exponential growth in movie/drama production and adaptation of the Big Data concept. Automatic identification and classification of movie characters have received tremendous attention from researchers due to its applications in video semantic analysis, video summarization, and personalized video ...
Ijaz Ul Haq +3 more
openaire +2 more sources
Simultaneously Transmitting and Reflecting RIS (STAR-RIS) Assisted Multi-Antenna Covert Communication: Analysis and Optimization [PDF]
IEEE Transactions on Wireless Communications, 2023 This paper investigates the multi-antenna covert communications assisted by a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS).
Han Xiao +6 more
semanticscholar +1 more source
Rotational-Shearing-Interferometer Response for a Star-Planet System without Star Cancellation
Applied Sciences, 2021 The Rotational Shearing Interforometer has been proposed for direct detection of extra-solar planets. This interferometer cancels the star radiation using destructive interference.
Beethoven Bravo-Medina +3 more
doaj +1 more source