Results 41 to 50 of about 383,072 (432)

Vision-Based Spacecraft Pose Estimation via a Deep Convolutional Neural Network for Noncooperative Docking Operations

Aerospace, 2020
The capture of a target spacecraft by a chaser is an on-orbit docking operation that requires an accurate, reliable, and robust object recognition algorithm.
Thaweerath Phisannupawong, Patcharin Kamsing, Peerapong Torteeka, Sittiporn Channumsin, U. Sawangwit, Warunyu Hematulin, Tanatthep Jarawan, Thanaporn Somjit, S. Yooyen, D. Delahaye, P. Boonsrimuang   +10 more
semanticscholar   +1 more source

Electric propulsion for satellites and spacecraft: established technologies and novel approaches

, 2016
This contribution presents a short review of electric propulsion (EP) technologies for satellites and spacecraft. Electric thrusters, also termed ion or plasma thrusters, deliver a low thrust level compared to their chemical counterparts, but they offer ...
S. Mazouffre
semanticscholar   +1 more source

Design Approach for CCSDS Complied Command Operation and Frame Operation Procedure for Integrated Spacecraft Checkout [PDF]

EAI Endorsed Transactions on Cloud Systems, 2018
Consultative Committee for Space Data Systems (CCSDS) complied Telemetry and Telecommand Processor’s (TTCP) development was taken up by Spacecraft Checkout Group (SCG) of U. R. Rao Satellite Centre, Indian Space Research Organization (ISRO) as a part of ‘
Parul Sharma, Sangeetha K., Vithal Metri
doaj   +1 more source

Active control of spacecraft charging on ATS-5 and ATS-6 [PDF]

, 1977
Effects on spacecraft ground potential of active emission of charged particles are being investigated through experiments using the ATS-5 and ATS-6 spacecraft.
Bartlett, R. O., Deforest, S. E., Purvis, C. K.   +2 more
core   +1 more source

Advances in Hybrid Icing and Frosting Protection Strategies for Optics, Lens, and Photonics in Cold Environments Using Thin‐Film Acoustic Waves

Advanced Engineering Materials, EarlyView.
This article provides a comprehensive overview of fundamentals and recent advances of transparent thin‐film surface acoustic wave technologies on glass substrates for monitoring and prevention/elimination of fog, ice, and frost. Fogging, icing, or frosting on optical lenses, optics/photonics, windshields, vehicle/airplane windows, and solar panel ...
Hui Ling Ong, Zhangbin Ji, Luke Haworth, Yihao Guo, Jaime del Moral, Stefan Jacob, Ana Borras, Agustin R. Gonzalez‐Elipe, Jikai Zhang, Jian Zhou, Glen McHale, Yong‐Qing Fu   +11 more
wiley   +1 more source

Minimum-fuel Spacecraft Rendezvous based on Sparsity Promoting Optimization [PDF]

arXiv, 2021
In this paper, we consider the classical spacecraft rendezvous problem in which the so-called active spacecraft has to approach the target spacecraft which is moving in an elliptical orbit around a planet by using the minimum possible amount of fuel.
arxiv  

Design of Temperature Fluctuation Test Platform Based on Radiation Heat Transfer

MATEC Web of Conferences, 2019
The optical characteristics of the space science detectors are very sensitive to the temperature fluctuation. In order to study the effect of it, a method to simulate the temperature fluctuation was put forward in this paper, and the feasibility of this ...
Xiao Han, Ying Zhou, Ruijin Jia, Wang Zijuan   +3 more
doaj   +1 more source

Active control of potential of the geosynchronous satellites ATS-5 and ATS-6 [PDF]

, 1977
The ATS-6 geosynchronous satellite carries two cesium ion thrusters as part of the technology experiment package. Their effectiveness in controlling the spacecraft potential was shown during normal operation of the thrusters.
Goldstein, R.
core   +1 more source

Jupiter’s interior and deep atmosphere: The initial pole-to-pole passes with the Juno spacecraft

Science, 2017
Juno swoops around giant Jupiter Jupiter is the largest and most massive planet in our solar system. NASA's Juno spacecraft arrived at Jupiter on 4 July 2016 and made its first close pass on 27 August 2016. Bolton et al.
S. Bolton, A. Adriani, V. Adumitroaie, M. Allison, J. Anderson, S. Atreya, J. Bloxham, S. Brown, J. Connerney, E. Dejong, W. Folkner, D. Gautier, D. Grassi, S. Gulkis, T. Guillot, C. Hansen, W. Hubbard, L. Iess, A. Ingersoll, M. Janssen, J. Jørgensen, Y. Kaspi, S. Levin, Cheng Li, J. Lunine, Y. Miguel, A. Mura, G. Orton, T. Owen, M. Ravine, E. Smith, P. Steffes, E. Stone, D. Stevenson, R. Thorne, J. Waite, D. Durante, R. Ebert, T. Greathouse, V. Hue, M. Parisi, J. Szalay, R. Wilson   +42 more
semanticscholar   +1 more source

Assessing the Powder Bed Fusion–Laser Beam Potential of Glass‐Forming Alloys Using Single and Multitrack Laser Glazing Experiments

Advanced Engineering Materials, EarlyView.
Characterizations of the expanse of processes parameter combinations that can be used to minimize cracking and porosity while optimizing crystallization and hardness are used to assess laser processing of four glass‐forming alloys. The set of viable alloys for laser additive manufacturing is not the same as for suction casting; some alloys are common ...
Soumya Mohan, Harrison Holberton, Aaron P. Stebner, Douglas C. Hofmann   +3 more
wiley   +1 more source