Results 21 to 30 of about 271,699 (362)
Thermal Characteristic of Novel Insulation Materials Designed for Solar Simulator
Energies, 2022 The solar simulator is an important device for simulating solar irradiation in cold black and vacuum environments and has a wide range of application prospects.
Wenjing Ding +4 more
doaj +1 more source
Baseline designing and implementation approach for a Geo-SAR tomography system
The Journal of Engineering, 2019 This study proposes a new method to design and implement the baseline of a geosynchronous Earth orbit synthetic aperture radar (Geo-SAR) tomography system. Due to the satellite's orbital property, its ideal revisit cycle is 1 day, and it could be changed
Zhao Bingji +4 more
doaj +1 more source
Stochastic Subspace Method for Experimental Modal Analysis
MATEC Web of Conferences, 2016 The formula of stochastic subspace identification method is deduced in details and the program is written out. The two methods are verified by a vibration test on a 5-floor rigid frame model.
Liu Dazhi +5 more
doaj +1 more source
Deflecting small asteroids using laser ablation : Deep space navigation and asteroid orbit control for LightTouch2 Mission [PDF]
, 2013 This paper presents a low-cost, low mass, mission design to successfully intercept and deflect a small and faint, 4 m in diameter asteroid. Intended to be launched after 2025, the laser-ablating mission, LightTouch2 will be used to deflect the orbit of ...
Branco, Joao +4 more
core +1 more source
Back projection algorithm-based GEO SAR real-time quick Look imaging system
The Journal of Engineering, 2019 Geosynchronous earth orbit synthetic aperture radar (GEO SAR) has the advantages of short revisit period and wide observation range. However, compared with low earth orbit SAR (LEO SAR), GEO SAR has the distinct characteristics of long synthetic aperture
Qingjun Zhang +6 more
doaj +1 more source
Journal of Mathematics, 2023 Predicting telemetry data is vital for the proper operation of orbiting spacecraft. The Grey–Markov model with sliding window (GMSW) combines Grey model (GM (1, 1)) and Markov chain forecast model, which allows it to describe the fluctuation of telemetry
Liang Ren +3 more
doaj +1 more source
Research on nanosatellite thermal cycling test applicability
MATEC Web of Conferences, 2017 In order to verify the spacecraft performance in extreme temperature and vacuum, and to screen spacecraft early defect, generally spacecraft TV (Thermal Vacuum) test should be carried out before launch.
Li Xiyuan +5 more
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. +2 more
core +1 more source
Fast Neutron Detector Based on Hybrid 2D Perovskite Thin Films
Advanced Functional Materials, EarlyView.This work presents the direct detection of fast neutrons using flexible hybrid 2D perovskite (PEA2PbBr4) thin‐film detectors. Thanks to their high low‐Z elements content and good charge transport, these materials enable efficient neutron detection. The thin film configuration allowed the operation at low voltage, and offer scalability, flexibility, and
Ilaria Fratelli +11 more
wiley +1 more source
Study on thermal analysis simulation and test of propellant refueling process for optical module
Xibei Gongye Daxue XuebaoPropellant refueling is important for long-term operation of the optical module in orbit. However, its thermal environment is harsher than on previous missions. Therefore, thermal control of the entire process is required.
LU Wei +4 more
doaj +1 more source