Results 21 to 30 of about 185,909 (167)

Thermal Characteristic of Novel Insulation Materials Designed for Solar Simulator

open access: yesEnergies, 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

open access: yesThe 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

open access: yesMATEC 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

Back projection algorithm-based GEO SAR real-time quick Look imaging system

open access: yesThe 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

Predicting Spacecraft Telemetry Data by Using Grey–Markov Model with Sliding Window and Particle Swarm Optimization

open access: yesJournal 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

open access: yesMATEC 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

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

open access: yesAerospace, 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   +10 more
semanticscholar   +1 more source

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

open access: yesEAI 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

Study on thermal analysis simulation and test of propellant refueling process for optical module

open access: yesXibei Gongye Daxue Xuebao
Propellant 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

Design of Temperature Fluctuation Test Platform Based on Radiation Heat Transfer

open access: yesMATEC 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   +3 more
doaj   +1 more source

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