Results 31 to 40 of about 6,017 (50)

Joint Three-dimensional Location Algorithm for Airborne Interferometric SAR System

open access: yesLeida xuebao, 2013
Joint three-dimensional location algorithm aims to get the north, east and height coordinates of each pixel in several adjacent Interferometric Synthetic Aperture Radar (InSAR) scenes simultaneously.
Mao Yong-fei   +2 more
doaj   +1 more source

Synthetic Aperture Interferometric Passive Radiometer Imaging to Locate Electromagnetic Leakage From Spacecraft Surface

open access: yesIET Circuits, Devices and Systems
The localization of electromagnetic radiation leakage through cabin gaps is a critical and challenging aspect of electromagnetic compatibility (EMC) design for spacecraft with complex electromagnetic environments.
Yuting Zhang   +3 more
doaj   +1 more source

Air dehumidification by membrane with cold water for manned spacecraft environmental control

open access: yesMATEC Web of Conferences, 2017
The traditional condensation dehumidification method requires additional gas-liquid separation and water recovery process in the manned spacecraft humidity control system, which would increase weight and complexity of systems.
Shang Yonghong   +6 more
doaj   +1 more source

Damage Effects of Electron Irradiation with Different Energy on Mechanical Properties of Polyethylene Heat-shrinkable Sleeves

open access: yesJournal of Aeronautical Materials, 2016
Damage effects of electron irradiation with different energy on mechanical properties of polyethylene heat-shrinkable sleeves were studied by irradiating the sleeves with 45 keV, 1 MeV and 2 MeV electrons respectively.
LIU Yuming   +4 more
doaj   +1 more source

Design of Real-Time Database for the Vacuum Cold-Black Environment Simulator

open access: yesMATEC Web of Conferences, 2018
There is an urgent need to develop a real-time database (RTDB) to handle large amounts of real-time data, to realize process monitoring of vacuum cold-black environment simulation, cold-black environment data acquisition, fault processing, data storage ...
Shao Jingyi, Ning Juan, Liu Yangyang
doaj   +1 more source

Distributed State Estimation for Networked Spacecraft Thermal Experiments Over Sensor Networks With Randomly Varying Transmission Delays

open access: yesIEEE Access, 2018
This paper investigates the distributed state estimation problem for spacecraft thermal experiments over sensor networks. The state estimators are designed in a distributed fashion to estimate the surplus temperature of the target node in the spacecraft.
Chang Liu   +4 more
doaj   +1 more source

Fiber Optic Acoustic Vibration Sensors for Ultrasound Measurement in Low-Pressure CO₂ Environment

open access: yesIEEE Access, 2020
The detection of acoustic signals in the Martian environment is significant to understand the issues such as the evolution of the universe, structure of matter, origin of life, and future migration of humans.
Jingchuan Zhang, Yifei Pei, Xiyuan Li
doaj   +1 more source

Research on Microvibration Transmission of Control Moment Gyro Considering Internal Structural Flexibility

open access: yesInternational Journal of Aerospace Engineering
Control moment gyro (CMG) can produce microvibration and influence the performance of sensitive instruments aboard the spacecraft. This article is aimed at constructing the microvibration transmission model of a large-scale CMG incorporating the ...
Jin You, Wei Zhu, Hao Wang
doaj   +1 more source

Effect of Atomic Oxygen on Electric Properties of Graphene Films

open access: yesCailiao gongcheng, 2017
The resistance and the surface morphology of the graphene films were studied after atomic oxygen exposure. The graphene films can be etched away during atomic oxygen exposure, the resistance of graphene films decreases at first and then increases.
LIU Yu-ming   +4 more
doaj   +1 more source

An Integrated Method for Microwave Absorption and External Thermal Flow Simulation in SAR Antenna Vacuum Thermal Tests

open access: yesSensors
The simulation of microwave absorption and external thermal flow is an essential aspect of the vacuum thermal testing process for Synthetic Aperture Radar (SAR) antenna.
Shangjie Pan   +4 more
doaj   +1 more source

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