Results 21 to 30 of about 5,241,656 (274)

Advances in soft X-ray emission of the Earth's magnetosphere

地球与行星物理论评, 2023
The coupling between solar wind and the magnetosphere and the dynamic processes in geo-space are the basic driving factors of space weather. Understanding these processes on the system level is essential to the studies of space physics and space weather.
Tianran Sun, Yingjie Zhang, Fei Wei, Songwu Peng, Zhonghua Yao, Chi Wang   +5 more
doaj   +1 more source

Spectral Light Curve Simulation for Parameter Estimation from Space Debris

Aerospace, 2022
Characterisation of space debris has become a fundamental task to facilitate sustainable space operations. Ground-based surveillance provides the means to extract key attributes from spacecraft.
Max Nussbaum, Ewan Schafer, Zizung Yoon, Denise Keil, Enrico Stoll   +4 more
doaj   +1 more source

Research Advancements in Key Technologies for Space-Based Situational Awareness

Space: Science & Technology, 2022
The space environment has become highly congested due to the increasing space debris, seriously threatening the safety of orbiting spacecraft. Space-based situational awareness, as a comprehensive capability of threat knowledge, analysis, and decision ...
Beichao Wang, Shuang Li, Jinzhen Mu, Xiaolong Hao, Wenshan Zhu, Jiaqian Hu   +5 more
doaj   +1 more source

Space Defense in Europe. Policy and Security Aspects [PDF]

Polish Political Science Yearbook, 2020
Today countries participating in space activities, share serious concerns about militarization of space. The defense of space can become an important issue in the international arena, because counteracting emerging threats will probably be associated not
Małgorzata Polkowska
doaj   +1 more source

Optical Tracking Data Validation and Orbit Estimation for Sparse Observations of Satellites by the OWL-Net

Sensors, 2018
An Optical Wide-field patroL-Network (OWL-Net) has been developed for maintaining Korean low Earth orbit (LEO) satellites’ orbital ephemeris. The OWL-Net consists of five optical tracking stations.
Jin Choi, Jung Hyun Jo, Hong-Suh Yim, Eun-Jung Choi, Sungki Cho, Jang-Hyun Park   +5 more
doaj   +1 more source

Performance Analysis of Sensor Systems for Space Situational Awareness [PDF]

Journal of Astronomy and Space Sciences, 2017
With increased human activity in space, the risk of re-entry and collision between space objects is constantly increasing. Hence, the need for space situational awareness (SSA) programs has been acknowledged by many experienced space agencies.
Eun-Jung Choi, Sungki Cho, Jung Hyun Jo, Jang-Hyun Park, Taejin Chung, Jaewoo Park, Hocheol Jeon, Ami Yun, Yonghui Lee   +8 more
doaj   +1 more source

Microservice-Based Platform for Space Situational Awareness Data Analytics

International Journal of Aerospace Engineering, 2020
The development, deployment, and maintenance of the current space situational awareness (SSA) information system have become increasingly complex. However, researchers cannot flexibly and conveniently apply the research results to practical applications ...
Wanjie Lu, Qing Xu, Chaozhen Lan, Liang Lyu, Yang Zhou, Qunshan Shi, Yinghao Zhao   +6 more
doaj   +1 more source

Building shared situational awareness in surgery through distributed dialog [PDF]

, 2013
Brigid M Gillespie,1 Karleen Gwinner,2 Nicole Fairweather,3 Wendy Chaboyer41NHMRC Research Centre for Clinical Excellence in Nursing Interventions for Hospitalised Patients (NCREN) and Research Centre for Clinical and Community Practice Innovation ...
Gwinner K, Chaboyer W, Gillespie BM, Fairweather N   +3 more
core   +3 more sources

Ontology For Europe's Space Situational Awareness Program [PDF]

, 2017
This paper presents an ontology architecture concept for the European Space Agency‘s (ESA) Space Situational Awareness (SSA) Program. It incorporates the author‘s domain ontology, The Space Situational Awareness Ontology and related ontology work.
Rovetto, Robert J.
core   +3 more sources

Effective Computational Approach for Prediction and Estimation of Space Object Breakup Dispersion during Uncontrolled Reentry

International Journal of Aerospace Engineering, 2018
This paper provides an effective approach for the prediction and estimation of space debris due to a vehicle breakup during uncontrolled reentry. For an advanced analysis of the time evolution of space debris dispersion, new efficient computational ...
Deok-Jin Lee, Eun Jung Choi, Sungki Cho, Jung-Hyun Jo, Tae Soo No   +4 more
doaj   +1 more source