Results 21 to 30 of about 40,602 (165)

The progress of laser ranging technology at Shanghai Astronomical Observatory

Geodesy and Geodynamics, 2019
As an important station of International Laser Ranging Service (ILRS), Shanghai Astronomical Observatory (SHAO) has upgraded Satellite Laser Ranging (SLR) system with high repetition rate and achieved some technological progress.
Zhibo Wu, Haifeng Zhang, Huarong Deng, Mingliang Long, Zhien Cheng, Zhongping Zhang, Wendong Meng   +6 more
doaj   +1 more source

Weak Spatial Target Extraction Based on Small-Field Optical System

Sensors, 2023
Compared to wide-field telescopes, small-field detection systems have higher spatial resolution, resulting in stronger detection capabilities and higher positioning accuracy.
Xuguang Zhang, Yunmeng Liu, Huixian Duan, E Zhang   +3 more
doaj   +1 more source

SD-DETR: Space Debris Detection Transformer Based on Dynamic Convolutional Network and Cross-Scale Collaborative Attention

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
With the advancement of human exploration of near-Earth space, the number of space debris in Earth’s orbit has increased dramatically, posing serious threats to orbiting spacecraft.
Zhikang Zhang, Yang Zhang, Wei Liu, Chuankai Liu, Tingshan Liu   +4 more
doaj   +1 more source

Mechanics of Space Debris Removal: A Review

Aerospace
The growing population of space debris poses a critical risk to space operations, requiring urgent removal strategies. Numerous scientific investigations have focused on debris capture mechanisms in Earth’s orbits, including contact and contact-less ...
Mohammad Bigdeli, Rajat Srivastava, Michele Scaraggi   +2 more
doaj   +1 more source

Effect Analysis of Optical Masking Algorithm for GEO Space Debris Detection

International Journal of Optics, 2019
A method with high detection rate, low false-alarm rate, and low computational cost is presented for removing stars and noise and detecting space debris with signal-to-noise ratio (SNR>3) in consecutive raw frames.
Sijie Kong, Jin Zhou, Wenli Ma
doaj   +1 more source

Localization and classification of space objects using EfficientDet detector for space situational awareness

Scientific Reports, 2022
Space situational awareness (SSA) systems play a significant role in space navigation missions. One of the most essential tasks of this system is to recognize space objects such as spacecrafts and debris for various purposes including active debris ...
Nouar AlDahoul, Hezerul Abdul Karim, Angelo De Castro, Myles Joshua Toledo Tan   +3 more
doaj   +1 more source

Enhanced YOLOv8-based method for space debris detection using cross-scale feature fusion

Discover Applied Sciences
Optical observations play a crucial role in monitoring space debris, and long exposure large field-of-view telescopes exhibit robust detection capabilities for identifying space debris.
Yang Guo, Xianlong Yin, Yao Xiao, Zhengxu Zhao, Xu Yang, Chenggang Dai   +5 more
doaj   +1 more source

Design of Low-Cost Simulation Space Micro Debris Launch Device

Aerospace
The high cost and low emission frequency of microparticle launchers have resulted in a long lead time for the development of detectors for micro-debris in space.
Renjie Yang, Kai Tang, Xuqiang Lang, Cheng He, Yu Liu, Yue Liu   +5 more
doaj   +1 more source

A Highly-Integrated Reconfigurable Ka-Band Receiver Supporting Active and Passive Detections in a 90-nm CMOS Technology

IEEE Access, 2021
A highly-integrated reconfigurable Ka-band receiver in a 90-nm CMOS technology is proposed for the applications of satellite wireless communications, remote sensing of atmospheric conditions, and detection of space debris.
Chun-Hsing Li, Ke-Deng Huang, Te-Yen Chiu   +2 more
doaj   +1 more source

Deep learning‐based space debris detection for space situational awareness: A feasibility study applied to the radar processing

IET Radar, Sonar & Navigation
The increasing number of space objects (SO), debris, and constellation of satellites in Low Earth Orbit poses a significant threat to the sustainability and safety of space operations, which must be carefully and efficiently addressed to avoid mutual ...
Federica Massimi, Pasquale Ferrara, Roberto Petrucci, Francesco Benedetto   +3 more
doaj   +1 more source