Results 1 to 10 of about 705,367 (158)

Satellite Navigation Spoofing Interference Detection and Direction Finding Based on Array Antenna [PDF]

Sensors, 2023
Satellite navigation signals are feeble when they reach the ground, so they are vulnerable to attacks from outside interference signals. By emitting spoofing interference signals similar to real satellite signals, spoofing interference can make receivers
Huiyun Yang, Ruimin Jin, Wenpu Xu, Lei Che, Weimin Zhen   +4 more
doaj   +2 more sources

Comparison of Simulated and Measured Power of the Earth-Space Link for Satellite-Based AIS Signals [PDF]

Sensors, 2023
This research aims to analyze the impact of the Earth-Space link on the Automatic Identification System (AIS) signals of ships. To achieve this, we established a simulation system that measures the receiving power of AIS signals via satellite platforms ...
Xiang Dong, Zhigang Yuan, Fang Sun, Qinglin Zhu, Mingchen Sun, Pengfei Zhu   +5 more
doaj   +2 more sources

Method for Suppressing Non-Stationary Interference in the Main-Lobe Based on a Multi-Polarized Array [PDF]

Sensors
To suppress non-stationary main-lobe interference, we utilized the waveform information of the transmitted signal and proposed an interference suppression method based on a multi-polarized array without the need for calculating the target parameters ...
Jie Wang, Shujuan Ding, Na Wei, Jinzhi Bi, Rongqiu Zheng   +4 more
doaj   +2 more sources

Flying Target Detection Technology Based on GNSS Multipath Signals [PDF]

Sensors
In this study, a passive radar system that detects flying targets is developed in order to solve the problems associated with traditional flying target detection systems (i.e., their large size, high power consumption, complex systems, and poor ...
Pengfei Zhu, Qinglin Zhu, Xiang Dong, Mingchen Sun   +3 more
doaj   +2 more sources

Enhancement of ionospheric heating effect by chemical release [PDF]

Scientific Reports
The ionosphere can be artificially modified by employing ground-based high-power high-frequency electromagnetic waves to irradiate the ionosphere. This modification is achieved through the nonlinear interaction between the electromagnetic waves and the ...
Hai-Sheng Zhao, Jie Feng, Zheng-Wen Xu, Ya-Xin Liu, Kun Xue, Jian Wu, Cheng Wang, Shou-Zhi Xie, Huai-Yun Peng   +8 more
doaj   +2 more sources

Development and Application of Dual-Polarization Antenna for Dielectric Logging Sensor [PDF]

Sensors, 2022
Because the dielectric constant of water is greater than that of oil and gas, dielectric logging sensors can effectively distinguish oil and gas reservoirs from water layers by measuring the dielectric parameters of formations.
Chen Li, Shaogui Deng, Zhiqiang Li, Jian Wu, Baoyin Lu, Jutao Yang   +5 more
doaj   +2 more sources

A Regional Ionospheric Storm Forecasting Method Using a Deep Learning Algorithm: LSTM

Space Weather, 2023
An ionospheric storm forecasting method was proposed using a deep learning algorithm, LSTM (long short‐term memory). We used the perturbation index to denote the level of an ionospheric storm, deduced from foF2 data, and helped to remove most of the ...
Panpan Ban, Lixin Guo, Zhenwei Zhao, Shuji Sun, Tong Xu, Zhengwen Xu, Fengjuan Sun   +6 more
doaj   +1 more source

Precursors Identification for Forecasting UHF‐Band Ionospheric Scintillation Events Over Chinese Low‐Latitude Region by Deep Learning

Earth and Space Science, 2022
The occurrences of the UHF‐band ionospheric scintillation events caused by Equatorial Plasma Bubbles (EPBs) in the low‐latitude region depend on many factors.
Hongbo Zhang, Feifei Wang, Dongsheng Sheng, Panpan Ban, Yumei Liu   +4 more
doaj   +1 more source

Automatic GNSS Ionospheric Scintillation Detection with Radio Occultation Data Using Machine Learning Algorithm

Applied Sciences, 2023
Ionospheric scintillation often occurs in the polar and equator regions, and it can affect the signals of the Global Navigation Satellite System (GNSS).
Guangwang Ji, Ruimin Jin, Weimin Zhen, Huiyun Yang   +3 more
doaj   +1 more source

Design and Simulation of Stellar Occultation Infrared Band Constellation

Remote Sensing, 2022
This study provides an in-depth analysis of the characteristics of stellar occultation events. Using 10 target star sources, the influence of orbital elements on the number, duration, and distribution of stellar occultation events was simulated and ...
Qinglin Zhu, Mingchen Sun, Xiang Dong, Pengfei Zhu   +3 more
doaj   +1 more source