Results 1 to 10 of about 1,209,286 (305)

Error Self-calibration Method in Spatial Spectrum Estimation

open access: yesLeida xuebao, 2014
An important bottleneck in spatial spectrum estimation theory is array errors. A new error self-calibration method is presented on the basis of active error calibration and online self-calibration theories.
Huang Chuan-lu, Chao Kun, Mao Yun-zhi
doaj   +1 more source

АНАЛИЗ ГЕОМАГНИТНЫХ ДАННЫХ И КОСМИЧЕСКИХ ЛУЧЕЙ В ПЕРИОДЫ ПОВЫШЕННОЙ СОЛНЕЧНОЙ АКТИВНОСТИ [PDF]

open access: yesVestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2016
We performed analysis of the cosmic rays variations and studied features of geomagnetic field variations during periods of increased solar activity. The paper applies a new methods of modeling and analysis of the data developed by the authors based on ...
O.V. Mandrikova   +3 more
doaj   +1 more source

Simultaneous lithospheric-atmospheric signals of acoustic emission at “Karymshina” site in Kamchatka [PDF]

open access: yesEPJ Web of Conferences, 2021
We present the results of complex lithospheric-atmospheric investigations of acoustic emission in a seismically active region (Kamchatka peninsula).
Larionov Igor   +2 more
doaj   +1 more source

Subcarrier-based Processing for Clutter Rejection in CP-OFDM Signal-based Passive Radar Using SFN Configuration (in English)

open access: yesLeida xuebao, 2013
Clutter rejection is a key technique used by passive radars for target detection. Especially when using Single Frequency Network (SFN) configuration, the multipath clutter and ground clutter increase several times more than during a single illuminator ...
Yi Jian-xin   +4 more
doaj   +1 more source

Influences of the state of ionospheric background on ionospheric heating effects

open access: yesAnnals of Geophysics, 2014
According to the well-performed ionospheric heating experiments at Arecibo in the low latitudes as well as at Tromsø in the high latitudes, the large-scale modification effects are simulated under an assumption of equivalent conditions, i.e., with the ...
Shuji Hao   +6 more
doaj   +1 more source

Comparative Analysis of Starlight Occultation Data Processing

open access: yesAtmosphere, 2023
In order to improve the inversion accuracy of stellar occultation data and to provide a reference for the selection of inversion methods with higher accuracy in the future, this study compared and analyzed the inversion effects of two different methods ...
Mingchen Sun   +5 more
doaj   +1 more source

Wave Parameter Inversion Based on Sea Clutter Characteristics

open access: yesRemote Sensing
Accurate acquisition of wave parameters is important for marine monitoring and target identification. Traditional methods are limited in sea state adaptability, real-time observation, and inversion accuracy.
Xiao Li   +4 more
doaj   +1 more source

Machine-Learning-Based GNSS Signal Anomaly Classification Using COSMIC-2 POD Data

open access: yesRemote Sensing
Ionospheric scintillation and radio frequency interference (RFI) affect Global Navigation Satellite System (GNSS) signals, making their distinction important for ionospheric monitoring and interference detection.
Ziming Liang   +8 more
doaj   +1 more source

Weight Loss Function for the Cooperative Inversion of Atmospheric Duct Parameters

open access: yesAtmosphere, 2022
Low-altitude atmospheric ducts are abnormal atmospheric phenomena in the troposphere, impacting the operation of microwave or ultrashort wave radio systems.
Jie Han   +7 more
doaj   +1 more source

Exploring Marine Atmospheric Ducts: Current Sensing and Emerging Trends

open access: yesRemote Sensing
Tropospheric refraction significantly impacts the propagation of ultrashort- and microwave-frequency radio waves over marine environments. Atmospheric ducting, the most common super-refractive structure, allows radio waves to travel over the horizon ...
Jin-Peng Zhang   +5 more
doaj   +1 more source

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