Results 1 to 10 of about 478,526 (269)

Progress and prospects based on Qujing incoherent scatter radar measurements

地球与行星物理论评
Herein, the technical characteristics and programme of Qujing incoherent scatter radar (the first one in China) are described. The measurement ability in the ionosphere, space debris, and the Moon was investigated using the data.
Jiansu Miao, Zonghua Ding, Liandong Dai, Song Yang, Jian Wu   +4 more
doaj   +1 more source

Statistical Study of Ionospheric Equivalent Slab Thickness at Guam Magnetic Equatorial Location

Remote Sensing, 2021
The ionospheric equivalent slab thickness (τ) is defined as the ratio of the total electron content (TEC) to the F2-layer peak electron density (NmF2), and it is a significant parameter representative of the ionosphere.
Yuqiang Zhang, Zhensen Wu, Jian Feng, Tong Xu, Zhongxin Deng, Ming Ou, Wen Xiong, Weimin Zhen   +7 more
doaj   +1 more source

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

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   +1 more source

PAINLEV´E TEST OF A MAGNETOHYDRODYNAMICS SYSTEM [PDF]

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2015
One approximation of magnetohydrodynamics equations, which describe the cosmic object’s magnetic field, is considered. The analytic properties of a nonlinear system are investigated by Painlev´e test.
G.M. Vodinchar, D.S. Noshenko, A.S. Perezhogin   +2 more
doaj   +1 more source

Flying Target Detection Technology Based on GNSS Multipath Signals

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   +1 more source

A Novel Dual-Broadband Dual-Polarized Electrical Downtilt Base Station Antenna for 2G/3G Applications

IEEE Access, 2017
A novel dual-broadband dual-polarized base station antenna array with compact structure and low profile is proposed in this paper for the existing mobile communication system operating over 0.79-0.96 GHz (European Digital Dividend/CDMA/GSM) and 1.71-2.17
Yejun He, Wei Tian, Long Zhang
doaj   +1 more source

Analysis of ionospheric parameters during Solar events and geomagnetic storms

E3S Web of Conferences, 2016
The paper shows new methods of analysis of ionospheric and magnetic data applying the models of multicomponent constructions (MCM models) developed by the authors.
Mandrikova Oksana, Polozov Yury, Solovev Igor, Fetisova Nadezhda   +3 more
doaj   +1 more source

Determining Wind Shear Threshold by Using Historical Sounding Data in Experimental Area

Atmosphere
This paper conducts a technical study on a method for determining the occurrence threshold of wind shear based on historical sounding data. After analyzing the impact of low-altitude wind shear on aircraft flight safety, a method for determining the ...
Tingting Shu, Qinglin Zhu, Xiang Dong, Houcai Chen, Leke Lin, Xuan Liu   +5 more
doaj   +1 more source

The gluon propagator [PDF]

Physics Reports, 1999
We discuss the current state of what is known non-perturbatively about the gluon propagator in QCD, with emphasis on the information coming from lattice simulations. We review the specification of the lattice Landau gauge and the procedure for calculating the gluon propagator on the lattice.
openaire   +2 more sources

Parameter Estimation of Ionospheric Echo Signals Using an Electromagnetic Vector Array

IEEE Access
With the use of the non-stationarity and waveform information of the ionospheric echo signals, an approach to the joint estimation of angles and polarization states is proposed by using an array of electromagnetic vector antennas.
Shujuan Ding, Jie Wang, Jinzhi Bi, Na Wei, Rongqiu Zheng, Junbo Yang   +5 more
doaj   +1 more source