【摘 要】
：
This document took the long sequence of IGS ionospheric VTEC(Vertical Total Electron Content Unit) products as original data,based on the theory research of various abnormally detection methods,we cou
【机 构】
：
Institute of surveying and Mapping, Zhengzhou 450001, China
论文部分内容阅读
This document took the long sequence of IGS ionospheric VTEC(Vertical Total Electron Content Unit) products as original data,based on the theory research of various abnormally detection methods,we could select the optimal method to process VTEC products,combined with earthquake cases of which the magnitude greater than Ms5.0 in global range from 2003 to the present.And according to the principle of mathematical statistics,we found the relationship between the abnormal of io-nosphere and the factors of earthquakes.Through calculating the correlation coefficient and the single factor variance analysis between earthquake factors and the ionosphere anomalies.We not only confirmed that the earthquake have an effect on ionosphere anomalies,but also proved the conclusion that the magnitude have the positive correlation with the positive ionosphere anomalies,and under the condition of single factor analysis,we confirmed that the magnitude made an significant impact on the ionosphere anomalies before the earthquake happened.
其他文献
In view of the problem ofthe long term variation of code multipath error (called code multipath bias) in the IGSO and MEO satellite observable in Beidou satellite navigation system(BDS),code multipath
The introduction of Micro-Electro–Mechanical-System based IMU (MIMU) is a bold and meaningful conception for small unmanned aerial vehicle (UAV) autonomous approaching and landing.The adoption of a lo
Precise point positioning (PPP) technology is a positioning enhancement technique that can cover a large area and reduce the cost of positioning.With the support of real-time precise orbit and clock o
Frequency domain anti-jamming (FDAJ) has been widely adopted by most of military satellite navigation receivers.It is simple in theory and easy for realization.It can effectively suppress single tone
The spherical harmonics model to describe geopotentials relies on recursive algorithms,whose computational efficiency degrades significantly if the order of the expansion into spherical harmonics incr
To solve the problem of basic particle filter (PF),a novel GPS receiver autonomous integrity monitoring (RAIM) method was proposed,which was based on an algorithm combining particle swarm optimization
AltBOC (15,10) is proposed to be the modulation mode of BD B2 global signals,which combines lower and upper lobes with four signals.The modulation makes users able to receive and process one lobe sepa
In Global Navigation Satellite System (GNSS) receiver,ionospheric scintillation may lead huge tracking error and frequent cycle clips to the carrier phase tracking loop.When strong scintillation,the p
Identical with the other satellite navigation systems,such as GPS and Glonass,Beidou navigation satellite system is composed of space segment,ground segment and user segment.This paper focuses on the
Celestial bodies and horizontal line could be imaged simultaneously by fish-eye camera,and then the inclination of vessel could be calculated by steps of horizontal line extraction and horizontal line