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Article
Removal mechanisms of nanosecond pulsed laser cleaning of blue and red polyurethane paint
In this study, laser cleaning of blue and red polyurethane paint on aluminum alloy surface were investigated by using a nanosecond pulsed laser at 1.8, 3.2 and 8.0 J/cm2. The surface topography after laser cleani...
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Article
Open AccessLatitudinal and interhemispheric differences of the ionospheric semi-diurnal lunitidal perturbations during the 2009 Arctic sudden stratospheric warming event in the eastern Asia–Australia sector
The ionosphere exhibits some characteristic perturbations during sudden stratospheric warming (SSW) events, of which the mechanism is not thoroughly understood. This study focuses on the latitudinal and interh...
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Article
Meridional movement of northern and southern equatorial ionization anomaly crests in the East-Asian sector during 2002–2003 SSW
The present paper investigates the asymmetrical variability of the location of the north and the south equatorial ionization anomaly (EIA) crests in the East-Asian sector, along with their association with sim...
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Article
Hour-to-hour variability of the ionosphere: An application of the classical multidimensional scaling method
The classical multidimensional scaling (MDS) method is introduced and applied in the study of the hour-to-hour ionospheric variability based on the ionospheric foF2 observed at three ionosonde stations in East...
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Article
Analysis of the ionospheric variability based on wavelet decomposition
In this work, the ionospheric variability is analyzed by applying the wavelet decomposition technique to the noontime foF2, F10.7, interplanetary magnetic field (IMF) Bz, Ap, and lower thermospheric temperatur...
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Article
The variation of the estimated GPS instrumental bias and its possible connection with ionospheric variability
Based on the analysis of the satellite DCB data estimated by our method and the Center for Orbit Determination in Europe (CODE) from 1999 to 2011, the features of the temporal variation of differential code bi...
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Article
Particle bursts in the inner radiation belt related to global lightning activity
Particle bursts (PBs), the phenomena characterized by short-term increases of particle counting rates (CRs), were observed by space-borne radiation belt particle detectors. With the electron CR data obtained b...
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Article
Case study of ionospheric fluctuation over mid-latitude region during one large magnetic storm
From Nov. 6 to 10, 2004, a large number of solar events occurred, which triggered many solar flares and coronal mass ejections (CMEs). These CMEs caused two large geomagnetic storms and continuous energy proto...
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Article
Observational study of daytime ionospheric irregularities associated with typhoon
Spread-F is a manifestation of ionospheric irregularities and generally takes place at nighttime. However, it can also be observed seldom at daytime. It is recognized that acoustic gravity waves (AGWs) play an...
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Article
Ionospheric absorption and planetary wave activity in East Asia sector
In this paper, we focus on ionospheric absorption in the East Asia sector, and look for manifestations of atmospheric influences in this area. First, a 4-year historical record of absorption measurement at Bei...
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Article
The seasonal dependence of cycle slip occurrence of GPS data over China low latitude region
The relationship of daily accumulated cycle slip occurrence with the season is analyzed using the GPS data observed in six GPS stations located in China low latitude region in 2001. It is found that the season...
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Article
Energetic particle radiations measured by particle detector on board CBERS-1 satellite
Using the data measured by energetic particle detector on board CBERS-01 and-02 for the past five years, statistics was made to show the general features of MeV electrons and protons along a solar synchronous ...
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Article
Sunlit boundary ionospheric response to the great flare on Oct. 28, 2003
The ionospheric TEC in the sunlit boundary region during outburst of the great flare on Oct. 28, 2003 is analyzed using GPS data from IGS network. It is found that the ionosphere over the region of solar zenit...
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Article
The correlation of flare’s location on solar disc and the sudden increase of total electron content
The correlation of flare’s location on solar disc with the value of sudden increase of total electron content is analyzed with flare’s parameters observed by GOES satellite from 1997 to 1999 and total electron...
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Article
Correlative ionospheric disturbances in the sunlit hemisphere during the flare on July 14, 2000
Using GPS data obtained from GPS sites located on the sunlit hemisphere during the flare on July 14, 2000, the ionospheric response to the flare was analyzed. A kind of tiny correlative ionospheric fluctuation...
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Article
The estimation method of GPS instrumental biases
A model of estimating the global positioning system (GPS) instrumental biases and the methods to calculate the relative instrumental biases of satellite and receiver are presented. The calculated results of GP...
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Article
Study of the ionospheric TEC using GPS during the large solar flare burst on Nov. 6, 1997
Using the data from 15 global positioning system (GPS) stations scattered between 28° N—45° N and 90° W—77° E we obtained the total electron content (TEC) variations with time during a large solar flare. The r...
