A geomagnetic storm event is identified wherein the base of the equatorial F layer (h′F) over dip equator moved unusually upward till premidnight hours and descended thereafter. The h′F variation is linearly correlated ...

Coronal mass ejections (CMEs) and Stream Interaction Regions (SIRs) are the main drivers of intense geomagnetic storms. We study the distribution of geomagnetic storms associated with different drivers during solar cycles ...

The authors have studied the radial change in the distribution of giant branch stars and the horizontal branch stars in ω Centauri. They show how the observed change in the distribution is related to the radial change in ...

A detailed calculation is given of the distribution of mass above the Galactic plane for any arbitrary mass distribution and velocity distribution. It is shown that an analytic expression can be found for the gravitational ...

A gradient-based method of tessellation was applied to SOHO Dopplergrams and to Ca II K filtergrams in order to study the cellular pattern of the solar surface, in specific the geometric relationship between the tessellation ...

Some aspects of the day-to-day variations in the diurnal behavior of F-region total electron content (TEC) and peak electron density (NmF2) at midlatitudes during summer months are studied using systematic and extensive ...

The diurnal variation of horizontal force at Kodaikanal on each of the international quiet days during the summer solstices of the years 1949-1951 is subjected to harmonic analysis. The harmonic coefficients of the same ...

A Digital Micromirror Device (DMD)-based Multi-Object Spectrograph (D-MOS) with an integrated imager has been developed. The optical performance of the MOS is evaluated through comprehensive laboratory calibration and ...