The blue luminous events observed by ISUAL payload on board FORMOSAT‐2 satellite

On remote sensing of transient luminous events’ parent lightning discharges by ELF/VLF wave measurements on board a satellite

On-board Payload Data Processing Systems

At the turn of this century, satellites which have demonstrated the feasibility of many space applications, enter in a new era. Today they have an additional mandate: they must provide a well-identified service to Users and/or to Customers. This is applicable not only to Telecommunication but also to Earth observation missions. Data products or derived information must be elaborated rapidly in ...

White dwarfs observed by the HIPPARCOS satellite

TheHIPPARCOSsatellite hasmeasured trigonometric parallaxes for 20 white dwarfs. With the exception of one each of the spectral types DZ, DC, DB, DQ, the majority are of spectral type DA. We compare the parallaxes with the most recent ground-based determinations. Froma spectroscopic analysis of new optical observations we determine atmospheric parameters Teff and log g. From the angular diameter...

Analysis of lightning strokes associated with sprites observed by ISUAL in the vicinity of North America

We examined the broadband (< 1 Hz to 30 kHz) lightning sferics associated with 395 sprites observed near North America by the Imager of Sprites and Upper Atmospheric Lightning (ISUAL) onboard the FORMOSAT-2 satellite in a 12-year period from 2004 2015. Our analysis indicates that the ISUAL dataset contains a significant fraction (69, or ~18%) of negative sprites, which were predominantly (> 80%...

On the population of galactic Luminous Blue Variables

We report the first results of a long term infrared monitoring campaign of known and candidate galactic Luminous Blue Variables (LBVs). In particular, we are able to confirm the LBV nature of G24.73+0.69, a luminous mid-B supergiant associated with a dusty ejection nebula. We find that prior to 2003 September G24.73+0.69 exhibited low amplitude (∆JHK ∼ 0.4 mag) variability, but in the ∼200 day ...