Abstract:
A research on the study of the seasonal appearance of Plasma Bubble on Kototabang
West Sumatra has been done using Airglow Imager for 2 years (January 2013-
December 2014). This study aimed to characterize the impacts of ionospheric
irregularities associated with plasma bubbles occurences on Global Navigation Satellite
System (GNSS). It was analysed the occurrence of plasma bubble in All-Sky Airglow
Imager (ASI) images from 2013-2014, and found that the highest occurance rate
obtained in July 2013 and March 2014, namely 3 and 7 plasmas. The occurrance rate
was not due to geomagnetic storms, this claim was supported by statistically data that
there was no changes in physical characteristics that was caused by geomagnetic storm.
The highest probability of plasma bubble occurred in March , namely 45.49 % in 2013
and 38.10 % in September 2014. This was the difference of occurrence plasma bubbles
because probability is duration time (in hours) the occurance of plasma bubbles and
clear skies in the data All- Sky Imager ,which it was only focused on observation of the
conditions of clear sky at night and see the emergence of plasma bubbles during periods
of clear sky .
