Ionospheric Scintillation Morphological Analysis Using GPS-SCINDA Data
at Low Latitude Ground Station
Abstract
This study aims to present the morphology of GPS L-band scintillations
at the equatorial anomaly station Bahir Dar (11030’N, 37030’E) using
GPS-SCINDA data in the descending high solar activity period between
January 2014 to December 2014. In studying low-latitude scintillation,
we have used millions of data recorded every minute of one year by 32
GPS satellite and it is found that intense scintillation occurred during
the day time with a small frequency and very frequent occurrences of
relatively moderate scintillation during the night time. In the period
of observation, the variation of scintillations with local time and
season are analyzed and it is found that occurrence of scintillation is
minimum in summer months and maximum in equinox months with highest
values observed in the months of March and September. Pre-midnight and
post-midnight occurrence of scintillation is also studied and
Pre-midnight scintillation was found to be maximum in equinox whereas it
is minimum in winter months. Generally, it is found that most of
scintillations are weak (s4<0.1) and intense scintillations
with s4>0.3 are rare.