Investigation of the annual solar eclipse by using total electron content (TEC) measurements / Norsuzila Ya’acob ... [et al.]

This research investigates the ionosphere response to
the annual solar eclipse on 26th January 2009 over Indonesia and
Singapore. During solar eclipse, ionosphere will be affect due to
the partial or complete obstruction of solar emission. It makes the
number of electrons and ions decreases. There are several factors
that will contribute to the ionosphere response which are the level
of solar and geomagnetic disturbances, geographical latitude and
longitude and local time. There are some methods that use to
determine the behavior of ionosphere response during solar
eclipse. It includes ionosonde measurements, incoherent scatter
radar (ISR) and Global Positioning System (GPS) satellite. In this
research, GPS satellite is use in order to investigate the
ionosphere response. This research focuses on the measurement
of Total Electron Content (TEC) obtained from two GPS station
which are Bako in Indonesia and Ntus in Singapore. The location
of these three GPS stations from the path of solar eclipse occur is
different. The data is obtained a day before and during solar
eclipse. From the findings it shows that TEC level will reduce
during solar eclipse due to the reduction of ionizing radiation.