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Aditya L-1
Aditya L1 shall be the first space-based Indian mission to The major objectives of Aditya-L1 mission:
study the Sun. The spacecraft shall be placed in a halo
orbit around the Lagrange point 1 (L1) of the Sun-Earth Study of Solar upper atmospheric (chromosphere
system, which is about 1.5 million km from the Earth. A and corona) dynamics.
satellite placed in the halo orbit around the L1 point has Study of chromospheric and coronal heating,
the major advantage of continuously viewing the Sun physics of the partially ionized plasma, initiation of
without any occultation/eclipses. This will provide a the coronal mass ejections, and flares
greater advantage of observing the solar activities and Observe the in-situ particle and plasma
their effect on space weather in real-time. The spacecraft environment providing data for the study of particle
carries seven payloads to observe the photosphere, dynamics from the Sun.
chromosphere and the outermost layers of the Sun (the Physics of solar corona and its heating mechanism.
corona) using electromagnetic and particle and magnetic Diagnostics of the coronal and coronal loops
field detectors. Using the special vantage point L1, four plasma: Temperature, velocity and density.
payloads directly view the Sun and the remaining three Development, dynamics and origin of CMEs.
payloads carry out in-situ studies of particles and fields at Identify the sequence of processes that occur at
multiple layers (chromosphere, base and extended
the Lagrange point L1, thus providing important scientific corona) which eventually leads to solar eruptive
studies of the propagatory effect of solar dynamics in the events.
interplanetary medium Magnetic field topology and magnetic field
measurements in the solar corona .
The suits of Aditya L1 payloads are expected to provide Drivers for space weather (origin, composition and
most crucial information to understand the problem of dynamics of solar wind .shall be the first space-
coronal heating, coronal mass ejection, pre-flare and flare based Indian Mission
activities and their characteristics, dynamics of space
weather, propagation of particle and fields etc.
Swanand Ganesh Nalage (8E)
