Aditya L1 shall be the first space based Indian mission to study the Sun. The spacecraft shall be
placed in a halo orbit around the Lagrange point 1 (L1) of the Sun-Earth system, which is about
1.5 million km from the Earth. A satellite placed in the halo orbit around the L1 point has the
major advantage of continuously viewing the Sun without any occultation/eclipses. This will
provide a greater advantage of observing the solar activities and its effect on space weather in
real time. The spacecraft carries seven payloads to observe the photosphere, chromosphere and the
outermost layers of the Sun (the corona) using electromagnetic and particle and magnetic field
detectors. Using the special vantage point L1, four payloads directly view the Sun and the
remaining three payloads carry out in-situ studies of particles and fields at the Lagrange point
L1, thus providing important scientific studies of the propagatory effect of solar dynamics in the
The suits of Aditya L1 payloads are expected to provide most crucial informations to understand
the problem of coronal heating, coronal mass ejection, pre-flare and flare activities and their
characteristics, dynamics of space weather, propagation of particle and fields etc.
The major science objectives of Aditya-L1 mission are:
The instruments of Aditya-L1 are tuned to observe the solar atmosphere mainly the chromosphere and
corona. In-situ instruments will observe the local environment at L1. There are total seven
payloads on-board with four of them carrying out remote sensing of the Sun and three of them
carrying in-situ observation.
Payloads along with their major capability of scientific investigation.