Aditya L1 (A solar mission of INDIA)

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 interplanetary medium


Aditya-L1 Payloads:

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.

TypeSl. No.PayloadCapability
Remote Sensing Payloads1Visible Emission Line Coronagraph(VELC)Corona/Imaging & Spectroscopy
2Solar Ultraviolet Imaging Telescope (SUIT)Photosphere and Chromosphere Imaging- Narrow & Broadband
3Solar Low Energy X-ray Spectrometer (SoLEXS)Soft X-ray spectrometer: Sun-as-a-star observation
4High Energy L1 Orbiting X-ray Spectrometer(HEL1OS)Hard X-ray spectrometer: Sun-as-a-star observation
In-situ Payloads
5Aditya Solar wind Particle Experiment(ASPEX)Solar wind/Particle Analyzer Protons & Heavier Ions with directions
6Plasma Analyser Package For Aditya (PAPA)Solar wind/Particle Analyzer Electrons & Heavier Ions with directions
7Advanced Tri-axial High Resolution Digital MagnetometersIn-situ magnetic field (Bx, By and Bz).

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