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Aditya L1

Aditya L1 [ISRO]

Aditya L1 is an Indian solar observation satellite to be placed at the Sun-Earth Lagrangian point L1.

The major scientific objectives of the mission are to achieve a fundamental understanding of the physical processes that heat the solar corona, accelerate the solar wind and produce Coronal Mass Ejections (CMEs).

Originally the mission design started as a small LEO satellite carrying only a coronagraph as a payload. In order to get the best science from the Sun, continuous viewing of the Sun is preferred. A Satellite placed in the halo orbit around the L1 Lagrangian point of the Sun-Earth system has the major advantage of continuously viewing the Sun without any occultation/ eclipses. Based on the technical studies, it was found that PSLV-XL developed at ISRO has the capability to launch a satellite which can be placed at a halo orbit around L1 point.

Following instruments have been short-listed for the mission:

  • Visible Emission Line Coronagraph (VELC), IIA, Bengaluru
  • Solar Ultraviolet Imaging Telescope (SUIT), IUCAA, Pune
  • Plasma Analyser Package for Aditya (PAPA), SPL/VSSC, Trivandrum
  • Aditya Solar wind Particle Experiment (ASPEX), PRL, Ahmedabad
  • Solar Low Energy X-ray Spectrometer (SoLEXS), SAG/ISAC, Bengaluru
  • High Energy L1 Orbiting X-ray Spectrometer (HEL1OS), SAG/ISAC, Bengaluru

Launch is planned on a PSLV-XL rocket in the 2019 timeframe, now delayed to 2022.

Nation: India
Type / Application: Science, solar
Operator: ISRO
Contractors: ISRO
Configuration: I-1K (I-1000) Bus ?
Propulsion: LAM engine
Power: 2 deployable solar arrays, batteries
Orbit: Sun-Earth L1
Satellite COSPAR Date LS Launch Vehicle Remarks
Aditya L1 - 2022 Sr PSLV-XL