Aditya L1 Mission

By : Neha Dhyani

Updated : Mar 30, 2022, 8:15

The Aditya L1 Mission is going to be India's second space-based astronomy mission after AstroSat (2015) and the first mission to study the Sun. Earlier, this mission was named Aditya-1, and it was meant only to observe the Sun's corona. Now, it is planned to be placed in the halo orbit around the L1 point (the point in the Earth-Sun system that provides an uninterrupted view of the Sun in spite of eclipses) at a distance of 1.5 million km. from the Sun. Thus, it was renamed the Aditya L1 Mission.

The Aditya mission is a national effort with the collaboration of ISRO, IIA, Udaipur Solar Observatory, ARIES, TIFR and some other Indian institutions. Aditya L1 Mission's launch date is expected to be in the middle of 2022.

Aditya L1 Mission Objectives

  1. To understand the Coronal Heating (visual and NIR) and Solar Wind Acceleration.
  2. To study the particle flux emanating from the Sun.
  3. To research the coupling and dynamics of the Solar Atmosphere.
  4. To help track the storms directed towards the earth and predict their impact.
  5. To study the Sun's photosphere (soft and solid X-rays) and chromosphere (UV) and carry out 24/7 imaging of the Sun.
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Importance of Aditya L1 Mission

  1. The Sun is the parent star of our solar system. It's very important to study its weather and environment as it affects the evolution of each celestial body of the solar system.
  2. It will help predict the Earth-directed storms coming from the Sun.
  3. It is important to study the effects of variation in the Solar Weather System. The variations in the weather can change the orbits of the satellites, shorten their lives, damage onboard electronics and cause power cut-offs on Earth.

Challenges Faced in Aditya L1 Mission

  1. The distance between Sun and Earth is huge (approximately 15 crore km).
  2. The chances of the collision of this satellite in space are high since it has moving components.
  3. Though Aditya L1 will be placed quite far from the Sun, the super-hot temperatures and radiations in the sunny weather can adversely affect the mission.

Payloads of the Aditya L1 Mission

  1. VELC (Visible Emission Line Coronagraph): This solar coronagraph is being developed at the IIA. Its optical lens is meant to point towards the centre of the sun at all times. Its main purpose is to study coronal heating and to understand the acceleration of CMEs.
  2. SUIT (Solar Ultraviolet Imaging Telescope): This payload of the Aditya L1 Mission is being designed at IUCAA, Pune. Its objective is to research and assess the Photosphere and Chromosphere of the Sun.
  3. ASPEX (Aditya Solar wind Particle Experiment): This part of the Aditya mission is being developed in PRL, Ahmedabad. Its main purpose is to study the variation of solar wind properties, focus on its spectral characteristics and follow up on its distribution.
  4. PAPA (Plasma Analyzer Package for Aditya): The PAPA instrument is being developed at SPL, located in Thiruvananthapuram. Its main objective is to study the composition of solar wind and conduct its continuous measurement.
  5. SoLEXS (Solar Low Energy X-ray Spectrometer): This instrument is being developed at ISAC, Bangalore. Its purpose is to monitor X-ray Flares.
  6. HEL1OS (High Energy L1 Orbiting X-ray Spectrometer): Designed in ISAC and at PRL in Udaipur, it is meant to observe the dynamic events in the solar corona and eruptions.
  7. Magnetometer: It is being developed by LEOS and ISAC.

The Aditya L1 Mission is an ambitious project by the ISRO. Its success is much awaited as it will add another feather to India's cap and its great contributions to space technology

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FAQs on Aditya L1 Mission

Q.1. What is the Aditya L1 Mission launch date?

The Aditya L1 Mission is likely to launch in the third quarter of 2022.

Q.2. What is the Aditya L1 Mission?

The Aditya L1 Mission is India's first mission to study the Sun.

Q.3. What is the objective of the Aditya L1 Mission?

The objective of the Aditya mission is to study the Corona, Chromosphere and Photosphere of the Sun.

Q.4. Which is the Launch Vehicle that will be used for the Aditya L1 Mission?

The PSLV-XL from Sriharikota will be used for the Aditya L1 Mission.