ISRO’s Aditya-L1 will join NASA’s Solar and Heliospheric Observatory (SOHO) at L1 point

India’s maiden solar mission, Aditya-L1 will join the Solar and Heliospheric Observatory (SOHO) at the L1 point. Here’s how it compares against NASA and ESA’s premier Sun-watching instrument.

| Updated on: Sep 02 2023, 13:58 IST
ISRO conducts rehearsals for Aditya-L1 launch
1/5 India is all set to launch its first solar mission tomorrow, Aditya-L1. The aim of this mission is to study the Sun. Aditya L1 is expected to provide crucial informations to understand the problem of coronal heating, coronal mass ejection, pre-flare and flare activities and their characteristics, dynamics of space weather, and propagation of particles and fields. (HT_PRINT)
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2/5 According to ISRO, The Aditya-L1 spacecraft has seven payloads to observe the photosphere, chromosphere, and the outermost layers of the Sun (the corona) using electromagnetic and particle, and magnetic field detectors. Four payloads will directly view the Sun and the remaining three payloads will be used to carry out in-situ studies of particles and fields at the Lagrange point L1.  (NASA)
3/5 ISRO has recently announced that the launch rehearsal of Aditya L1 has been completed along with the vehicle's internal checks. ISRO posted on 'X' (formerly Twitter), "PSLV-C57/Aditya-L1 Mission: The preparations for the launch are progressing. The Launch Rehearsal - Vehicle Internal Checks are completed". (NASA)
4/5 ISRO posted on 'X' (formerly Twitter), "PSLV-C57/Aditya-L1 Mission: The preparations for the launch are progressing. The Launch Rehearsal - Vehicle Internal Checks are completed". (SDO/NASA)
5/5 After India’s Successful landing on the lunar surface, the hope from Aditya L1 is high. In an update from ISRO, it has been confirmed by Pragyan Rover that there is presence of Sulphur on Lunar Surface. India became the first country to successfully land on the moon’s south pole. (NASA)
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Aditya-L1 lifted off successfully from Launch Pad 2 of the Satish Dhawan Space Centre on September 2. (AP)

India's maiden solar mission successfully lifted off today, September 2 at 11:50 AM IST from the Satish Dhawan Centre in Sriharikota. The spacecraft, named Aditya-L1, has embarked on a 1.5 million-kilometer journey to the Sun, where it will be placed in the halo orbit around the first Lagrange point (L1) of the Sun-Earth system. Interestingly, Aditya-L1 will join four other spacecraft that are already placed in similar orbits - the Solar and Heliospheric Observatory (SOHO), Advanced Composition Explorer (ACE), Global Geospace Science (GGS) Wind and the Deep Space Climate Observatory (DSCOVR).

Here's how the Indian Space Research Organization (ISRO)'s Aditya-L1 compares to NASA and ESA's Solar and Heliospheric Observatory (SOHO).

Aditya-L1: Details

Aditya-L1 will now travel approximately 1.5 million kilometres to the Sun. The spacecraft will be placed in a halo orbit around the Lagrange 1 (L1) point for a 5-year mission. The mission aims to unravel the mysteries of the Sun, such as the cause behind Coronal Mass Ejections (CMEs), solar flares, solar weather, and more.

According to ISRO, Aditya-L1 is carrying seven payloads to study the photosphere, chromosphere and coronal layer of the Sun, which will be done using electromagnetic and particle directors. All the payloads will help scientists develop a greater understanding of the dynamics of solar weather, problems of coronal heating, pre-flare and flare activities, and more.

The seven payloads are - Visible Emission Line Coronagraph (VELC), Solar Ultra-violet Imaging Telescope (SUIT), Solar Low Energy X-ray Spectrometer (SoLEXS), High Energy L1 Orbiting X-ray Spectrometer (HEL1OS), Aditya Solar wind Particle EXperiment (ASPEX), Plasma Analyser Package for Aditya (PAPA), and Magnetometer (MAG).

Solar and Heliospheric Observatory: Details

The Solar and Heliospheric Observatory or SOHO was launched in 1995 by NASA in collaboration with the ESA, and it began operations in May 1996. It was initially launched as a 2-year mission but has now completed 25 years of service. According to NASA, SOHO aims to study the Sun “inside out”, meaning it has been conducting analyses from its deep core to the outer corona and the solar winds.

SOHO is equipped with 12 scientific instruments, such as an Extreme Ultraviolet Imaging Telescope (EIT), Michelson Doppler Imager (MDI), LASCO (Large Angle and Spectrometric Coronagraph), and others. SOHO captures images of the sun's corona, measures the velocity and magnetic fields of the sun's surface, and observes the faint corona around the Sun.

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First Published Date: 02 Sep, 13:57 IST
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