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India's 1st mission to study the sun launches Sept. 2 [updated]


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India is gearing up for its first-ever mission to study the sun. 

The mission's observatory, called Aditya-L1 ("Aditya" means "sun" in Sanskrit), has arrived at its launch site on the island of Sriharikota, on India's east coast, and is due to launch on Sept. 2, according to the Indian Space Research Organisation (ISRO), India's national space agency.

The ISRO announced the planned launch date on X (formerly known as Twitter) on Aug. 28, several weeks after sharing the first pictures of the spacecraft on Aug. 13.

https://www.livescience.com/space/space-exploration/indias-1st-mission-to-study-the-sun-launches-sept-2

The Aditya-1 solar mission launches hot on the heels of India's first moon landing.

 

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How is ESA supporting ISRO’s Aditya-L1 solar mission?

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The Indian Space Research Organisation (ISRO) plans to launch its Aditya-L1 solar observatory from Satish Dhawan Space Centre in Sriharikota Range (SDSC SHAR), India, at 11:50 IST (08:20 CEST) on 2 September 2023.

It’s an ambitious mission that will generate vast quantities of science data as the spacecraft balances in an unstable orbit. With its global network of deep space ground stations and experience flying similar missions, ESA has just the right infrastructure and expertise to provide support.

Read More: ESA

 

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Excellence!

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Aditya L1 takes trajectory correction in its journey to the L1 point 1.5 million kilometers away.

https://indianexpress.com/article/technology/science/aditya-l1-mission-isro-corrects-trajectory-to-l1-point-8973692/

 

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As India’s first solar mission Aditya L1 continues its 110-day journey towards the L1 point which is 1.5 million kilometres away, the Indian Space Research Organisation (ISRO) on Sunday updated that a Trajectory Correction Manoeuvre (TCM) was performed earlier in the week.

The space agency said this was “originally provisioned” for.

The spacecraft propulsion system was fired for 16 seconds on October 6 to correct its trajectory towards the L1 point. The space agency said that the manoeuvre “was needed” to correct the trajectory of the spacecraft was evaluated after it was inserted in the path towards the L1 point on September 19.

One of the seven instruments on-board — the magnetometer — will be turned on again “within a few days,” they said. The instrument is meant to study the interplanetary magnetic field.

 

 

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  • The title was changed to India's 1st mission to study the sun launches Sept. 2 [updated]
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Aditya-L1: India's Sun mission reaches final destination

India's first solar observation mission has reached its final destination.

On Saturday, Aditya-L1 reached the spot in space from where it will be able to continuously watch the Sun.

The spacecraft has been travelling towards the Sun for four months since lift-off on 2 September.

https://www.bbc.co.uk/news/world-asia-india-67871797

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Aditya L1's mission life is 5 years and has 7 scientific payloads to study the Sun.

https://www.business-standard.com/india-news/aditya-l1-s-mission-life-is-5-years-7-payloads-to-study-sun-all-details-124010800880_1.html

 
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"The scientific objectives of Aditya-L1 mission include the study of coronal heating, solar wind acceleration, Coronal Mass Ejections (CME),dynamics of the solar atmosphere and temperature anisotropy," the Isro explained. Launched on September 2 last year, the spacecraft, placed in its specific halo-orbit is expected to have a mission life of five years, according to the Isro.


 

 

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 ISRO's Aditya-L1 will track the Sun on Monday as it gets completely cloaked by the Moon during the Total Solar Eclipse.

https://www.hindustantimes.com/science/total-solar-eclipse-today-april-8-2024-isros-aditya-l1-to-track-the-sun-during-darkness-101712535333181.html

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India's solar probe Aditya L1 will track the behaviour and rays of the Sun on Monday, April 8, during the total solar eclipse. During this time, the Sun will briefly get completely cloaked by the Moon, creating a moment of complete darkness in several countries.

Aditya L1, which is the Indian Space Research Organisation's (ISRO) maiden solar mission, is in a position to track the Sun during the total solar eclipse. This will help the ISRO further study the chromosphere and corona of the star.

Aditya L1 will use two of its six instruments to track the Sun during the solar eclipse. These two instruments are the Visible Emission Line Coronagraph (VELC) and the Solar Ultraviolet Imaging Telescope (SUIT).

 

 

 

 

Edited by Ajay0
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Aditya mission continuously sending data about sun : ISRO

https://www.telegraphindia.com/india/aditya-l1-solar-mission-continuously-sending-data-about-sun-isro-chief-s-somnath/cid/2014895

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Somnath, who was speaking to reporters here after being conferred a special award by jewellery major P C Chandra Group, said several instruments of the spacecraft are working continuously to feed data on many aspects."We are looking into the sun in a continuous manner - UV magnetic charges observation, corona graph observation, X-ray observation and other things," he said.

"As we are keeping this satellite for five years, the observation will be analysed as a long-term measure. "

 
 
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Aditya-L1’s SUIT and VELC Capture Solar Fury
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June 10, 2024

The Active region AR13664 on the Sun, during its passage during the week of May 8 – 15, 2024, erupted several X-class and M-class flares, which were associated with Coronal Mass Ejections (CMEs) during May 8 and 9. These produced a major geomagnetic storm on May 11, 2024. Two of the remote sensing payloads on board Aditya-L1 (SoLEXS and HEL1OS) captured these events during May 8-9, 2024 while the two in-situ payloads (ASPEX and MAG) captured this event during May 10-11, 2024 during its passage through L1. These observations were subsequently reported by ISRO, along with the observations made by the Chandrayaan-2 spacecraft, XPoSat as well as by USO-PRL ground-based facility.

Read More: ➡️ ISRO

Related stories:

 

 

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ISRO’s Aditya-L1 Completes First Halo Orbit Around Sun-Earth L1 Point In 178 Days
 

https://ddnews.gov.in/en/isros-aditya-l1-completes-first-halo-orbit-around-sun-earth-l1-point-in-178-days/

 

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India’s first solar mission Aditya-L1 spacecraft completed its first halo orbit around the Sun-Earth L1 point on Tuesday, the Indian Space Research Organisation (ISRO) said in a statement. The Aditya-L1 mission is an Indian solar observatory at Lagrangian point L1, launched on September 2 last year and was inserted in its targeted halo orbit on January 6.

Aditya-L1 spacecraft in the Halo orbit takes 178 days to complete a revolution around the L1 point. During its travel in the halo orbit, the spacecraft will be subjected to various perturbing forces that will cause it to depart from the targeted orbit, the ISRO stated.

Further, it underwent two station-keeping manoeuvres on February 22 and June 7, respectively, to maintain this orbit. Today’s third station-keeping manoeuvre has ensured that its travel continued into the second halo orbit path around L1.

“This journey of Aditya L1 around Sun-Earth L1 Lagrangian point involves modelling of complex dynamics,” it said. The understanding of various perturbing forces acting on the spacecraft helped in determining the trajectory accurately and planning precise orbit manoeuvres.

However, with today’s manoeuvre, the state-of-the-art flight dynamics software developed in-house at URSC-ISRO for the Aditya-L1 missions stands fully validated, according to the ISRO. Further, the ISRO detailed the trajectories marked in the figure.

 

 

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Interesting article on why Aditya was placed around Lagrange point.

https://indianexpress.com/article/upsc-current-affairs/upsc-essentials/isros-aditya-l1-why-was-it-placed-around-lagrange-point-1-9541817/

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Placing Aditya L1 in a halo orbit (around L1-point) allows continuous, and uninterrupted observation of the Sun without Earth’s shadow interference, providing a stable point for solar monitoring. In contrast, a Low Earth Orbit (LEO) would subject the spacecraft to periodic eclipses and limited viewing windows, reducing observation efficiency and data continuity. 

The L1 location significantly reduces the influence of Earth’s atmosphere and magnetic field, thereby improving the quality of solar data collected compared to LEO (just a few hundred kilometres away from the Earth). Being located at the L1 point allows Aditya-L1 to monitor solar activities before they reach Earth. This early detection capability is crucial for space weather forecasting, providing advanced warnings that can protect satellites, power grids, and communication systems on the Earth. 

A satellite in LEO would not be able to provide early detection of solar events as effectively. Thus, the mission benefits from continuous solar observation, minimal atmospheric interference, stable thermal conditions, and enhanced ability to monitor and predict space weather events. SOHO (Solar and Heliospheric Observatory) is in halo orbit (around L1 point), allowing it to continuously observe the Sun. 

 

 

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