he fourth Earth-bound manoeuvre of the Aditya-L1 mission has been performed successfully in the early hours of September 15.
| Photo Credit: Twitter/@isro

The fourth Earth-bound manoeuvre of the Aditya-L1 mission has been performed successfully in the early hours of September 15.

“Aditya-L1 Mission:

The fourth Earth-bound manoeuvre (EBN#4) is performed successfully.

ISRO’s ground stations at Mauritius, Bengaluru, SDSC-SHAR and Port Blair tracked the satellite during this operation, while a transportable terminal currently stationed in the Fiji islands for Aditya-L1  will support post-burn operations.The new orbit attained is 256 km x 121973  km,” ISRO posted on X (formerly Twitter). 

The next manoeuvre Trans-Lagragean Point 1 Insertion (TL1I)— a send-off from the Earth— is scheduled for September 19, 2023, around 02:00 Hrs. IST

Aditya-L1 mission pursues the enigma of space weather

After the final manoeuvre on September 19, Aditya-L1 undergoes a Trans-Lagrangian1 insertion manoeuvre, marking the beginning of its 110-day trajectory to the destination around the L1 Lagrange point. Upon arrival at the L1 point, another manoeuvre binds Aditya-L1 to an orbit around L1, a balanced gravitational location between the Earth and the Sun. The satellite spends its whole mission life orbiting around L1 in an irregularly shaped orbit in a plane roughly perpendicular to the line joining the Earth and the Sun.

The Aditya-L1, India’s first solar observatory mission was been successfully launched by the Indian Space Research Organisation (ISRO) on September 2 from the Satish Dhawan Space Centre in Sriharikota.

ISRO said the satellite is healthy and operating nominally. 
| Photo Credit: X/@isro

A day after India’s first solar observatory mission which was launched, the first Earth-bound firing to raise the orbit of the Aditya-L1, was performed on Sunday.

The ISRO Telemetry, Tracking and Command Network Work (ISTRAC) in Bengaluru performed the manoeuvre.

The space agency said the satellite is healthy and operating nominally. “The first Earth-bound maneuvre (EBN#1) is performed successfully from ISTRAC, Bengaluru. The new orbit attained is 245km x 22459 km. The next maneuvre (EBN#2) is scheduled for September 5, 2023, around 03:00 Hrs. IST,” ISRO posted on X (formerly Twitter).

Post its successful launch ISRO said that the Aditya-L1 started generating the power and that the solar panels are deployed.

Following the launch Aditya-L1 stays Earth-bound orbits for 16 days, during which it undergoes 5 manoeuvres to gain the necessary velocity for its journey.

Subsequently, Aditya-L1 undergoes a Trans-Lagrangian1 insertion manoeuvre, marking the beginning of its 110-day trajectory to the destination around the L1 Lagrange point.

Upon arrival at the L1 point, another manoeuvre binds Aditya-L1 to an orbit around L1, a balanced gravitational location between the Earth and the Sun.

The satellite spends its whole mission life orbiting around L1 in an irregularly shaped orbit in a plane roughly perpendicular to the line joining the Earth and the Sun.

In a significant leap for the country’s space exploration endeavours, the Indian Space Research Organisation (ISRO) on Saturday successfully launched its maiden solar mission, Aditya-L1, carrying seven payloads for a detailed study of the sun.

India’s first solar space observatory mission was launched on the Polar Satellite Launch Vehicle (PSLV) XL from the Satish Dhawan Space Centre in Sriharikota at 11.50 am. The separation of Aditya-L1 and its injection into an elliptical orbit around the Earth were successful and took about 63 minutes.

Several politicians across party lines congratulated ISRO on the successful launch of the mission and its importance for science and humanity.

President Droupadi Murmu celebrated the significant milestone as a “historic feat,” underscoring its contribution to expanding our understanding of outer space. She conveyed her sincere congratulations to the dedicated ISRO scientists and engineers for their outstanding achievement and offered her utmost support for the mission’s prosperous outcome.

“The launch of Aditya-L1, India’s first solar mission, is a landmark achievement that takes India’s indigenous space programme to a new trajectory. It will help us better understand space and celestial phenomena. I congratulate the scientists and engineers at ISRO for this exceptional feat. My best wishes for the success of the mission,” President Murumu said.

The launch of Aditya-L1, India’s first solar mission, is a landmark achievement that takes India’s indigenous space programme to a new trajectory. It will help us better understand space and celestial phenomena. I congratulate the scientists and engineers at @isro for this…

— President of India (@rashtrapatibhvn) September 2, 2023

Appreciating the hardworking scientists responsible for this extraordinary accomplishment in India’s space exploration journey, Prime Minister Narendra Modi conveyed his confidence in India’s continued efforts to enhance our “understanding of the universe for the welfare of entire humanity.”

“After the success of Chandrayaan-3, India continues its space journey. Congratulations to our scientists and engineers at ISRO for the successful launch of India’s first Solar Mission, Aditya -L1. Our tireless scientific efforts will continue in order to develop a better understanding of the universe for the welfare of entire humanity,” PM Modi said.

After the success of Chandrayaan-3, India continues its space journey.

Congratulations to our scientists and engineers at @isro for the successful launch of India’s first Solar Mission, Aditya -L1.

Our tireless scientific efforts will continue in order to develop better…

— Narendra Modi (@narendramodi) September 2, 2023

The main opposition party in the Indian parliament, Congress, hailed the launch of Aditya-L1 as a “stupendous achievement” for India, as it shared a timeline of the mission from its conceptualization for understanding the “continuity in the ISRO saga”.

In a post in Hindi on X, the Congress said ISRO has given many opportunities to the country to be proud.

“After Chandrayaan-3, ISRO has again raised the nation’s prestige by successfully launching Aditya L-1,” the party said.

ISRO ने देश को गौरवान्वित होने के अनेक मौके दिए हैं।

चंद्रयान-3 के बाद ISRO ने आदित्य L-1 को सफलतापूर्वक लॉन्च कर फिर से देश का मान बढ़ाया है।

देश के वैज्ञानिकों की इस अभूतपूर्व उपलब्धि पर समस्त कांग्रेस परिवार को गर्व है। ISRO की पूरी टीम को शुभकामनाएं।

जय हिंद pic.twitter.com/xzyKgwxQsh

— Congress (@INCIndia) September 2, 2023

The entire Congress family is proud of this unprecedented achievement of the country’s scientists, it said.  Best wishes to the entire ISRO team, the party added.

In a post on X, Congress general secretary Jairam Ramesh said, “Today’s launch of Aditya-L1 is another stupendous achievement of ISRO and for India!” “While saluting ISRO once again, it is worthwhile recalling the recent timeline for Aditya-L1 to understand the continuity in the ISRO saga,” he said.

Today’s launch of Aditya-L1 is another stupendous achievement of ISRO and for India!

While saluting ISRO once again, it is worthwhile recalling the recent timeline for Aditya-L1 to understand the continuity in the ISRO saga.

2006: Scientists with the Astronomical Society of…

— Jairam Ramesh (@Jairam_Ramesh) September 2, 2023

According to ISRO, Aditya-L1 is the first space-based observatory to study the Sun. The spacecraft, after travelling about 1.5 million km from the Earth over 125 days, is expected to be placed in a Halo orbit around the Lagrangian point L1 which is considered closest to the Sun.

(With inputs from agencies)

Aditya L1 onboard the PSLV-C57 the Satish Dhawan Space Centre in Sriharikota on September 1, 2023 on the eve of its launch. Photo: X/@ISRO via PTI

The European Space Agency (ESA) which had provided crucial support to ISRO to monitor the Chandrayaan-3’s health, will also be supporting Aditya-L1, providing deep space communication services to the mission.

“ESA’s global network of deep space tracking stations and use of internationally recognised technical standards allows us to help our partners track, command and receive data from their spacecraft almost anywhere in the solar system,” said Ramesh Chellathurai, ESA service manager, and an ESA cross-support liaison officer for ISRO.

Mr. Chellathurai added that for the Aditya-L1 mission, ESA is providing support from all three of its 35-metre deep space antennas over Australia, Spain and Argentina, as well as support from the Kourou station in French Guiana and coordinated support from the Goonhilly Earth Station in the UK.

Ground services

ESA said that it was the main provider of ground station services for Aditya-L1. ESA stations will support the mission from beginning to end: from the critical ‘Launch and Early Orbit Phase’, throughout the journey to L1, and then to send commands to and receive science data from Aditya-L1 for multiple hours per day over the next two years of routine operations.

The space agency added that from April to December 2022, ESA and ISRO teams had worked together intensively to evaluate ISRO’s strategy for operating the Aditya-L1 and challenge their new orbit determination software.

“With its experience flying and even rescuing missions at the Lagrange points, ESA was in the perfect position to help ISRO improve their new orbit determination software and demonstrate that it has the fidelity and accuracy that the organisation needs in order to operate a spacecraft at a Lagrange point for the first time,” said ESA flight dynamics expert Frank Budnik.

New Delhi:

As the countdowns begin for the launch of the country’s maiden solar mission — Aditya-L1, Union Home Minister Amit Shah on Friday said that we have reached the Moon and soon will reach near the Sun.

Shifting the focus to its next space odyssey after successfully placing a lander on the moon’s uncharted South Pole region, the Indian Space Research Organisation (ISRO) is all set for the country’s maiden solar mission — Aditya-L1.

“We have achieved many things in 75 years. We have reached the Moon and soon will reach near the Sun. But this is not enough,” Amit Shah said during the ‘Meri Maati Mera Desh’ event.

He further praised the scientists and said that Chandrayaan-3 had reached the South Pole of the Moon.

“Chandrayaan-3 has reached the South Pole of the Moon. The scientists say that the many secrets will be unveiled now…Connecting every person to the development of the country and its future is the challenge the leadership needs to meet,” he added.

The launch of the sun mission is scheduled for Saturday at 1150 IST from the launch pad at Sriharikota, with the launch rehearsal and vehicle internal checks all being completed.

Aditya-L1 is India’s first solar space observatory and will be launched by the PSLV-C57. It will carry seven different payloads to have a detailed study of the sun, four of which will observe the light from the sun and the other three will measure in-situ parameters of the plasma and magnetic fields.

The largest and technically most challenging payload on Aditya-L1 is the Visible Emission Line Coronagraph or VELC. VELC was integrated, tested, and calibrated at the Indian Institute of Astrophysics’ CREST (Centre for Research and Education in Science Technology) campus in Hosakote in collaboration with ISRO.

Aditya-L1 will be placed in a halo orbit around Lagrangian Point 1 (or L1), which is 1.5 million km away from the Earth in the direction of the sun. It is expected to cover the distance in four months’ time.

On August 23, India took a giant leap as the Chandrayaan-3 lander module successfully landed on the moon’s South Pole, making it the first country to have achieved the historic feat and bringing to an end the disappointment over the crash landing of the Chandrayaan-2, four years ago. Overall, India became the fourth country – after the US, China, and Russia – to have successfully landed on the moon’s surface.

(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)

Aditya L1 onboard the PSLV-C57 the Satish Dhawan Space Centre in Sriharikota on September 1, 2023 on the eve of its launch. Photo: X/@ISRO via PTI

India’s first solar observatory mission, named Aditya-L1, will be launched onboard the Polar Satellite Launch Vehicle (PSLV) from the Satish Dhawan Space Centre in Sriharikota at 11.50 am on Saturday.

On Friday, the Indian Space Research Organisation (ISRO) commenced the 23-hour 40-minute countdown for the launch of the Aditya-L1 mission.

Approximately sixty-three minutes after liftoff, the satellite separation is expected to take place as the PSLV will launch the Aditya-L1 spacecraft into a highly eccentric earth-bound orbit at around 12.53 pm.

This PSLV-C57/Aditya-L1 mission can be counted as one of the longest missions involving ISRO’s workhorse launch vehicle. However, the longest of the PSLV missions is still the 2016 PSLV-C35 mission which was completed two hours, 15 minutes and 33 seconds after lift-off.

Long journey

Following the launch, Aditya-L1 will stay in earth-bound orbits for 16 days, during which it will undergo five manoeuvres to gain the necessary velocity for its journey.

“Subsequently, Aditya-L1 undergoes a Trans-Lagrangian1 insertion manoeuvre, marking the beginning of its 110-day trajectory to the destination around the L1 Lagrange point. Upon arrival at the L1 point, another manoeuvre binds Aditya-L1 to an orbit around L1, a balanced gravitational location between the Earth and the Sun,” ISRO said.

Aditya-L1 will stay approximately 1.5 million km away from the earth, directed towards the sun; this is about 1% of the distance between the earth and the sun.

Studying the solar corona

The Aditya L-1 payloads are expected to provide crucial information to understand the problem of coronal heating, coronal mass ejection, pre-flare and flare activities and their characteristics, dynamics of space weather, propagation of particles and fields etc.

The seven payloads onboard the satellite are: Visible Emission Line Coronagraph (VELC), Solar Ultraviolet 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 Advanced Tri-axial High Resolution Digital Magnetometers.

The primary payload is VELC, which was developed by the Indian Institute of Astrophysics (IIA), Bengaluru and is designed to study the solar corona and the dynamics of coronal mass ejections.

The Aditya-L1 satellite placed in the halo orbit around the L1 point has a major advantage of continuously viewing the sun without any occultation or eclipse. It is expected to provide a greater advantage in observing the solar activities continuously.

Tracking solar quakes

“There are certain activities which take place around the sun which we call solar quakes. In the aftermath of these solar quakes, a lot of energetic material from the sun is thrown out. Some of them can be directed towards the earth and they can travel at a maximum speed of 3,000 km per hour and reach the near-earth space within 15 hours,” Ramesh R., the principal investigator of the VELC payload, told The Hindu.

Prof. Ramesh added that once the energetic material reaches the earth, it may not cause any physical damage, but it does have the capability to cripple life on earth.

“Our present-day life scenario depends very much on the stationary satellites which are parked in space be it for our internet connectivity, cell phone or TV connectivity. These charged particle clouds can engulf the satellites and damage all the electronics on board the satellites. Hence, we do not know when the solar quakes will happen, it can happen any time of the day so it is very essential to observe the sun on a 24-hour basis and carry out observations,” Prof. Ramesh added.

Tirupati:

ISRO Chairman S Somanath on Friday visited the Sri Chengalamma Parameshwari temple in Sullurpeta in the run-up to the launch of Aditya-L1 mission and prayed for its success.

Somanath visited the temple at 7.30 am and offered prayers to the deity, said a temple official.

Talking to reporters, the ISRO chief said the Aditya mission will be launched at 11.50 am on Saturday.

He said the solar mission is for studying the Sun and it will take 125 days to reach the exact radius.

Following the Sun observatory mission, the space agency would launch various others including SSLV – D3 and PSLV in the coming days, he added.

About the Chandrayaan-3 mission, Somanath said everything is working well.

Srinivas Reddy, executive officer of Chengalamma Parameshwari temple, told PTI that ISRO officials visiting this temple before rocket launches had become a tradition, which goes back to 15 years.

Somanath had visited the temple on the eve of the Chandrayaan-3 mission also.

(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)

ISRO will use an XL variant of the PSLV to place the Aditya-L1 spacecraft in a low earth orbit. Photo: isro.gov.in

Scientists at the Space Physics Laboratory (SPL) under the Vikram Sarabhai Space Centre (VSSC) here are getting ready to unravel the secrets of the solar wind as the Aditya-L1 mission, meant to study the sun, lifts off in September.

The Plasma Analyser Package for Aditya (PAPA) payload aboard Aditya-L1, one of seven scientific payloads aboard the challenging mission, was developed by the SPL to gain deeper insights into the phenomenon of the ‘solar wind,’ as the constant stream of charged particles from the sun is called.

S. Somanath, Chairman, Indian Space Research Organisation (ISRO), said on Saturday that the mission would lift off from Sriharikota in the first week of September.

Energy of electrons

The SPL’s PAPA payload will study the composition of the solar wind, a senior ISRO official said. “It will look at the energy of electrons and the energy and mass of protons and ions in it. The study will also cover the angular variations,” the official said.

For the SPL, the Aditya-L1 mission is yet another big occasion, coming close on the heels of the Chandrayaan-3 lunar mission on which it had two important scientific payloads. ISRO describes Aditya-L1 as the ‘‘first space-based Indian mission to study the sun’‘ from a halo orbit around the Lagrangian point 1 (L1) of the sun-earth system.

Weighing roughly 8 kg, PAPA shares space on the Aditya-L1 spacecraft with six other payloads developed by sister ISRO units and other scientific establishments collaborating with ISRO. According to ISRO, the payloads are designed ‘‘to study the chromosphere, the photosphere and the outermost layers of the sun using electromagnetic and particle detectors.’‘

ISRO will use an XL variant of the Polar Satellite Launch Vehicle (PSLV) to place the Aditya-L1 spacecraft in a low earth orbit. Mr. Somanath said in Thiruvananthapuram on Saturday that the spacecraft had been integrated with the launch vehicle at Sriharikota. Once launched, it will take 125 days to travel to its destination at L1.

On board the Chandrayaan-3 mission’s Vikram lander which soft-landed on the moon on August 23, the SPL had two payloads; the Chandra’s Surface Thermophysical Experiment (ChaSTE) and the Radio Anatomy of Moon Bound Hypersensitive Ionosphere and Atmosphere (RAMBHA).