Aditya L1 successfully undergoes fourth earth-bound manoeuvre: ISRO
Bengaluru (PTI): Aditya L1 spacecraft, India's first space-based mission to study the Sun, during the early hours on Friday, underwent the fourth earth-bound manoeuvre successfully, ISRO said.
"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 space agency said in a post on X, a platform formerly known as Twitter.
The new orbit attained is 256 km x 121973 km, it said: "The next manoeuvre Trans-Lagragean Point 1 Insertion (TL1I) -- a send-off from the Earth -- is scheduled for September 19, around 02:00 Hrs. IST." Aditya-L1 is the first Indian space-based observatory to study the Sun from a halo orbit around the first Sun-Earth Lagrangian point (L1), which is located roughly 1.5 million km from the Earth.
The first, second and third earth-bound manoeuvre was successfully performed on September 3, 5 and 10 respectively.
The manoeuvres are being performed during the spacecraft's 16-day journey around the Earth during which the spacecraft will gain the necessary velocity for its further journey to L1.
With the completion of four earth-bound orbital manoeuvres, Aditya-L1 will next undergo a Trans-Lagrangian1 insertion manoeuvre, marking the beginning of its nearly 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.
ISRO's Polar Satellite Launch Vehicle (PSLV-C57) on September 2 successfully launched the Aditya-L1 spacecraft from the Second Launch Pad of Satish Dhawan Space Centre (SDSC), Sriharikota.
After a flight duration of 63 minutes and 20 seconds that day, the Aditya-L1 spacecraft was successfully injected into an elliptical orbit of 235x19500 km around the Earth.
According to ISRO, a spacecraft placed in the halo orbit around the L1 point has the major advantage of continuously viewing the Sun without any occultation /eclipses.
This will provide a greater advantage in observing solar activities and their effect on space weather in real-time.
Aditya-L1 carries seven scientific payloads indigenously developed by ISRO and national research laboratories, including the Indian Institute of Astrophysics (IIA) in Bengaluru and the Inter-University Centre for Astronomy and Astrophysics (IUCAA) in Pune.
The payloads are to observe the photosphere, chromosphere and the outermost layers of the Sun (the corona) using electromagnetic particle and magnetic field detectors.
Using the special vantage point L1, four payloads directly view the Sun and the remaining three payloads carry out in-situ studies of particles and fields at the Lagrange point L1, thus providing important scientific studies of the propagatory effect of solar dynamics in the interplanetary medium.
The suits of Aditya L1 payloads are expected to provide the most crucial information 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.
According to scientists, there are five Lagrangian points (or parking areas) between the Earth and the Sun where a small object tends to stay if put there. The Lagrange Points are named after Italian-French mathematician Joseph-Louis Lagrange for his prize-winning paper -- "Essai sur le Probleme des Trois Corps, 1772." These points in space can be used by spacecraft to remain there with reduced fuel consumption.
At a Lagrange point, the gravitational pull of the two large bodies (the Sun and the Earth) equals the necessary centripetal force required for a small object to move with them.
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'Engineered narratives': West Bengal guv on alleged molestation charges against him
Kolkata, May 2: West Bengal Governor C V Ananda Bose on Thursday said he will not be cowed down by “engineered narratives” and the "truth shall triumph” after TMC leaders claimed that a woman working at Raj Bhavan levelled allegations of molestation against him.
In a statement, the Governor said, “Truth shall triumph. I refuse to be cowed down by engineered narratives. If anybody wants some election benefits by maligning me, God bless them. But they cannot stop my fight against corruption and violence in Bengal,”
To the Raj Bhavan staff "who expressed solidarity with him following some derogatory narratives that were circulated by two disgruntled employees as agents of political parties," a communication by Raj Bhawan said.
The Governor’s statement came after senior TMC leaders claimed this evening in a series of social media posts that the woman, who had levelled the allegations, has been taken to a police station to complain against Bose.
Though police sources said they received a verbal complaint, there was no official word on whether a formal complaint had been registered.
“BIG. Bengal governor CV Ananda Bose was accused of molesting a woman. How utterly appalling and Horrifying. Ahead of @narendramodi visit to Kolkata who is supposed to stay overnight at Raj Bhavan, a woman has alleged that she was molested while she went to meet the Governor at Raj Bhavan today. The complainant has been taken to the Hare Street police station for filing a complaint. The woman has accused the Governor of molesting her. Shocking and disgraceful,” TMC Rajya Sabha MP Sagarika Ghose said in a post on X.
Fellow TMC MP Saket Gokhale also posted on his X account regarding the issue.
West Bengal Women and Child Development Minister Shashi Panja said it is “shameful” that the Governor has maligned his post and has used it to “torture a woman”.
“It is appalling and shocking to see such an incident. This is the same Governor who had reached out to Sandeshkhali to talk about women’s rights and Nari Shakti. This is shameful that the Governor sought undue advantages in the pretext of giving her a permanent job. We want Prime Minister Narendra Modi who will be addressing rallies in Bengal tomorrow to react on this issue,” she said.
According to sources in the Governor's House, the "woman employee with the help of her alleged boyfriend who is also an employee of the Raj Bhavan was blocking complaints (from people) being sent to the Election Commission of India.
"When she was reprimanded for that, she went outside and alleged molestation. She is in the habit of throwing tantrums against her colleagues because of some disease," a Raj Bhavan official said.
The West Bengal Governor and the TMC government have shared an acrimonious relationship since he assumed office in November 2022 and had several run-ins on various issues.
The BJP said it has to be seen whether this a “conspiracy by the TMC” or has an “iota of truth in it”.
“We all know that the TMC is politically cornered on the issue of SSC scam and is looking for a breathing space. So this needs to be seen whether this is a conspiracy by the TMC or it has any iota of truth in it,” BJP leader Suvendu Adhikari said.
BIG. Bengal governor CV Ananda Bose accused of molesting a woman. How utterly APPALLING and HORRIFYING. Ahead of @narendramodi visit to Kolkata who is supposed to stay overnight at Raj Bhavan, a woman has alleged that she was molested while she went to meet the Governor at Raj…
— Sagarika Ghose (@sagarikaghose) May 2, 2024
Shameful that a constitutional office holder should try to prejudice an impartial investigation by attacking the motive of the complainant. We have seen this happen in that infamous Saturday Hearing of the Supreme Court. Respect women! https://t.co/E6eJLQvFXO
— sanjoy ghose (@advsanjoy) May 2, 2024
