Aditya L1 successfully undergoes the second earth-bound manoeuvre: ISRO
Bengaluru (PTI): Aditya L1, the first space based Indian mission to study the Sun underwent the second earth-bound manoeuvre successfully, during the early hours on Tuesday, ISRO said.
ISRO's Telemetry, Tracking and Command Network (ISTRAC) carried out the operation.
"The second Earth-bound manoeuvre (EBN#2) is performed successfully from ISTRAC, Bengaluru. ISTRAC/ISRO's ground stations at Mauritius, Bengaluru and Port Blair tracked the satellite during this operation. The new orbit attained is 282 km x 40225 km," ISRO said in a post on X (formerly Twitter).
The next manoeuvre (EBN#3) is scheduled for September 10, 2023, around 02:30 Hrs. IST, it said.
Aditya-L1 is the first Indian space based observatory to study the Sun from a halo orbit around first sun-earth Lagrangian point (L1), which is located roughly 1.5 million km from earth.
The first earth-bound manoeuvre was successfully performed on September 3.
The spacecraft will undergo two more earth-bound orbital manoeuvres before placing in the transfer orbit towards the Lagrange point L1. Aditya-L1 is expected to arrive at the intended orbit at the L1 point after about 127 days.
ISRO's Polar Satellite Launch Vehicle (PSLV-C57) on September 2 had 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, Aditya-L1 spacecraft was successfully injected into an elliptical orbit of 235x19500 km around the earth.
According to ISRO, a satellite 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 of observing the solar activities and its effect on space weather in real time.
Aditya-L1 carries seven scientific payloads indigenously developed by ISRO and national research laboratories including Indian Institute of Astrophysics (IIA), Bengaluru, and Inter University Centre for Astronomy and Astrophysics (IUCAA), Pune.
The payloads are to observe the photosphere, chromosphere and the outermost layers of the Sun (the corona) using electromagnetic and 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, 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 Problème 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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VHP warns of statewide stir in Karnataka against move to ease cattle transport law
Udupi (Karnataka) (PTI): The VHP on Saturday demanded the immediate withdrawal of a proposed amendment to the Karnataka Prevention of Slaughter and Preservation of Cattle Act, 2020, accusing the state government of weakening a law that has deterred illegal cattle transport.
The organisation's Go Raksha Wing, Karnataka South, has also announced district-level protests on December 8.
According to officials, the existing law mandates a bank guarantee for securing the release of vehicles seized for alleged illegal cattle transportation.
On December 4, the state Cabinet proposed an amendment enabling the release of such vehicles on an indemnity bond instead.
Addressing reporters in Udupi, VHP leader and Prantha Goraksha Pramukh Sunil K R, said the government's move amounted to "sympathy for cattle lifters" and claimed that it was part of broader actions "targeting Hindus".
He argued that the law in its current form is stringent and has played a crucial role in reducing incidents of illegal cattle transport and theft.
Under the Act, vehicles involved in offences can be surrendered and, upon conviction, permanently seized by authorities. "Diluting these provisions will embolden offenders," Sunil said.
The VHP leader warned that easing the process of vehicle release would not only encourage violators but also result in rising cruelty against cattle.
Sunil further claimed that the strict enforcement of the 2020 law had brought down cases of cattle-related offences significantly. Rolling back these provisions, he said, could reverse those gains and would lead to an increase in illegal transport.
He reiterated that the government must reconsider its decision and preserve the integrity of the existing law.
