Aditya L1 final destination holds 3 NASA, 1 NASA-ESA spacecraft, ISRO conducts situational awareness India News


Bengaluru: As Aditya-L1India’s first solar mission on its way to its final destination Isro have analyzed situational awareness of location, the L1 point.
To date, L1 has four spacecraft in halo orbit: NASA’s Wind, Advanced Composition Explorer (ACE) and Deep Space Meteorological Observatory (DSCOVER), while the fourth, the Solar and Heliospheric Observatory (SOHO), is a joint mission of NASA and the European Space Agency (ESA).
Lagrange points, also known as liberation points, are unique locations in space where the gravitational force of two large bodies (e.g. Sun and EarthISRO said that this is exactly equal to the centripetal force required to propel a small object (such as a spacecraft) along.
He added that this makes Lagrange points an ideal location for spacecraft as the orbit is optimized and hence fuel requirements, which are required to maintain the desired orbit, are kept to a minimum. .

ISRO’s ‘Aditya L1’ solar mission takes a major step towards the Earth-Sun L1 point

“For any combination of two orbiting bodies (such as the Sun-Earth and Earth-Moon systems), there are five Lagrange points (L1 through L5), all in the orbital plane of the two larger bodies. The three points — L1, L2 , and L3—are dynamically unstable and lie on the line through the centers of the two major entities, while the other two points—L4 and L5—are stable points and each serves as a third vertex of Eq. A triangle is formed with the centers of major institutions,” ISRO said.
L1 is particularly important because it lies between the two primaries (Sun and Earth), making it an ideal location for spacecraft because of continuous observations of primary bodies, continuous communication with Earth, and unobstructed celestial bodies. Allow viewing.
These orbits are suitable for science missions like Aditya, which will operate like a solar observatory around L1 and communicate with Earth.
“Despite the extremely low population and wide separation between the L1 points, close approach evaluation is essential for an operational spacecraft at Lagrange Point Orbit (LPO) because of the large uncertainties and sensitivity to other perturbing forces, Isro said.
Orbit determination (OD) for LPO, it said, requires tracking to collect data over an extended period of time, typically a few days. Typical OD accuracy is of the order of a few kilometers.
“For Aditya-L1, Isro plans to conduct such analysis from time to time to ensure safety and avoid any possibility of close approach with other neighboring spacecraft in collaboration with NASA-JPL,” Isro added.
Aditya-L1 will operate in a ‘halo orbit’ around the Sun-Earth L1 point, which is approximately 1.5 million km from Earth.
“Halo orbits are periodic, three-dimensional orbits around a Lagrange point (L1, L2 or L3) and include a component of out-of-plane motion relative to the parent body. The size of the orbit is large enough to be continuous with Earth. can be seen and a halo will be seen forming around the Lagrange points (here L1 for Aditya L1),” ISRO said.
Various past missions have used the L1 point, including the International Sun-Earth Explorer (ISEE-3), the Genesis mission, ESA’s LISA pathfinder, China’s Chang’e 5 lunar orbiter, and NASA’s Gravity. Recovery and Interior Recovery (GRAIL) are included. missions, all of which have contributed to the understanding of space and the ability to monitor space weather events.
And operational spacecraft currently deployed there are also providing critical early warnings of adverse space weather events that help protect orbiting space assets and ground-based structures.
Watch ISRO’s ‘Aditya L1’ solar mission takes a major step towards the Earth-Sun L1 point



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