isro.gov.in 2023 live Aditya-L1 Mission Doordarshan Live Telecast

Launch of the Aditya L1 Mission: Live Feeds ISRO at isro.gov.in announced on Friday that the launch countdown for India’s first solar mission, Aditya L1, on the PSLV had begun at Sriharikota. The Sun observation mission will blast out from this spaceport on Saturday at 11:50 a.m. local time.

Aditya’s separation is expected to occur 63 minutes after the rocket lifts off from the second launch pad at Sriharikota, which is significantly longer than the typical PSLV launch profile, which gets the spacecraft into orbit in under 25 minutes from lift-off. The duration of this mission will place it among the longest PSLV flights ever. Comparatively, the launch of eight satellites in February 2016 took only 2 hours and 15 minutes, while the launch of Brazil’s Amazonia satellite and 18 others took more than 1 hour and 55 minutes. Unlike Aditya-L1, both utilised a constellation of satellites in a variety of orbits.

The countdown to the launch of PSLV-C57, carrying India’s first solar space observatory, Aditya-L1, is currently at 1 hour and 47 minutes.

Aditya L1

Aditya means “Sun” in Sanskrit. Aditya L1 is the first Indian space mission dedicated to solar research. The satellite will be put into a halo orbit around the Sun-Earth system’s Lagrange point 1 (L1), which is located around 1.5 million km (roughly 1% of the Earth-Sun distance) from Earth. The Sun is a massive gaseous sphere, and Aditya-L1 will investigate its outer atmosphere. Aditya-L1 will not make a solar landing or even come close to the Sun. The ship’s trajectory takes it directly towards the star.

Aditya L1 shall be the first space based Indian mission to study the Sun. The spacecraft shall be placed in a halo orbit around the Lagrange point 1 (L1) of the Sun-Earth system, which is about 1.5 million km from the Earth. 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. The spacecraft carries seven payloads 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

Science Objectives:

The major science objectives of Aditya-L1 mission are:

• Study of Solar upper atmospheric (chromosphere and corona) dynamics.
• Study of chromospheric and coronal heating, physics of the partially ionized plasma, initiation of the coronal mass ejections, and flares
• Observe the in-situ particle and plasma environment providing data for the study of particle dynamics from the Sun.
• Physics of solar corona and its heating mechanism.
• Diagnostics of the coronal and coronal loops plasma: Temperature, velocity and density.
• Development, dynamics and origin of CMEs.
• Identify the sequence of processes that occur at multiple layers (chromosphere, base and extended corona) which eventually leads to solar eruptive events.
• Magnetic field topology and magnetic field measurements in the solar corona .
• Drivers for space weather (origin, composition and dynamics of solar wind .

The suits of Aditya L1 payloads are expected to provide 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 particle and fields etc.

India is getting ready to launch its first mission to investigate the Sun after successfully landing the Chandrayaan-3 spacecraft on the south pole of the Moon. This mission, known as Aditya L1, is set to blast off from the Second Launch Pad (SLP) at the Satish Dhawan Space Centre in Sriharikota, Andhra Pradesh, on Saturday, September 2 at 11:50 am.

Aditya-L1 is scheduled to enter a halo orbit around one of five Lagrange points if all goes according to plan. These points are often referred to as “parking spots in space” since probes may orbit them in a continuous pattern while conserving fuel. Aditya-L1 should have a clear view of the Sun, allowing it to observe its effects on the local environment around Earth and other planets in real time. So India might join the ranks of nations possessing solar probes.

With Aditya-L1 stationed in this ideal location, scientists will be able to monitor solar activity and its effects on space weather in near real-time, unimpeded by eclipses or occultation. In addition, the spacecraft’s data will aid in determining the causes of space weather and the chain of events that culminate in solar eruptions.