Aditya-L1 (Lagrange point 1)
About Aditya L1
Aditya-L1 is a spacecraft mission to study the sun's Corona(crown of the sun). It has been designed and will be built in collaboration between the ISRO (Indian Space Research Organization) and various Indian Research Institutes. It will planned to be launched by PSLV-XL (Polar Satellite Lounch Vehicle) Rocket from the Satish-Dhawan-Space-center Bangalore in April 2020. Aditya-L1 will carry's 244 kg of payload.
What is Lagrangian points?
A Language point is a location in space where the combined gravitational forces of large bodies, such as Earth and moon or Earth and Sun, Lagrangian points are also called Libration points.
L1 point, The L1 point of the Earth-Sun system affords an uninterrupted view of the sun and it is currently home to the SOHO (Solar and Hemispheric Observatory) satellite.
L2 point, The L2 point of the Earth-Sun system was the home to the WMAP( ) spacecraft, current home of planck and future home of James webb space telescope.
L3 point, NASA is unlikely to find any use for the L3 point since it remains hidden behind the sun at all times.
L4 and L5 points, The L4 and L5 points are home to stable orbit so-long as the mass-ratio between the two large masses exceeds 24.96. This condition is satisfied for both the Earth-Sun and Earth-Moon systems and for many other pairs of bodies in the solar system.
L4 and L5 points, The L4 and L5 points are home to stable orbit so-long as the mass-ratio between the two large masses exceeds 24.96. This condition is satisfied for both the Earth-Sun and Earth-Moon systems and for many other pairs of bodies in the solar system.
Instruments of Aditya-L1
1. VELC (Visible Emission Line Coronagraph).
The Corona graph Creates an artificial total solar eclipse in space by blocking the sunlight by an Occultor. This telescope will have capabilities of spectral imaging of the Corona in visible and infrared wavelengths. Total weight of VELC payload will be approximately 170kg.
2. SUIT (Solar Ultraviolet Imaging Telescope).
SUIT will observe the sun between 200-400 Nanometers wavelengths range and it will provides full disk images of different layers of the solar atmosphere by making use of 11 filters. Total weight of SUIT payload will be nearly 35kg.
3. ASPEX (Aditya Solar Wind Particle Experiment).
This payload will helps to understand the solar and interplanetary-processes (like shock effects,wave-particle interaction etc.) in the acceleration and energy of solar wind particles.
4. PAPA (Plasma Analyzer Package for Aditya).
Solar wind is a magnetize plasma consisting of charged particles (protons,alpha particles,electrons and heavier ionized atoms with magnetic field embedded in it) flowing out of the sun in all directions at very high speed(about 400km/second). PAPA aims to at studying the composition of solar winds and velocity distribution. PAPA consists of two sensors:
1. Solar Wind Electron Energy Probe (SWEEP):- It measures the solar wind electron energy spectra and it's velocity distribution in the energy range from 10eV to 3kev (eV=electron Volt).
2. Solar Wind Ion Composition AnalyzeR (SWICAR):- SWICAR does the mass determination of the positively charged-ions using time of flight measurement technique and yields the solar wind Ion Fluxes as a function of direction and energy.
5. SoLEXS (Solar Low Energy X-ray Spectrometer).
SoLEXS payload will aims at monitoring the X-Ray flares (1-30 keV) for studying the heating mechanism of the solar Corona.
6. HEL1OS (High Energy L1 Orbiting X-ray Spectrometer).
It will designs to study hard X-Ray emissions from 10 keV to 150 keV during the impulsive phase of solar flares.
7. Magnetometer.
A Magnetometer payload will measures the variation in magnetic field strength at the halo orbit around L1 point.