India's Aditya-L1 Mission's VELC Payload to Snap 1,440 Solar Images Daily

India's upcoming Aditya-L1 solar mission, launching on September 2, features the Visible Emission Line Coronagraph (VELC) as its primary payload.

| Updated on: Sep 02 2023, 10:04 IST
Aditya L1 launch in just 2 days! Check latest updates on ISRO mission
1/6 Indian Space Research Organisation (ISRO) is launching Aditya L1 on September 2, 2023 from Andhra Pradesh's Sriharikota at 11:50 AM IST. The mission is based on studying the impact of Sun's activities on space weather. (NASA / GSFC / SDO)
2/6 According to ISRO, the spacecraft will be placed in “halo orbit around the Lagrange point 1 (L1) of the Sun-Earth system”. It will contain a total of seven payloads that will study the different phenomena of the sun's activity such as solar storms, solar flares, coronal mass heating, and more. (NASA)
3/6 The seven payloads are designed to study the Sun’s photosphere, chromosphere, and the outermost layers with the help of electromagnetic particle, and magnetic field detectors. (NASA/Johns Hopkins APL/Steve Gribben)
4/6 ISRO shared that the mission site is about 1.5 million km distance from the Earth and it will take four months for the spacecraft to reach the Lagrange point 1.  (SDO/NASA)
5/6 When Aditya L1 exits the Earth's gravitational sphere of Influence,  it will enter its "cruise phase" and be inserted into a large halo orbit encircling the L1 position. (NASA)
6/6 The Earth-Sun system has five  Lagrange points which are required for the study purposes. However, the L1 point will enable researchers to study without any interruption including the solar eclipse.   (Pixabay)
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Aditya-L1 VELC will transmit a remarkable 1,440 solar images daily for analysis, aiding in the study of the Sun's corona and solar phenomena. (Representative image) (HT_PRINT)

Aditya-L1, India's groundbreaking solar mission, will deploy the Visible Emission Line Coronagraph (VELC) as its central instrument. VELC's mission is to provide a wealth of solar images daily, contributing to the understanding of the Sun's corona and its behavior. The mission is set to launch on September 2. Check highlights:

1. The Aditya-L1 mission, India's maiden solar expedition, is set to launch on September 2, following the recent success of Chandrayaan-3.

2. The mission's primary payload, the Visible Emission Line Coronagraph (VELC), will transmit 1,440 images daily to ground stations for analysis once it reaches its intended orbit.

3. VELC, considered the most significant and technically challenging payload on Aditya-L1, was developed and calibrated in collaboration with the Indian Institute of Astrophysics (IIA) at their CREST campus in Hoskote, near Bengaluru.

4. The Aditya-L1 mission will be launched using the PSLV-C57 rocket on September 2 at 11:50 AM.

5. The mission is equipped with seven payloads, with four designed to observe the Sun's light and three dedicated to in-situ measurements of plasma and magnetic fields.

6. Aditya-L1 will be positioned in a halo orbit around Lagrangian Point 1 (L1), situated 1.5 million kilometers from Earth in the direction of the Sun, ensuring continuous solar observation without eclipses.

7. VELC's imaging channel will provide one image per minute, totaling around 1,440 images over 24 hours.

8. IIA will host the VELC Payload Operations Centre (POC), which will receive raw data from ISRO's Indian Space Science Data Centre (ISSDC) for further processing and scientific analysis before dissemination.

9. A specialized software developed by IIA will automatically detect coronal mass ejections and provide timely information to the scientific community within 24 hours.

10. The VELC payload, weighing 190 kg, is expected to send images for the nominal five-year lifespan of the satellite, with the possibility of an extended mission depending on fuel consumption.

11. VELC includes four channels, with the continuum channel independently sending 1,440 images per day, while the other spectroscopy channels provide images as needed.

12. The first images from Aditya-L1 are anticipated to be available by the end of February, with the satellite set to be placed into orbit in mid-January and subsequent testing and instrument activation.

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First Published Date: 02 Sep, 10:04 IST