Prelims: Current events of national and international importance | Science & Technology
Why in News?
Recently, scientists at the Indian Institute of Astrophysics (IIA) successfully generated groundbreaking Doppler velocity images of the solar corona.
Key Technical Mechanism
- The Principle of Doppler Velocity Imaging
- By examining the spectral line shifts in visible light emitted by the corona, researchers can measure the line-of-sight velocity of coronal plasma.
- Shifting wavelengths make it possible to distinguish whether erupting plasma is moving toward or away from the observer (Earth).
- Tracking Coronal Mass Ejections (CMEs)
- Until now, predicting the exact trajectory and propagation vector of CMEs along the Sun-Earth line possessed critical observational gaps.
- VELC's new Doppler mapping capability provides vital vector data to determine whether a solar storm is heading directly toward Earth or bypassing it safely.
Strategic Importance
- Mitigating Interplanetary Risks - Accurate velocity profiles of CMEs safeguard critical space-based assets, communication satellites, power grids, and navigation systems from catastrophic geomagnetic disruptions.
- Deep-Space Observational Autonomy - Demonstrates India’s indigenous prowess in processing complex space-borne spectroscopic datasets and validates Lagrange Point 1 (L1) as an optimal vantage point for uninterrupted, real-time solar monitoring.
Reference
The Hindu | India’s first solar mission Aditya-L1
