Aditya-L1 Mission Objectives and Orbit

This section analyzes the two statements provided regarding the Aditya-L1 mission to determine their accuracy.

Statement 1 Analysis: Aditya-L1 vs. INSAT Series

Statement 1 claims that the Aditya-L1 mission was launched to replace the INSAT series of weather satellites. Let's examine this:

• The INSAT series (Indian National Satellite system) is a multipurpose satellite constellation used for telecommunications, broadcasting, weather forecasting, and disaster warning services.
• The Aditya-L1 mission, launched by ISRO, is specifically designed for solar observation. Its primary goal is to study the Sun's corona, solar winds, flares, and CMEs (Coronal Mass Ejections), and other solar phenomena.
• Aditya-L1's objective is solar research, not the replacement of the functionalities provided by the INSAT satellites, which cover a much broader range of applications including meteorology.

Therefore, Statement 1 is incorrect.

Statement 2 Analysis: Aditya-L1 Orbit and Purpose

Statement 2 states that Aditya-L1 successfully entered a Halo Orbit around the Lagrange Point 1 (L1) to observe solar activity. Let's verify this:

• The Aditya-L1 spacecraft was indeed placed into a specific orbit around the Sun-Earth Lagrange Point 1 (L1).
• This L1 point is located about 1.5 million kilometers from Earth, situated between the Sun and Earth.
• Orbiting the L1 point allows Aditya-L1 to maintain a relatively stable position and continuously observe the Sun without any obstruction or eclipse from the Earth or Moon. This vantage point is crucial for its scientific objective of studying solar activities.
• The mission successfully achieved this halo orbit in January 2024.

Thus, Statement 2 is correct.

Conclusion on Correct Statements

Based on the analysis of both statements:

• Statement 1 is incorrect because Aditya-L1 is not a replacement for the INSAT series.
• Statement 2 is correct as Aditya-L1 is in a Halo Orbit around L1 for solar observation.

Therefore, only Statement 2 is correct.