Question

Full form of NISAR satellite is

• A. National Indian Satellite for Agricultural Research
• B. NASA ISRO Satellite for Agricultural Research
• C. NASA ISRO Synthetic Aperture Radar
• D. NASA ISRO Synchronised Agricultural Radar

Hint:

NISAR is a joint NASA-ISRO radar mission; expand each letter carefully.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
The question asks what the acronym NISAR stands for. NISAR is a joint Earth observation satellite mission.

Step 2: Key Formula or Approach:
NISAR is short for NASA ISRO Synthetic Aperture Radar. It is a joint satellite mission built by NASA (the US space agency) and ISRO (the Indian Space Research Organisation) to map the Earth's surface using synthetic aperture radar (SAR) technology.

Step 3: Detailed Explanation:
Option (1), National Indian Satellite for Agricultural Research, is a made up name and does not match NISAR.
Option (2), NASA ISRO Satellite for Agricultural Research, gets the agency names right but invents a purpose the mission does not have. NISAR is built for wide Earth observation, not agriculture alone.
Option (3), NASA ISRO Synthetic Aperture Radar, correctly expands each letter: N for NASA, I for ISRO, S for Synthetic, A for Aperture, R for Radar. This matches the real mission name.
Option (4), NASA ISRO Synchronised Agricultural Radar, again invents words that do not match the real expansion.

Step 4: Final Answer:
NISAR stands for NASA ISRO Synthetic Aperture Radar, so option (3) is correct.