OPSC OAS 2024 PrelimsScience & TechnologyQuestion 2
Solved previous year question from the OPSC OAS/OCS 2024 Preliminary Examination (General Studies), with the official answer key and a detailed explanation.
Question
What does NISAR stand for?
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Answer & Explanation
Correct answer: (B) NASA-ISRO Synthetic Aperture Radar
NISAR stands for NASA-ISRO Synthetic Aperture Radar, a joint Earth observation mission between NASA (USA) and ISRO (India).
Key Facts about NISAR
| Aspect | Details |
|---|---|
| Full Form | NASA-ISRO Synthetic Aperture Radar |
| Partnership | Joint mission between NASA and ISRO |
| Launch | Scheduled for 2025 |
| Purpose | Earth observation and monitoring |
| Technology | Dual-frequency Synthetic Aperture Radar (SAR) |
| Frequencies | L-band (NASA) and S-band (ISRO) |
| Applications | Monitoring climate change, ecosystems, natural disasters, ice sheets, groundwater, and land surface changes |
| Orbit | Sun-synchronous polar orbit at \\\~747 km altitude |
| Mission Duration | Minimum 3 years |
