A. Doppler Radar
A.
B. Phased Array Radar
B.
C. Microwave Radar
C.
D. Synthetic Aperture Radar
D.
Correct Answer: D
সঠিক উত্তর: D
Explanation
ব্যাখ্যা
- NISAR stands for NASA-ISRO Synthetic Aperture Radar and is a joint Earth-observing mission between NASA and the Indian Space Research Organisation (ISRO).
- The satellite was launched by ISRO on 30 July 2025 aboard the GSLV-F16 rocket from the Satish Dhawan Space Centre.
- This joint mission represents one of the most significant international partnerships in Earth observation and space science.
- NASA contributed the L-band radar and ISRO provided the S-band radar along with the GSLV launch vehicle.
- The NISAR mission is designed to continuously monitor Earth’s land and ice surfaces using advanced radar imaging.
- It plays a key role in tracking environmental changes such as glacier melting, deforestation, and soil deformation.
- The data helps scientists study the impacts of climate change and manage natural disasters like earthquakes and floods.