Fill in the Blanks:
NISAR satellite carries dual-frequency radar bands ____ and ____.
Show answer & explanation
Correct answer: C
Explanation
Answer: L and S Bands
Explanation:
- NISAR (NASA-ISRO Synthetic Aperture Radar) is a joint Earth observation mission. It utilizes a dual-frequency radar system:
- L-Band (24 cm wavelength): Developed by NASA (JPL), this band is capable of penetrating through dense forests and vegetation.
- S-Band (12 cm wavelength): Developed by ISRO, this band is particularly effective for monitoring heavy rainfall and coastal regions.
Additional Points:
- Mission Objective: To monitor subtle changes occurring on Earth's surface (such as earthquakes, landslides, and melting ice).
- Coverage: The satellite is capable of mapping the entire Earth every 12 days.
- Cost: It is one of the most expensive Earth observation missions undertaken to date, leveraging the global expertise of both ISRO and NASA.
Potential Questions and Answers:
Question: The NISAR mission is a joint effort between which two space agencies?
Answer: NASA (USA) and ISRO (India).
Question: What type of radar does the NISAR satellite use?
Answer: Synthetic Aperture Radar (SAR), which is capable of capturing clear images even through clouds and in the dark of night.
Question: What is the primary scientific objective of NISAR?
Answer: To study ecosystem disturbances, the melting of ice sheets, and natural hazards (such as volcanic eruptions and earthquakes).