An engineer is assigned to monitor Earth’s surface changes using radar, even through clouds and at night.
Show answer & explanation
Correct answer: C
Explanation
Correct Answer:
NISAR
Explanation:
The satellite described is NISAR (NASA-ISRO Synthetic Aperture Radar), a joint Earth-observation mission developed by NASA and the Indian Space Research Organisation (ISRO). Equipped with advanced dual-frequency synthetic aperture radar (L-band and S-band), NISAR is designed to measure and monitor changes in Earth's land, ice sheets, and ecosystems with high resolution. Its radar imaging capabilities allow it to operate day and night, regardless of weather conditions or cloud cover.
Key Points:
NISAR is the world's first satellite mission to use two different radar frequencies (L-band and S-band) to track surface deformations less than a centimeter across.
The mission plays a critical role in tracking natural hazards, earthquakes, volcanic activities, landslides, and glacier dynamics.
It utilizes a large 39-foot deployable gold-plated wire mesh antenna reflector.
Important Questions and Answers:
Question: Which two space agencies collaborated to develop the NISAR satellite mission?
Answer: NASA (USA) and ISRO (India).
Question: What are the two radar frequencies utilized by the NISAR satellite?
Answer: L-band and S-band.