Q. Consider the following statements regarding the NASA-ISRO Synthetic Aperture Radar (NISAR) mission:
1.NISAR is a joint Earth-observation mission designed to monitor global environmental changes including ice-sheet collapse and ecosystem disturbances.
2.The L-band Synthetic Aperture Radar (L-SAR), provided by ISRO, is specialized for detecting surface-level features like crop health and wetlands.
3.NASA provides the S-band Synthetic Aperture Radar (S-SAR), which is capable of penetrating dense forest canopies and soil to study biomass.
Which of the statements given above is/are incorrect?
Answer: C
Notes:
Explanation:
Statement 1 is correct. NISAR (NASA-ISRO Synthetic Aperture Radar) is a joint earth-observation mission launched on July 30, 2025, from India, designed to monitor global environmental changes with high-resolution radar. Using dual-band SAR, it monitors ice-sheet collapse, ecosystem disturbances, and natural hazards like earthquakes and volcanic eruptions, providing data to help with climate change studies.
Statements 2 and 3 are incorrect: The roles are swapped: NASA provides the L-band (long wavelength, high penetration for biomass/ice) and ISRO provides the S-band (shorter wavelength, for surface features/agriculture).
