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Why is the NISAR (NASA-ISRO Synthetic Aperture Radar) mission designed to revisit the same location every 12 days?
Correct Answer: D — To achieve temporal resolution for global coverage and land deformation monitoring
NISAR's 12-day revisit cycle is designed to achieve the temporal resolution needed for global coverage and land deformation monitoring. This consistent revisiting enables tracking of dynamic phenomena such as earthquakes, landslides, and glacier movements critical for disaster preparedness. NISAR's dual-frequency SAR (L-band and S-band) also supports agriculture, forestry, hydrology, and urban planning applications.