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      Question

      What technological capability makes the NASA-ISRO NISAR

      satellite unique? 
      A Largest satellite in history Correct Answer Incorrect Answer
      B Powered entirely by solar sail Correct Answer Incorrect Answer
      C Uses dual-frequency SAR for all-weather, day-night earth monitoring Correct Answer Incorrect Answer
      D Capable of planetary communication Correct Answer Incorrect Answer
      E Reusable satellite platform Correct Answer Incorrect Answer

      Solution

      NISAR’s dual-frequency (L-band by NASA and S-band by ISRO) Synthetic Aperture Radar allows it to observe Earth conditions like deformation and soil moisture with high precision regardless of weather or lighting. 

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