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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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