space medium mcq

GRACE-FO mission measures temporal gravity field variations to track groundwater depletion and ice mass loss.

  1. True - twin satellites ranging via microwave/laser
  2. False - measures magnetic field
  3. True - single satellite radar
  4. False - optical imaging only

Answer: True - twin satellites ranging via microwave/laser

GRACE Follow-On (2018-) detects mass redistribution via intersatellite distance changes; laser ranging interferometer enhances precision over original GRACE.

Topic Space Missions - Earth Science
Exam Relevance UPSC Prelims, SSC CGL

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