National Aeronautics and Space Administration

Goddard Space Flight Center

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to determine the mass balance of the polar ice sheets and their contributions to global sea level change.
to obtain essential data for prediction of future changes in ice volume and sea-level.

to measure cloud heights and the vertical structure of clouds and aerosols in the atmosphere.
to map the topography of land surfaces.
to measure roughness, reflectivity, vegetation heights, snow-cover,and sea-ice surface characteristics.