Earth  ID: 20024

ICESat Data Accumulation Animation

Accumulating Data: Glas Builds Its Facts One Point at a Time - The technology behind GLAS is called lidar. Lidar is a distance measuring system similar to radar, except that instead of radio waves it uses pulses of laser light for range finding. The name is a contraction based on the words light and radar: Light Detection And Ranging. A lidar system determines precise distances by measuring the amount of time necessary for a pulse of light to leave an emitter, hit a target, and return. In this case, distance measurements helped researchers determine changes in ice thickness, vegetation, cloud thickness, and much more.

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Animation Credits

Susan Twardy (HTSI): Lead Animator
Michael Starobin (HTSI): Writer
Please give credit for this item to:
NASA/Goddard Space Flight Center Conceptual Image Lab

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Ice, Cloud, and land Elevation Satellite (ICESat)

SVS >> Byrne
SVS >> Gonnelli
SVS >> Ice
SVS >> Lidar
SVS >> Measuring Ice
DLESE >> Technology
GCMD >> Earth Science
NASA Science >> Earth

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version