ICESat-2 Beam Pairs

  • Released Wednesday, February 3, 2016
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Side view of the beam pairs.

The ATLAS lidar on ICESat-2 uses 6 laser beams to measure the earth’s elevation and elevation change. By arranging the beams in three pairs of two, scientists can also determine the slope between the two beams, a key component of determining elevation change along the Reference Ground Track. Each time ATLAS collects data along a particular track, onboard software aims the laser beams so that the Reference Ground Track is always between the two beams, as shown in the animation. This allows scientists to combine the elevation and slope information from two different passes to determine elevation change along the Reference Ground Track.

Top-down view of the beam pairs.

Credits

Please give credit for this item to:
NASA's Goddard Space Flight Center

This page was originally published on Wednesday, February 3, 2016.
This page was last updated on Thursday, October 10, 2024 at 12:16 AM EDT.

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