A laser altimeter is a device that uses laser beams to measure the distance between the device and a surface. It is commonly used to determine the height or elevation of an object or terrain. Full definition
They combined data from LEND with lunar topography and illumination maps derived from LRO's LOLA instrument (Lunar Orbiter Laser Altimeter), and temperature maps from LRO's Diviner instrument (Diviner Lunar Radiometer Experiment) to discover the greater hydrogen abundance and associated surface conditions on PFS. (sciencedaily.com)
This virtual globe combines a high - resolution satellite map with laser altimeter data and advanced topographic lighting to present the planet Mars as it appears from above. (geekwrapped.com)
To arrive at a carbon map that spans three continents, the team used data from the Geoscience Laser Altimeter System lidar on NASA's ICESat satellite. (nrdc.org)