Abstract
This article discusses that starting in 2001, scientists will be able to use the Geoscience Laser Altimeter System (GLAS) to obtain data on the effects of global warming at the north and south poles. GLAS includes a laser system to measure distance, a device to receive signals from Global Positioning System satellites, and a star-tracker altitude-determination system. The laser will transmit four-nanosecond pulses of infrared light at a wavelength of 1064 nanometers and visible (green) light at 532 nm. FEMAP's graphic capabilities allow scientists to provide general views of our finite-element models, animated mode shapes, and 3D assembly views of projects we are working on, such as GLAS.
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