EM 1110-2-2907
1 October 2003
W
Watt (W)
Unit of electrical power equal to rate of work done by one ampere under
a potential of one volt.
Wavelength
Distance between successive wave crests or other equivalent points in
a harmonic wave.
Wien's displacement law
Describes the shift of the radiant power peak to shorter wavelengths as
temperature increases.
WRS--Worldwide
The WRS is a global indexing scheme designed for the Landsat
Reference System
program based on nominal scene centers defined by path and row
X
X band
Radar wavelength region from 2.4 to 3.8 cm.
Y
Yaw
Rotation of an aircraft about its vertical axis so that the longitudinal axis
deviates left or right from the flight line.
Z
ZENITH
Zenith is the point on the celestial sphere vertically above a given
position or observer.
Zephyr
A Mediterranean term for any soft, gentle breeze.
Glossary-31
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