Glossary: X

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  1. A nominal frequency range from 12.5 to 8 GHz (2.4 to 3.75 cm wavelength) within the microwave (radar) portion of the electromagnetic spectrum. X-band is a suitable frequency for several high-resolution radar applications and has often been used for...
  2. Short electromagnetic waves whose wavelengths range from .00001 to 3000 angstroms. Source: NASA (http://earthobservatory.nasa.gov/Glossary)