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X

ACRONYM	DEFINITION	CONTRIBUTOR
XB	X-Band	Goddard
XBCTV	X-Band Compatibility Test Van	Goddard
XBP	X-Ray Bright Point	Goddard
XBT	Expendable Bathythermograph	Goddard
XBT	Expandable Bathythermography	CASI
XCP	Expendable Current Profiler	CASI
XDS	X-Ray spectrometer Detector System	Goddard
XMIT	Transmit (or Transmitter)	Langley
XML	Extensible Markup Language	CASI
XMM	High throughput x-ray spectroscopy mission	Goddard
XMM	XRay MultiMirror (telescope)	CASI
XMP	X/Open Management Protocol	Goddard
XPAA	X-Band Phased Array Antenna	Goddard
XPS	XUV Photometer System	Goddard
XPS	Xray Photoelectron Spectroscopy	CASI
XRF	X-Ray Flourescence	Goddard
XRFS	XRay Fluorescence Spectroscopy	CASI
XRP	X-Ray Polychromator	Goddard
XRS	X-Ray Spectrometer	Goddard
X-SAR	X-Band Synthetic Aperture Radar	Goddard
XSAR	XBand Synthetic Aperture Radar	CASI
XSLT	Extensible Style sheet Language Transformations	CASI
XSPEC	X-Ray Spectrum	Goddard
XSS	Experimental Space Station (Orbiting Work Shop)	CASI
XTE	X-Ray Timing Explorer	Goddard
XUV	Xray Ultraviolet	CASI
XXI	XUV/XRay Imager (Orbiting Solar Laboratory)	CASI