NavCom SF-3050 Rev.B - Manual (Page 200)

SF-3050 User Guide – Rev B
Glossary-198
UTC see Universal Time Coordinated.
WAAS (Wide Area Augmentation System) a US
satellite system that provides a set of corrections for
the GPS satellites, which are valid for the North
American region. They incorporate satellite orbit and
clock corrections.
WADGPS (Wide Area Differential GPS) a set of
corrections for the GPS satellites, which are valid for
a wide geographic area.
WGS-84 (World Geodetic System 1984) the current
standard datum for global positioning and surveying.
The WGS-84 is based on the GRS-80 ellipsoid.
Y-code the name given to encrypted P-code when
the U.S. Department of Defense uses selective
availability.