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Maritime Safety Data
Maritime Safety Information
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GPS Overview
GPS Constellation
GPS NANUS, Almanacs, OPS Advisories, & SOF
GPS Problem Report Status
Service Interruptions
Technical References
Space Weather
GPS References
FAQ's
GPS Acronyms Abbreviations
GPS Expandable Slot Designations
GPS Operational Advisory Tutorial
GPS Precise Ephemeris Info
GPS SPS Signal Specification, 2nd Edition (June 2, 1995)
GPS Selective Availability
GPS Service Interruptions
L Band Antenna Panel Patterns
NANU Abbreviations and Descriptions
NavCen GPS Advisory
Sea to Air to Space
More Info on GPS.Gov
LRIT Overview
Nav Pubs and Documents
Charts and Supplies
Contact Us/Report a Problem
GPS Expandable Slot Designations
B
D
F
B5=B1F
D5=D2F
F5=F2F
B1=B1A
D2=D2A
F2=F2A
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