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GPS Timing Data and Information

maintained by U.S. Naval Observatory

Coordinated Universal Time (UTC) Time Step (Leap Second)

After December 31st, 2016, GPS will be ahead of UTC by eighteen (18) seconds.

 

Dual-frequency GPS Data in RINEX format from the CDDIS data ftp server

  1. Yesterday's RINEX observation files for USNO receivers (in UNIX compressed format)
  2. Note: This data ftp service and these receivers are not controlled by USNO
  3. RINEX format conversion code (in C): to CGGTTS format and to CGGTTS and USNO formats

 

Timing Data for Individual GPS Satellites (Single frequency C/A code)

  1. Most recent 1 Day
  2. Most recent 7 Days    [UNIX compressed format]   [PC zipped format]
  3. Most recent 30 Days  [UNIX compressed format]   [PC zipped format]
  1. Most recent 1 Day
  2. Most recent 7 Days   [UNIX compressed format]  [PC zipped format]
  3. Most recent 30 Days [UNIX compressed format] [PC zipped format]
  • GPS Time vs. UTC via USNO Master Clock

  1. Most recent 30 Days
  2. Most recent 180 days

Notice Advisories to NAVSTAR Users (NANUs)

  1. Most Recently Issued NANUs
  2. Current Constellation Staus, Planned & Recent Outages

 

General GPS Information

 

Links to Other GPS Data Sources

USNO Master Clock Time
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