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GPS-based Products

USNO, as an International GNSS Service (IGS) Analysis Center, provides GPS-based products such as Rapids, Ultras (Ultra-rapids), and UTGPS.  To learn more about how to use these products, click here.


24-hr sets of GPS satellite orbits, satellite- and receiver clock solutions, and earth-orientation parameters. Computed by USNO's IGS Analysis Center every 24 hours.


48-hour sets (24 hours past, 24 hours predicted) of GPS satellite orbits, satellite clock solutions, and earth orientation parameters. Computed by USNO's IGS Analysis Center every six hours.


A GPS-based UT1-like quantity used for extrapolating UT1-UTC past the most recent VLBI measurement. One value per 24 hours; estimated daily.  |  |  Navy FOIA  |  DoD Accessibility/Section 508  |  No Fear Act  |  Open Government  |  Plain Writing Act  |  Veterans Crisis Line  |  DoD Safe Helpline  |  Navy SAPR  |  NCIS Tips  |  Privacy Policy  |  Contact Webmaster
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