U.S. Naval Observatory
H.M. Nautical Almanac Office
International Astronomical Organizations
- IAU: International Astronomical Union
- IERS: International Earth Rotation and Reference Systems Service
- SOFA: IAU Standards of Fundamental Astronomy
- CDS: Centre de Données astronomiques de Strasbourg
Products provided by International Astronomical Organizations
- IERS Earth Orientation data
- IERS Bulletins A, B, C and D description
- IERS Technical Notes
- IAU 2006 series for CIP & CIO
- IAU 2000A nutation series for Δψ
- IAU 2000A nutation series for Δε
Publishers and Suppliers
- The UK Hydrographic Office (UKHO)
- The Stationery Office (TSO) and shop
- U.S. Government Printing Office
- University Science Books
- Willmann-Bell
- Earth and Sky
- Macmillan Distribution
U.S. Navy Links
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