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The USNO websites aa.usno.navy.mil, ad.usno.navy.mil, aristarchus.usno.navy.mil, maia.usno.navy.mil, rorf.usno.navy.mil, toshi.usno.navy.mil, and tycho.usno.navy.mil are undergoing modernization efforts. The expected completion of the work and the estimated return of service is Fall 2020, subject to change due to potential impacts of COVID-19.
 

For DoD Users

This US Naval Observatory Website is undergoing modernization and will be offline starting Thursday, 24 October 2019. The expected completion of work and return of service is estimated as 30 April 2020. Please visit https://www.usno.navy.mil/USNO/about-us and submit a Requirements Form to the USNO PAO if the information you are seeking is not accessible via another means.

 

 

DoD customers can access all operational data, products and services via the NIPRnet Command Task Group 80.7 site at https://naval.oceanography.navy.mil/ (CAC required), or visit our NIPRnet site directly at https://dod.aa.usno.navy.mil/ (CAC required).

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