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Authorized users click here to continue
New users may click here to register for an account. Note that all registrations will be pre-screened and approved, and proof of US citizenship must be provided prior to creation of an account.
For questions and comments about the SOHDB website, please contact modnavdb-user-admin-list@mitre.org. For login assistance, contact the ModNAV website administrator at gps-web-admin@mitre.org