Silentbarker

Silentbarker is a class of classified United States spy satellites for space domain awareness developed by US Space Force and National Reconnaissance Office.

In December 2025, USSF System Delta 89 announced that it was seeking a new satellite to replace the Silentbarker series. The USSF has also said it intends not to partner with the National Reconnaissance Office (NRO) for the replacement.

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