Aerospace Data Facility-East

Aerospace Data Facility-East (ADF-E), also known as Area 58 and formerly known as Defense Communications Electronics Evaluation and Testing Activity (DCEETA), is one of three satellite ground stations operated by the National Reconnaissance Office (NRO) in the continental United States. Located at Fort Belvoir, Virginia, the facility directs reconnaissance satellites and disseminates their intelligence to other U.S. government agencies.

Source: Wikipedia — Aerospace Data Facility-East (CC BY-SA 4.0)