USA-223

USA-223, known before launch as NRO Launch 32 (NRO L-32), is an American reconnaissance satellite which was launched in 2010. It is operated by the United States National Reconnaissance Office.

Whilst details of its mission are officially classified, amateur observers have identified USA-223 as the fifth Mentor satellite. Mentor spacecraft are used for electronic signals intelligence, and carry large antennas to enable them to intercept radio transmissions. These antennas are believed to have a diameter of around 100 m. Bruce A. Carlson, the director of the NRO, described the spacecraft as being the largest satellite ever launched.

USA-223 was launched by United Launch Alliance, aboard a Delta IV Heavy carrier rocket flying from Space Launch Complex 37B at the Cape Canaveral Air Force Station. The launch occurred at 22:58 UTC on 21 November 2010. Following liftoff the rocket flew East towards a geosynchronous orbit. By 23:05 UTC, official updates on the status of the launch had been discontinued.