Langbroek and astronomer Cees Bassa, identified the specific classified spysat (USA-224, a KH-11 satellite with an objective mirror as large as the Hubble Space Telescope) that had taken the photograph, and the time when it was taken on a particular satellite pass.
Astronomers Langbroek and Cees Bassa pinpointed the exact classified spy satellite (USA-224, a KH-11 with an objective mirror comparable to the Hubble Space Telescope) that had taken the photograph, along with the time it was captured during a specific satellite pass.