Corrective Optics Space Telescope Axial Replacement replaces High Speed Photometer
Installation
COSTAR replaced the High Speed Photometer during the first Hubble Servicing Mission in 1993. The original WFPC was replaced by the WFPC 2 during the same mission.On 28 December 1993 the robotic arms were instructed by the Space Telescope Science Institute to deploy the mirrors into position. The resulting images confirmed that the COSTAR had corrected the spherical aberration in the primary mirror.