The Cosmic Background Imager

1998 September 15

Assembly of the LO system.

Testing one of the HEMT receivers in the laboratory.

Optical telescope used for measuring star positions to align the mount.

Two antennas in their shield cans mounted on the rotating platform.

The elevation drive motor and ball-screw; the hydraulic system for the elevation brake.

Steve Padin debugging the drive control system; Martin Shepherd controlling the telescope through the Sun computer system.

The following photographs were taken at night during optical pointing tests.

Tim Pearson (tjp·, 1998 September 16