The Aerial Mapping Camera Calibrator was designed, manufactured, and installed by Boller and Chivens.Larry Steimle of Boller and Chivens with Hill AFB representative with 121 Collimator Aerial Mapping Camera Calibrator

At the console operating 121 Collimator Aerial Mapping Camera Calibrator setup.
In foreground is the camera mounting area with the theodolite collimator
aligning assembly in place. The 121 collimators, each projecting a cross-hair
at known angles +/- 2.0 arc second absolute, and was stable to +/- 1.0 arc second.

Underside looking up  showing the 121 Collimator Distortion Array setup.

This is a photo of the Aerial Mapping Camera Calibrator base during construction.