The calibrations were developed in a step process. First, aperture photometry was completed for field star frames at airmasses ranging from ~1 to ~1.6 for each of the Stromgren uvby color bands. Airmass coefficients were then developed corresponding to each color band. These coefficients were applied and used to correct all the stars in every frame for airmass distortion for that night. Calibration equations were then developed from the field star standards as follows