Canadian Brewer Spectrometer Network

UF results in a UV scan being done in the ascending wavelength direction only. The zenith prism is rotated to the UV dome, FW#2 is set to the 1 position, FW#1 is set to the 3 position, the iris is opened, and the tracker is pointed to the sun. The UV spectrum is scanned in steps of 0.5nm, widths and integration of 4 shutter cycles for wavelengths less than 300nm, and an integration of 1 shutter cycle for wavelengths grater than 300nm. All data is normalised to a 1 cycle observation and recorded in a UFJJJYY.nnn data file. When scanning is complete, a calculation of the UVB/UVA McKinley - Diffey weighted irradiance is computed and sent to the printer and written to the DUVJJJYY.nnn data file.