	READ ME -- Example 2-Arizona_UV_spectroradiometer

This example illustrates how to simulate a fictitious experiment of material 
degradation caused by UV, as monitored at a site close to Flagstaff, Arizona 
(lat. 35.1N, alt. 2.1 km amsl), in a dry, desert-like environment.

The studied samples are installed on a tracking surface, facing a sandy 
foreground.

The virtual experiment is monitored with a tracking spectroradiometer measuring 
global radiation, and a similar instrument measuring direct beam radiation within 
a 3 deg. half acceptance angle. Both instruments' FWHM is 1.2 nm, their spectral 
response with wavelength is close to Gaussian, their useful spectral range is 
290-400 nm, and they output results at every nm from 290 nm.

The conditions for this summertime experiment are known: Tair = 20 deg. C 
(during experiments), T = 15 deg. C (daily average), and RH = 30%.
The ozone column at sea level is estimated at 0.3 atm-cm (300 Dobson units) from 
climatological data.

The atmosphere is relatively dust-free and free of pollution. The type of aerosol 
is not known, but is probably close to a rural model.

It is asked to compare the measured and predicted spectra at air masses 1.2 and 
1.5, and also to extrapolate them to a zenith sun (air mass 1.0).

The measured UV doses from a Robertson-Berger sensor and other UV radiometers 
are also to be compared to their predicted counterparts.