0 0 DIRECT SUN, ATTENUATOR #0
1 1 DIRECT SUN, ATTENUATOR #1
2 2 DIRECT SUN, ATTENUATOR #2
3 3 FOCUSSED MOON
4 4 FOCUSSED SUN
5 5 FOCUSSED SUN CORRECTED WITH ADJACENT SKY MEASUREMENTS
6 6 ZENITH SKY
15 15 MISSING VALUE
