
BF5 User Manual v 2.3
Appendix A: Design and Test Summary
47
Sunshine state
This graph shows daily sunshine totals measured by a BF3, compared to the WMO definition
of 120 W.m-2 in the Direct beam. Data recorded at Napier University, Edinburgh between
February and July 2001. Comparable data from an adjacent Campbell-Stokes recorder is also
plotted.
Daily sunshine totals
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
WMO Sunshine Hrs
S
u
n
sh
in
e
H
rs
BF3
Campbell-Stokes