
261Fundamentals of Solar Radiation
© 2008 Taylor & Francis Group, LLC
350
340
330
320
310
300
290
280
260
250
240
230
220
210
200
190
South
)
170
160
150
140
SE
130
120
110
100
East
80
70
60
50
NE
40
30
20
10
0
0
10
10
20
20
30
30
40
40
–23°27
΄
–20°
–15°
–10°
–5°
0°
+5°
+10°
+15°
+20°
+23°27
΄
50
50
60
60
70
70
6 p.m.
7 p.m.
5 p.m.
4 p.m.
3 p.m.
2 p.m.
1 p.m.
11 a.m.
Noon
10 a.m.
9 a.m.
8 a.m.
7 a.m.
6 a.m.
5 a.m.
80
SW
st
NW
North
350
340
330
320
310
300
290
280
260
250
240
230
220
210
200
190
170
160
150
140
SE
130
120
110
100
East
80
70
60
50
NE
40
30
20
10
0
0
10
10
20
20
30
30
40
40
–23°27
΄
–20°
–15°
–10°
–5°
0°
+5°
+10°
+15°
+20°
–23°27
΄
50
50
60
60
70
70
80
80
SW
West
NW
S
o
l
a
r
T
i
m
e
6 p.m.
5 p.m.
4 p.m.
3 p.m.
2 p.m.
1 p.m.
11 a.m.
Noon
10 a.m.
9 a.m.
8 a.m.
7 a.m.
6 a.m.
7 p.m.
5 a.m.
S