Field of View Sizes as a Function of View Angles
The following two tables describe the physical sizes and locations of the field of views of the instruments as projected on the ground around the tower. The size of the plot was 100 meters by 100 meters and the row spacing beween plants was .43 meters in two perpendicular directions. Therefore, the maximum view zenith angle that should be considered valid is 68 degrees for the twelve degree FOV and 74 degrees for the one degree FOV. For a 0 degree view zenith angle, the FOV includes about 1/2 of a row width for the 1 degree FOV and 6-1/2 row widths for the 12 degree FOV.
One Degree Field of View
This field of view was used was used for the Barnes MMR instruments for all of the dates and for the Cimel instruments from July 11 through July 16.
View
Zenith Near Mid Far FOV FOV
Angle Point Point Point Length Width
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(degrees) (meters) (meters) (meters) (meters) (meters)
0 -0.12 0.00 0.12 0.24 0.24
2 0.35 0.47 0.59 0.24 0.24
4 0.83 0.94 1.06 0.24 0.24
6 1.30 1.42 1.54 0.24 0.24
8 1.78 1.90 2.02 0.24 0.24
10 2.26 2.38 2.50 0.24 0.24
12 2.75 2.87 2.99 0.25 0.24
14 3.24 3.37 3.49 0.25 0.24
16 3.74 3.87 4.00 0.26 0.25
18 4.26 4.39 4.52 0.26 0.25
20 4.78 4.91 5.05 0.27 0.25
22 5.32 5.45 5.59 0.27 0.25
24 5.87 6.01 6.15 0.28 0.26
26 6.44 6.58 6.73 0.29 0.26
28 7.03 7.18 7.33 0.30 0.27
30 7.64 7.79 7.95 0.31 0.27
32 8.27 8.44 8.60 0.33 0.28
34 8.94 9.11 9.28 0.34 0.28
36 9.63 9.81 9.99 0.36 0.29
38 10.36 10.55 10.74 0.38 0.30
40 11.13 11.33 11.53 0.40 0.31
42 11.94 12.16 12.37 0.43 0.32
44 12.81 13.04 13.27 0.46 0.33
46 13.74 13.98 14.23 0.49 0.34
48 14.73 14.99 15.26 0.53 0.35
50 15.81 16.09 16.38 0.57 0.37
52 16.97 17.28 17.59 0.62 0.38
54 18.24 18.58 18.93 0.68 0.40
56 19.64 20.01 20.40 0.75 0.42
58 21.19 21.60 22.03 0.84 0.44
60 22.92 23.38 23.86 0.94 0.47
62 24.86 25.39 25.93 1.07 0.50
64 27.08 27.68 28.30 1.23 0.54
66 29.62 30.32 31.05 1.42 0.58
68 32.59 33.41 34.27 1.68 0.63
70 36.11 37.09 38.12 2.02 0.69
72 40.35 41.55 42.82 2.47 0.76
74 45.58 47.08 48.68 3.10 0.85
76 52.20 54.15 56.23 4.03 0.97
78 60.89 63.51 66.35 5.46 1.13
80 72.84 76.56 80.67 7.83 1.36
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Twelve Degree Field of View
This field of view was used for the Cimel instruments from July 25 through August 5.
View
Zenith Near Mid Far FOV FOV
Angle Point Point Point Length Width
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(degrees) (meters) (meters) (meters) (meters) (meters)
0 -1.42 0.00 1.42 2.84 2.84
2 -0.94 0.47 1.90 2.84 2.84
4 -0.47 0.94 2.38 2.85 2.84
6 0.00 1.42 2.87 2.87 2.85
8 0.47 1.90 3.37 2.89 2.87
10 0.94 2.38 3.87 2.93 2.88
12 1.42 2.87 4.39 2.97 2.90
14 1.90 3.37 4.91 3.02 2.92
16 2.38 3.87 5.45 3.07 2.95
18 2.87 4.39 6.01 3.14 2.98
20 3.37 4.91 6.58 3.22 3.02
22 3.87 5.45 7.18 3.31 3.06
24 4.39 6.01 7.79 3.41 3.11
26 4.91 6.58 8.44 3.52 3.16
28 5.45 7.18 9.11 3.65 3.21
30 6.01 7.79 9.81 3.80 3.28
32 6.58 8.44 10.55 3.96 3.35
34 7.18 9.11 11.33 4.15 3.42
36 7.79 9.81 12.16 4.36 3.51
38 8.44 10.55 13.04 4.60 3.60
40 9.11 11.33 13.98 4.87 3.70
42 9.81 12.16 14.99 5.18 3.82
44 10.55 13.04 16.09 5.54 3.95
46 11.33 13.98 17.28 5.95 4.09
48 12.16 14.99 18.58 6.43 4.24
50 13.04 16.09 20.01 6.98 4.41
52 13.98 17.28 21.60 7.62 4.61
54 14.99 18.58 23.38 8.39 4.83
56 16.09 20.01 25.39 9.30 5.07
58 17.28 21.60 27.68 10.40 5.36
60 18.58 23.38 30.32 11.74 5.68
62 20.01 25.39 33.41 13.40 6.04
64 21.60 27.68 37.09 15.49 6.47
66 23.38 30.32 41.55 18.17 6.98
68 25.39 33.41 47.08 21.69 7.58
70 27.68 37.09 54.15 26.47 8.30
72 30.32 41.55 63.51 33.19 9.18
74 33.41 47.08 76.56 43.15 10.30
76 37.09 54.15 96.06 58.97 11.73
78 41.55 63.51 128.44 86.90 13.65
80 47.08 76.56 193.06 145.98 16.34
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