Exploring the Unknown - NASA's History Office

[5] Table 2*
EXPLORING THE UNKNOWN 189
RESOLUTION OF CLOUDS BY SECOND- AND THIRD-QUARTER MOONLIGHT
(Image orthicon f/1.4 camera operated at 20:1; signal-to-noise ratio
at rates of 40, 10, and 4 exposure frames/sec; and a satellite height of 350 mi)
Minimum Resolvable Surface Dimension
Contrast Aperture 40 Frames/Sec 10 Frames/Sec 4 Frames/Sec
(%) (in.) (ft) (ft) (ft)
100 5 1.08 0.54 0.34
10 0.54 0.27 0.17
20 0.27 0.14 0.09
25 5 4.32 2.16 1.36
10 2.16 1.08 0.68
20 1.08 0.54 0.34
10 5 10.8 5.4 3.4
10 5.4 2.7 1.7
20 2.7 1.35 0.85
* The material contained in this table is included in RAND Report R-217 (see footnote 1. . .).
Table 3*
RESOLUTION OF CLOUDS BY LIGHT OF THE NIGHT SKY
(Image orthicon f/0.7 camera operated at 20:1; signal-to-noise ratio
at rates of 40, 10, and 4 exposure frames/sec; and a satellite height of 350 mi)
Minimum Resolvable Surface Dimension
Contrast Aperture 40 Frames/Sec 10 Frames/Sec 4 Frames/Sec
(%) (in.) (ft) (ft) (ft)
100 10 4.3 2.15 1.36
20 2.15 1.08 0.68
40 1.08 0.54 0.34
25 10 17.2 8.6 5.4
20 8.6 4.3 2.7
40 4.3 2.15 1.36
10 10 43.0 21.5 13.6
20 21.5 10.8 6.8
40 10.8 5.4 3.4
* The material contained in this table is included in RAND Report R-217 (see footnote 1. . .).