B-1
APPENDIX B
ESTIMATION OF AMBIENT ILLUMINATION LEVEL
Some of usual natural light conditions and corresponding repre-
sentative illumination values are presented in Table B-1.
TABLE B-1.
STANDARD NATURAL LIGHT CONDITIONS AND ILLUMINATION VALUES
STANDARD NATURAL LIGHT CONDITIONS
ILLUMINATION VALUE, LUX
Quarter moon
0.05
Full moon
0.30
Late twilight sky
1.00
Twilight sky
10.00
Overcast sky in the daytime
500.00
Summary of Contents for ATN PS28
Page 7: ...1 1 SECTION I INTRODUCTION ...
Page 16: ...1 10 FIGURE 1 3 PS28 OPTIONAL EQUIPMENT 5 4 1 2 3 6 ...
Page 17: ...2 1 SECTION II OPERATING INSTRUCTIONS ...
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Page 33: ...3 1 SECTION III MAINTENANCE INSTRUCTIONS ...
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