Highway Research Record

Highway Research Record

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... of a specially constructed luminance meter, a DC amplifier, and a strip-chart recorder, all mounted in a 1965 Ford station wagon. ... of marks placed on the edge of the chart at approximately 5-min intervals by means of a manually operated event marker. ... Readings were recorded from 7:30 a.m. until about 12: 30 p.m. on an overcast summer day with the ambient light level ranging from 45 to 345 ft-c.

Title:Highway Research Record
Publisher: - 1969


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