NASA NTRS · 19650000250
Distant objects detected visually with optical filters
Abstract
Fluorescent coating aids visual daylight detection and identification of distant objects. An object appears as a blinking light when the area is alternately scanned with transmitting and obscuring filters. This method can be effective in search and rescue operations.
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1965-08-01. Distant objects detected visually with optical filters. https://ntrs.nasa.gov/citations/19650000250
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