United States Department of Transportation
i
FogEye UV Sensor System Evaluation : Phase I Report.
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2002-09-01
[PDF-1.88 MB]
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Abstract:FogEye technology uses the solar-blind reigion of the ultraviolet spectrum to develop sensors or systems that are unaffected by sunlight. The U.S. Congress asked the Federal Aviation Administration to investigate the feasibility of applying FogEye technology to aviation related problems. This report presents results of the FogEye UV Sensor/System Evaluation for Phase I, which compared the measurements of a FogEye transmissometer to those of visible light transmissometers. Several FogEye transmissometer configurations were tested at the Volpe National Transportation Systems Center's Otis Weather Test Facility in Bourne, Massachusetts. Test results were favorable-indicating that FogEye equipment can be solar blind, though care must be taken to avoid all responses to other regions of the spectrum. The effective ultraviolet extinction coefficient measured in fog by the FogEye transmissometer is about half the visisble-light extinction coefficient measured by a standard transmissometer. This result was expected, based on the theoretical undertsanding of light scattering from fog, and is a consequence of the wide fields of view of the FogEye transmitter and receiver. Conclusions thus far are that UV technology has merit and FogEye assessments should continue as planned to determine effective aviation applications.
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Content Notes:Introduction, Test configuration, Expectations, Test chronology, Data collection and analysis, Conclusions, Future testing, Appendices
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