Accession Number : AD0682891
Title : TRANSMISSOMETER CALIBRATION TECHNIQUES.
Descriptive Note : Final rept.,
Corporate Author : WEATHER BUREAU STERLING VA TEST AND EVALUATION LAB
Personal Author(s) : Hochreiter,Frederick C. ; McCann,Robert J.
Report Date : SEP 1968
Pagination or Media Count : 142
Abstract : The report is devoted to the investigation, analysis, and specification of transmissometer procedures and techniques which may be accomplished without the need of specialized calibration devices. Two side-by-side, 250-ft. baseline transmissometers are used to isolate calibration techniques that may be useful under all visibility conditions. Past calibration procedures were limited to application in visibility of 5 miles or more. The report shows that these calibration procedures can be successfully applied when the visibility is as low as 2 miles. Preventive maintenance procedures which may be used to minimize transmissometer outages are discussed. Other results show that it is not possible to calibrate a transmissometer by using data from a nearby system(s) on an airfield. (Author)
Descriptors : (*OPTICAL INSTRUMENTS, CALIBRATION), (*VISIBILITY, OPTICAL INSTRUMENTS), LANDING FIELDS, MAINTENANCE, NIGHT LANDINGS, LIGHTING EQUIPMENT
Subject Categories : Terminal Flight Facilities
Distribution Statement : APPROVED FOR PUBLIC RELEASE