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
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE