Accession Number : ADA114977

Title :   Performance of Temperature/Dew Point Instruments.

Descriptive Note : Final methodology investigation,


Personal Author(s) : Biltoft,Christopher

PDF Url : ADA114977

Report Date : Apr 1982

Pagination or Media Count : 48

Abstract : A series of field trials was conducted to assess the performance of temperature/dew point systems used at the US Army Dugway Proving ground, UT. Data quality was degraded by noise, calibration drift, and exposure to adverse ambient conditions. Improved noise reduction procedures, particularly improved computer program noise filters, are needed. Calibration drift can be detected by comparison with a standard in the field or by deployment of instruments in pairs at one level. Exposure to adverse ambient conditions can be avoided by proper test planning and execution. Operated under favorable ambient conditions, dew cell hygrometers provide useful average dew points where great accuracy is not required. Optical condensation hygrometers responded faster and more accurately than the dew cell hygrometers. However, the temperature sensing system in the optical condensation hygrometers was inaccurate and unreliable. The thermistor temperature sensing system performed well during this test, but the data were severely damped. (Author)

Descriptors :   *Meteorological instruments, *Dew point, *Temperature, *Measurement, *Performance(Engineering), Test and evaluation, Detection, Accuracy, Temperature inversion, Optical properties, Hygrometers, Lithium chloride, Condensation, Noise, Calibration, Drift, Adverse conditions, Thermoelectric cooling, Thermistors, Thermometers, Coefficients

Subject Categories : Meteorology
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE