An Assessment of the Carbon Humidity Element in Radiosonde Systems.
AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
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Recent studies have indicated that serious errors exist in the measurement of relative humidity as obtained by U.S. radiosondes. This disclosure has caused some concern in the meteorological community as to the overall accuracy and reliability of carbon humidity element measurements. The intent of this report is to enumerate in a general fashion the problems involved with humidity sensing from radiosondes and with the errors that are inherent in this immersion-type sensor. An assessment of the carbon humidity element is outlined for various parameters. Included are the results of selected field and laboratory sensor studies performed over the past several years by AFCRL. Author