Accession Number : AD0608503

Title :   ALPHA RADIATION HYGROMETER. VOLUME III: CURRENT PROBLEMS IN STRATOSPHERIC WATERVAPOR MEASUREMENTS MADE WITH AUTOMATIC FROST-POINT HYGROMETERS.

Descriptive Note : Final rept. for 1 Jan 63-15 Jul 64,

Corporate Author : HONEYWELL INC PHILADELPHIA PA

Personal Author(s) : Ballinger,J. G. ; Fricke,M. P. ; Murphy,R. D.

Report Date : 15 AUG 1964

Pagination or Media Count : 33

Abstract : Two basic problems inherent in the stratospheric application f all automatic frost-point hygrometers are examined. In particular, instrument inadequacy due to low rates of mass transfer is found to be a highly probable explanation of the current controversy about upperatmosphere water-vapor content. The second problem is that of contamination of the moist-air sample by water vapor desorbed from the instrument package and vehicle. The magnitude of this effect precludes a simple accommodation of low mass transfer rates by use of long sampling times. Measures to increase the reliability of future stratospheric data are recommended. (Author)

Descriptors :   (*HYGROMETERS, DEW POINT), (*WATER VAPOR, STRATOSPHERE), (*ALPHA PARTICLE DETECTORS, HYGROMETERS), METEOROLOGICAL INSTRUMENTS, HUMIDITY, ATMOSPHERES, MEASUREMENT, RELIABILITY, SAMPLERS, CONTAMINATION, FLIGHT TESTING, ATMOSPHERIC SOUNDING

Distribution Statement : APPROVED FOR PUBLIC RELEASE