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

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)

Document Details

Document Type
Technical Report
Publication Date
Aug 15, 1964
Accession Number
AD0608503

Entities

People

  • J. G. Ballinger
  • M. P. Fricke
  • R. D. Murphy

Organizations

  • Honeywell International, Inc.

Tags

DTIC Thesaurus Topics

  • Automatic
  • Contamination
  • Hygrometers
  • Mass Transfer
  • Measurement
  • Radiation
  • Reliability
  • Sampling
  • Vapors
  • Water Vapor

Fields of Study

  • Environmental science

Readers

  • Aerospace Test and Evaluation
  • Agricultural Chemistry/Soil Science
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster