the variable-path Lyman-alpha hygrometer and its operating characteristics

View More View Less
  • 1 National Center for Atmospheric Research , Boulder, Colo. 80303
© Get Permissions Rent on DeepDyve
Restricted access

A hygrometer capable of making in situ humidity measurements with good accuracy and excellent time-space resolution is described. Based on the absorption of Lyman-alpha radiation by water vapor, the instrument uses a variable-path technique for achieving long-term stability and is characterized by 12 ms response time, 5% accuracy, 1 cm typical sensing path, and an operating range of −35° to +30°C dew point. The hygrometer is now operational on NCAR aircraft.

1 The National Center for Atmospheric Research is sponsored by the National Science Foundation.

A hygrometer capable of making in situ humidity measurements with good accuracy and excellent time-space resolution is described. Based on the absorption of Lyman-alpha radiation by water vapor, the instrument uses a variable-path technique for achieving long-term stability and is characterized by 12 ms response time, 5% accuracy, 1 cm typical sensing path, and an operating range of −35° to +30°C dew point. The hygrometer is now operational on NCAR aircraft.

1 The National Center for Atmospheric Research is sponsored by the National Science Foundation.

Save