Concept information
PREFERRED TERM
LYMAN-ALPHA HYGROMETER
DEFINITION
- LYMAN-ALPHA HYGROMETER is a hygrometer based on the absorption of radiation by water vapor at the Lyman-alpha line, which is an emission line of atomic hydrogen at 121.567 nm; this radiation can be generated by a glow discharge in hydrogen and detection is accomplished by a nitric oxide ion chamber; Lyman-alpha hygrometers are typically used on aircraft and meteorological towers for high frequency humidity measurements.
BROADER CONCEPT
URI
https://gcmd.earthdata.nasa.gov/kms/concept/667219fb-9061-40cf-933e-fd5d81272581
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