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Instrument

DLH
Diode Laser Hygrometer

The NASA Langley/Ames Diode Laser Hygrometer (DLH) is an open path airborne tunable diode laser-based instrument which operates in the near-infrared spectral region at a wavelength of approximately 1.4 μm. The DLH measures the water vapor (H2O(v)) mixing ratio in the atmosphere by wavelength modulated differential absorption spectroscopy of an isolated rovibrational line.

Instrument Details

Temperature/Humidity
ATMOSPHERIC WATER VAPOR, ATMOSPHERE, WATER VAPOR PROFILES, ATMOSPHERIC WATER VAPOR, ATMOSPHERE, WATER VAPOR PROFILES, WATER VAPOR MIXING RATIO PROFILES, ATMOSPHERIC WATER VAPOR, ATMOSPHERE
Lower Stratosphere, Troposphere
50 ms
28.5 m
4 kHz
External Linkhttps://doi.org/10.1029/2002JD003156
CARAFE

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2016—2017
Eastern United States Coast, Mid-Atlantic Region
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2 Deployments
· 0 Data Products
ACCLIP

Asian Summer Monsoon Chemical & Climate Impact Project

2022
West Pacific, South Korea
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1 Deployment
· 0 Data Products
TC4

Tropical Composition, Cloud and Climate Coupling

2007
Costa Rica, tropical Eastern Pacific
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1 Deployment
· 0 Data Products
MACPEX

Mid-latitude Airborne Cirrus Properties Experiment

2011
Central United States, based out of Ellington, Texas
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1 Deployment
· 0 Data Products
TC4

Tropical Composition, Cloud and Climate Coupling

2007
Costa Rica, tropical Eastern Pacific
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1 Deployment
· 0 Data Products
TEFLUN

TExas and FLorida UNderflights

1998
Texas, Florida
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2 Deployments
· 0 Data Products
TEFLUN

TExas and FLorida UNderflights

1998
Texas, Florida
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2 Deployments
· 0 Data Products
Ongoing
ACTIVATE

Aerosol Cloud meTerology Interactions oVer the western ATlantic Experiment

2020 — Ongoing
Western North Atlantic Ocean
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4 Deployments
· 0 Data Products

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