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Instrument

JLH
JPL Laser Hygrometer

The JPL Laser Hygrometer (JLH) is an in situ airborne hygrometer developed at the Jet Propulsion Laboratory (JPL). It uses a tunable diode laser that operates at 1.37 μm to measure atmospheric water vapor in the upper troposphere and lower stratosphere. JLH has a minimum spatial resolution of 25 m and a detection range of 1 to 500 ppmv. It has a typical sampling rate of 1 Hz and can provide measurements at a precision of 0.05 ppmv.

Image of the JLH hygrometer
NASA's DC-8 flying laboratory passes Antarctica's tallest peak, Mount Vinson, on Oct. 22, 2012, during a flight over the continent to measure changes in the massive ice sheet and sea ice. Credit: NASA/Michael Studinger (Photography courtesy NASA Images)

Overview

Instrument Details

Temperature/Humidity
Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Water Vapor
Earth Science > Atmosphere > Atmospheric Water Vapor
Lower Stratosphere, Troposphere
1-8 Hz
25 m
219 THz
External Linkhttps://doi.org/10.1029/98JD01678

  • Robert Herman

  • Robert Herman

  • JPL

  • NASA

  • External LinkOverview Publication

    • Unpublished

Instrument Operation

TC4

Tropical Composition, Cloud and Climate Coupling

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

Mid-latitude Airborne Cirrus Properties Experiment

2011
Central United States, based out of Ellington, Texas
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1 Deployment
· 7 Data Products
CRYSTAL-FACE logo converted to .png
CRYSTAL-FACE

Cirrus Regional Study of Tropical Anvils and Cirrus Layers Florida Area Cirrus Experiment

2002
Southern Florida
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1 Deployment
· 1 Data Product
AVE

Aura Validation Experiment

2004—2005
Houston, Texas, Southern United States, Gulf of Mexico
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2 Deployments
· 0 Data Products
ACCENT

Atmospheric Chemistry of Combustion Emissions Near the Tropopause

1999—2000
Southern United States
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3 Deployments
· 0 Data Products
MidCiX

Middle Latitude Cirrus Experiment

2004
South-central United States
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1 Deployment
· 0 Data Products
POLARIS

Photochemistry of Ozone Loss in the Arctic Region In Summer

1997
Arctic, Mid-latitudes
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3 Deployments
· 0 Data Products
CRYSTAL-FACE logo converted to .png
CRYSTAL-FACE

Cirrus Regional Study of Tropical Anvils and Cirrus Layers Florida Area Cirrus Experiment

2002
Southern Florida
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1 Deployment
· 1 Data Product
SEAC4RS

Studies of Emissions and Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys

2013
North America including portions of Canada, Mexico and the Gulf of Mexico
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1 Deployment
· 20 Data Products
SOLVE

SAGE III Ozone Loss and Validation Experiment

1999—2003
Arctic, Kiruna, Sweden
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2 Deployments
· 32 Data Products
CAMEX

Convection and Moisture Experiment

1993—2001
US Atlantic coast, Gulf of Mexico, Caribbean
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4 Deployments
· 70 Data Products
SOLVE

SAGE III Ozone Loss and Validation Experiment

1999—2003
Arctic, Kiruna, Sweden
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2 Deployments
· 32 Data Products

Data Products

Filter data products from this instrument by specific campaigns, platforms, or formats.

Campaigns
CAMPAIGNS
Platforms
PLATFORMS
Formats
FORMATS
Douglas DC-8
NASA WB-57
External Link10.5067/ASDC/SUBORBITAL/SEAC4RS_MetNav_AircraftInSitu_ER2_Data_1
Douglas DC-8
External Link10.5067/ASDC/SUBORBITAL/SOLVE1_MetNav_AircraftInSitu_DC8_Data_1
Douglas DC-8
Other Ames
External Link10.5067/ASDC/SUBORBITAL/SOLVE1_MetNav_AircraftInSitu_ER2_Data_1
Other Ames