The Diode Laser Hygrometer (DLH) is an in situ airborne hygrometer developed by NASA’s Langley Research Center (LaRC). It uses tunable diode laser absorption to measure water vapor in the atmosphere. DLH operates in the near-infrared region at around 1.4 μm and has a measurement frequency of 100 Hz. It can provide accurate measurements of water vapor even while flying through clouds.
Instrument Details
- Temperature/Humidity
- Earth Science > Atmosphere > Atmospheric Water VaporEarth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Water VaporEarth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity > Relative HumidityEarth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity
- Lower Stratosphere, Troposphere
- 100 Hz
- Point
- 214 THz
- https://doi.org/10.1029/2002JD003156
Glenn S. Diskin
Glenn S. Diskin
LaRC
Currently unavailable
 Douglas DC-8 38 Campaigns · 174 Instruments |  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 1 Deployment · 20 Data Products
 Deep Convective Clouds & Chemistry 2012 Northeastern Colorado, West Texas to Central Oklahoma, Northern Alabama 1 Deployment · 19 Data Products
 NASA African Monsoon Multidisciplinary Analyses 2006 Cape Verde Islands, Atlantic Ocean 1 Deployment · 23 Data Products
 Arctic Research of the Composition of the Troposphere from Aircraft and Satellites 2008 Alaska, Western Canada, California 3 Deployments · 27 Data Products
 Student Airborne Research Program 2009—2030 Southern California, Virginia Ongoing 17 Deployments · 0 Data Products
 TExas and FLorida UNderflights 1998 Texas, Florida 2 Deployments · 0 Data Products
 Tropical Composition, Cloud and Climate Coupling 2007 Costa Rica, tropical Eastern Pacific 1 Deployment · 1 Data Product
 Korean United States - Air Quality 2016 South Korean peninsula, including surrounding seas 1 Deployment · 12 Data Products
 Atmospheric Tomography Mission 2016—2018 Western Arctic, South Pacific, Atlantic Ocean, Greenland, Central North America 4 Deployments · 41 Data Products
TRACE Transport and Atmospheric Chemistry near the Equator 1992—2001 Brazil, Southern Africa, Tropical Atlantic, Central & Western Regions of the Pacific Ocean Basin 2 Deployments · 0 Data Products
 Fire Influence on Regional to Global Environments and Air Quality 2019 Northwestern and Southeastern US 1 Deployment · 26 Data Products
 Active Sensing of CO2 Emissions over Nights, Days, and Seasons 2010—2017 United States, Canada 6 Deployments · 5 Data Products
 Intercontinental Chemical Transport Experiment - North America 2004—2006 North America, Gulf of Mexico, North Pacific Ocean, North Atlantic Ocean 2 Deployments · 21 Data Products
 Atmospheric Emissions and Reactions Observed from Megacities to Marine Areas 2023 Urban regions across the western and eastern United States 1 Deployment · 0 Data Products
 Polar Aura Validation Experiment 2005 Northeastern United States, Eastern Canada 1 Deployment · 0 Data Products
 Airborne and Satellite Investigation of Asian Air Quality 2024 East and Southeast Asia, Philippines, South Korea, Thailand Ongoing 1 Deployment · 0 Data Products
 Subsonic Assessment (SASS) Ozone and Nitrogen Oxide Experiment 1997 North Atlantic Ocean, Ireland, Newfoundland, Bangor, Maine, Azores 1 Deployment · 10 Data Products
 Operation IceBridge 2009—2021 Greenland, Antarctica, Alaska, Arctic Sea 37 Deployments · 79 Data Products
SOLVE SAGE III Ozone Loss and Validation Experiment 1999—2003 Arctic, Kiruna, Sweden 2 Deployments · 32 Data Products
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 Global Hawk 5 Campaigns · 28 Instruments |  Airborne Tropical Tropopause Experiment 2011—2015 California, Guam, Tropics 4 Deployments · 5 Data Products
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 Cessna Citation II 8 Campaigns · 26 Instruments |  Mid-latitude Continental Convective Clouds Experiment 2011 Central Oklahoma, Southern Plains 1 Deployment · 34 Data Products
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 Short Brothers C-23 Sherpa 4 Campaigns · 19 Instruments | CARAFE NASA Carbon Atmospheric Flux Experiment 2016—2017 Eastern United States Coast, Mid-Atlantic Region 2 Deployments · 1 Data Product
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 P-3 Orion 19 Campaigns · 124 Instruments |  Deriving Information on Surface Conditions from COlumn and VERtically Resolved Observations Relevant to Air Quality 2011—2014 Baltimore MD, San Joaquin Valley CA, Houston TX, Denver CO 4 Deployments · 89 Data Products
Student Airborne Research Program 2009—2030 Southern California, Virginia Ongoing 17 Deployments · 0 Data Products
 Clouds, Aerosol, and Monsoon Processes-Philippines Experiment 2019 Philippines 1 Deployment · 12 Data Products
 Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms 2020—2023 Eastern United States 3 Deployments · 66 Data Products
 Arctic Radiation-Cloud-Aerosol-Surface Interaction EXperiment 2024 Greenland, Arctic Ocean 2 Deployments · 0 Data Products
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 NASA WB-57 15 Campaigns · 75 Instruments |  Mid-latitude Airborne Cirrus Properties Experiment 2011 Central United States 1 Deployment · 7 Data Products
 Pacific Oxidants, Sulfur, Ice, Dehydration, and cONvection 2016 Guam, western Pacific 1 Deployment · 0 Data Products
 Asian Summer Monsoon Chemical & Climate Impact Project 2022 West Pacific, South Korea 1 Deployment · 8 Data Products
 Newly-Operating and Validated Instruments Comparison Experiment 2008 Houston, Texas 1 Deployment · 0 Data Products
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 Beechcraft B-200 King Air 30 Campaigns · 73 Instruments |  Development and Evaluation of satellite ValidatiOn Tools by Experimenters 2011 Eastern and Southeastern United States 1 Deployment · 5 Data Products
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 Dassault Falcon 20-E5 6 Campaigns · 43 Instruments |  Aerosol Cloud meTerology Interactions oVer the western ATlantic Experiment 2020—2022 Western North Atlantic Ocean 6 Deployments · 12 Data Products
|
Filter data products from this instrument by specific campaigns, platforms, or formats.