The Difference Frequency Generation Absorption Spectrometer (DFGAS) is an in situ airborne spectrometer developed by the National Center for Atmospheric Research (NCAR). It uses difference-frequency generation (DFG) at 3.5 μm by combining two infrared laser sources operating at 1562 and 1083 nm to measure formaldehyde in the atmosphere. DFGAS acquires measurements in 1-second increments for a period of about 60 to 120 seconds, depending on the measurement needs. DFGAS has since been replaced by the Compact Atmospheric Multispecies Spectrometer (CAMS).
Instrument Details
- Spectrometer/Radiometer
- Earth Science > Atmosphere > Atmospheric Chemistry > Carbon And Hydrocarbon Compounds > FormaldehydeEarth Science > Atmosphere > Atmospheric Chemistry > Trace Gases/trace SpeciesEarth Science > Atmosphere > Atmospheric Chemistry
- Troposphere
- 1 s
- Point
- 192 THz, 277 THz
- https://doi.org/10.1007/s00340-006-2300-4
Dirk Richter, Alan Fried, Petter Weibring
Alan Fried
NCAR
NASA, NOAA, NSF
Unpublished
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 Arctic Research of the Composition of the Troposphere from Aircraft and Satellites 2008 Alaska, Western Canada, California 3 Deployments · 27 Data Products
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 P-3 Orion 22 Campaigns · 135 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
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