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Instrument

DACOM
Differential Absorption Carbon monOxide Measurements

The in‐situ diode laser spectrometer system, referred to by its historical name DACOM, includes three tunable diode lasers providing 4.7, 4.5, and 3.3 μm radiation for accessing CO, N2O, and CH4 absorption lines, respectively. The three laser beams are combined by the use of dichroic filters and are then directed through a small volume (0.3 liter) Herriott cell enclosing a 36 meter optical path. As the three coincident laser beams exit the absorption cell, they are spectrally isolated using dichroic filters and are then directed to individual detectors, one for each laser wavelength. Wavelength reference cells containing CO, CH4, and N2O are used to wavelength lock the operation of the three lasers to the appropriate absorption lines.

Instrument Details

Spectrometer/Radiometer
ATMOSPHERIC CHEMISTRY, ATMOSPHERE, CARBON AND HYDROCARBON COMPOUNDS, CARBON DIOXIDE, ATMOSPHERIC CHEMISTRY, ATMOSPHERE, ATMOSPHERIC CHEMISTRY, ATMOSPHERE, CARBON AND HYDROCARBON COMPOUNDS, METHANE, ATMOSPHERIC CHEMISTRY, ATMOSPHERE, CARBON AND HYDROCARBON COMPOUNDS, CARBON MONOXIDE, ATMOSPHERIC CHEMISTRY, ATMOSPHERE, NITROGEN COMPOUNDS, NITROUS OXIDE
Troposphere
1 s
36 m
64 THz, 67 THz, 91THz
External Linkhttps://doi.org/10.1029/JD092iD02p02071
CV-990

Convair CV-990

1 Campaign · 7 Instruments
CITE

Global Tropospheric Experiment - Chemical Instrument Test and Evaluation

1983—1989
Wallops Island, Hawaii, Central Pacific, California, Eastern Pacific Ocean, North Atlantic
view all deployment dates
5 Deployments
· 0 Data Products
CITE

Global Tropospheric Experiment - Chemical Instrument Test and Evaluation

1983—1989
Wallops Island, Hawaii, Central Pacific, California, Eastern Pacific Ocean, North Atlantic
view all deployment dates
5 Deployments
· 0 Data Products
TC4

Tropical Composition, Cloud and Climate Coupling

2007
Costa Rica, tropical Eastern Pacific
view all deployment dates
1 Deployment
· 0 Data Products
Stationary
Campaign FS

Campaign Field Sites

32 Campaigns · 103 Instruments
CITE

Global Tropospheric Experiment - Chemical Instrument Test and Evaluation

1983—1989
Wallops Island, Hawaii, Central Pacific, California, Eastern Pacific Ocean, North Atlantic
view all deployment dates
5 Deployments
· 0 Data Products
TC4

Tropical Composition, Cloud and Climate Coupling

2007
Costa Rica, tropical Eastern Pacific
view all deployment dates
1 Deployment
· 0 Data Products

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