C-130 Aerosol LAS-AIR Optical Particle Counter

The LAS-AIR is a commercial instrument (PMS Model 1001) that measured the size distribution of particles between about 0.1 to > 3 microns diameter in 8 size channels. During DYCOMS, the LAS-AIR was one of a number of instruments sampling off the solid diffuser inlet (SDI) which was mounted on the right side of the C-130 aircraft. To dry the sample and prevent coincidence at high concentrations, the LAS-AIR sample stream was diluted with dry nitrogen in a 5:1 ratio (5 parts N2 to 1 part sample). All flow rates were monitored and maintained with constant volume flow controllers. The LAS-AIR samples over a 6 sec interval, so the data rate is once every 6 seconds. Rather than using the manufacturer's calibration, size limits were calibrated using monodisperse ammonium sulfate aerosol. Additional information on the LAS-AIR itself can be found on the PMS website at http://www.pmeasuring.com/particle/products/aerosol/docs/lasair

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Temporal Range

  • Begin:  2001-07-13T00:00:00Z
    End:  2001-07-28T23:59:59Z


Resource Type dataset
Temporal Range Begin 2001-07-13T00:00:00Z
Temporal Range End 2001-07-28T23:59:59Z
Temporal Resolution N/A
Bounding Box North Lat 37.00000
Bounding Box South Lat 26.00000
Bounding Box West Long -127.00000
Bounding Box East Long -115.00000
Spatial Representation grid
Spatial Resolution N/A
Related Links

Documentation #1 : SDILASArchiveReadme.txt

Additional Information N/A
Resource Format N/A
Standardized Resource Format UNDEFINED FORMAT
Asset Size 4 MB
Legal Constraints


Access Constraints none
Software Implementation Language N/A

Resource Support Name EOL Data Support
Resource Support Email datahelp@eol.ucar.edu
Resource Support Organization UCAR/NCAR - Earth Observing Laboratory
Distributor UCAR/NCAR - Earth Observing Laboratory
Metadata Contact Name EOL Data Support
Metadata Contact Email datahelp@eol.ucar.edu
Metadata Contact Organization UCAR/NCAR - Earth Observing Laboratory

Author Cynthia H. Twohy
Publisher UCAR/NCAR - Earth Observing Laboratory
Publication Date 2006-06-12T14:51:14
Digital Object Identifier (DOI) https://doi.org/10.26023/TCAM-P9Z3-4813
Alternate Identifier 68.069
Resource Version 1.0
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2023-03-23T22:27:02Z
Metadata Record Identifier edu.ucar.eol::68.069
Metadata Language eng; USA
Suggested Citation Cynthia H. Twohy. (2006). C-130 Aerosol LAS-AIR Optical Particle Counter. 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.26023/TCAM-P9Z3-4813. Accessed 27 September 2023.

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