C-130 Aerosol LAS-AIR Optical Particle Counter
https://data.eol.ucar.edu/dataset/68.069

Summary
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

Identifiers
 * Local archive identifier: 68.069
 * doi:10.26023/TCAM-P9Z3-4813
   https://doi.org/10.26023/TCAM-P9Z3-4813

Versions
  1.0

Citation
 Twohy, C. 2006. DYCOMS-II: C-130 Aerosol LAS-AIR Optical Particle Counter.
 Version 1.0. UCAR/NCAR - Earth Observing Laboratory.
 https://doi.org/10.26023/TCAM-P9Z3-4813 Accessed 20 Apr 2024.

Additional citation styles can be generated by entering the DOI
at CrossCite (https://citation.crosscite.org/).

Acknowledgement
In addition to the citation reference and any other acknowledgements,
please acknowledge NCAR/EOL in your publications with text such as:

  Data provided by NCAR/EOL under the sponsorship of
  the National Science Foundation.
  https://data.eol.ucar.edu/

Related projects
 * DYCOMS-II: Dynamics and Chemistry of Marine Stratocumulus Phase II
   https://data.eol.ucar.edu/project/DYCOMS-II

Additional information
 * Spatial Type: point
 * Frequency: < 1 minute
 * Language: English

Categories
 * Aircraft

Platforms
 * NSF/NCAR C-130

Instruments
 * Optical Particle Counter - OPC

GCMD Science Keywords
 * EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > PARTICLE SIZE DISTRIBUTION
 * EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL PARTICLE PROPERTIES

Documentation
 * SDILASArchiveReadme.txt [3 KiB]
   https://data.eol.ucar.edu/file/download/410F77DB/SDILASArchiveReadme.txt

Related links
 * homepage: DYCOMS-II Project Homepage
   https://www.eol.ucar.edu/field_projects/dycoms-ii
 * info: DYCOMS-II Missions
   https://catalog.eol.ucar.edu/dycoms/catalog/missions/

Temporal coverage
 * Begin datetime: 2001-07-13 00:00:00 
 * End datetime: 2001-07-28 23:59:59 

Spatial coverage
 * Maximum (North) Latitude: 37.00
 * Minimum (South) Latitude: 26.00
 * Minimum (West) Longitude: -127.00
 * Maximum (East) Longitude: -115.00

Primary contact information
 * pointOfContact: Cynthia H. Twohy <twohy@nwra.com>
   https://data.eol.ucar.edu/contact/show/370

Additional contact information
 * principalInvestigator: Cynthia H. Twohy <twohy@nwra.com>
   https://data.eol.ucar.edu/contact/show/370
 * author: Cynthia H. Twohy <twohy@nwra.com>
   https://data.eol.ucar.edu/contact/show/370

Alternate metadata formats
 * DataCite: https://data.eol.ucar.edu/dataset/68.069?format=datacite
 * ISO/TC 211: https://data.eol.ucar.edu/dataset/68.069?format=isotc211