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UW CIMS (Chemical Ionization Mass Spectrometer) - HNO3 Data


This data set contains NSF/NCAR C-130 UW CIMS (Chemical Ionization Mass Spectrometer) - HN03 Data collected during the WE-CAN (Western Wildfire Experiment for Cloud Chemistry, Aerosol, Absorption and Nitrogen) field project from 24 July through 28 August 2018. This data set is in ICARTT format. Please see the header portion of the data files for details on instruments, parameters, quality assurance, quality control, contact information, and data set comments.

Data access

  • ORDER data for delivery by FTP

Additional information

Data Quality final
  • 0.1 (2018-11-19):

    RA: Preliminary field data.

  • 0.2 (2018-12-12):

    RB: Fixed a bug that caused estimated 0-40 percent discrepancies in concentrations of 9 of the 14 compounds reported in RA.

  • 0.3 (2018-12-20):

    R0: No substantial changes to data since RB with the exception of a time adjustment for RF01 (July 24, 2018). Variable names for all flights have been appended with "_UWCIMS".

  • 1.0 (2019-05-14):

    R1: several of the calibration factors and water vapor corrections have been updated.

(Only the current version of the data is available to order. If you have questions about a prior version, please email us.)
Metadata download

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Related projects
Spatial Type point
Frequency continuous
Language English
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 2018-07-24 00:00:00
End datetime 2018-08-28 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 49.00, Minimum (South) Latitude: 35.00
Minimum (West) Longitude: -125.00, Maximum (East) Longitude: -100.00

Primary point of contact information

EOL Data Support <>

Additional contact information


Example citation following ESIP guidelines:

Thornton, J. 2019. UW CIMS (Chemical Ionization Mass Spectrometer) - HNO3 Data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 17 Oct 2019.

Today's date is shown: please replace with the date of your most recent access.

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