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NASA DC-8 1 Second Data Merge



This data set contains NASA DC-8 1 Second Data Merge data collected during the Deep Convective Clouds and Chemistry Experiment (DC3) from 18 May 2012 through 22 June 2012. These merges are an updated version that were provided by NASA. In most cases, variable names have been kept identical to those submitted in the raw data files. However, in some cases, names have been changed (e.g., to eliminate duplication). Units have been standardized throughout the merge. No "grand merge" has been provided for the 1-second data on the DC8 aircraft due to its prohibitive size (~1.5GB). In most cases, downloading the individual merge files for each day and simply concatenating them should suffice.

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.

For more information on the updates to this dataset, please see the readme file. 

Data access

  • ORDER data for delivery by FTP

Additional information

Data Quality final
  • 2.0 (2014-01-31):
    • Merge files now incorporate data added/modified by PIs as of June 09, 2014 (includes updated DLH, PALMS, and PINEPH-SCAT datasets).
    • Updated the processing for OMI O3 column data (now interpolates missing data within a larger domain, replaces missing data with -9999s instead of 0s).
  • 3.0 (2015-07-10):
    • Merge files now incorporate data added/modified by PIs as of May 19, 2015 (includes updated CIT-HCN, DACOM, DLH, and NOAA-AeroExt files).  
    • Per Jose Jimenez, fixed rename of OM_OC_lt_1um_AMS (changed from "OMtoO-Cratio-ratio-lt-1um_AMS" to "OAtoOC_ratio-lt-1um_AMS" in the merge)  
  • 4.0 (2016-05-19)
  • 5.0 (2017-05-15)
  • 6.0 (2018-06-27):

    This version of the dataset now includes an updated version of the HOx and OHReactivity dataset that was modified by the dataset PIs as of 9 May 2018.

(Only the current version of the data is available to order. If you have questions about a prior version, please email us.)
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Related projects
Spatial Type point
Language English
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 2012-05-18 00:00:00
End datetime 2012-06-22 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 42.06574, Minimum (South) Latitude: 24.96023
Minimum (West) Longitude: -106.76535, Maximum (East) Longitude: -84.94339

Primary point of contact information

EOL Data Support <>

Additional contact information


Example citation following ESIP guidelines:

Chen, G., Langley Research Center (LaRC), NASA, Olson, J. 2018. NASA DC-8 1 Second Data Merge. Version 6.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 27 Sep 2023.

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Ancillary information

Metadata download

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