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NSF/NCAR GV (HIAPER) QC Dropsonde Data


The CSET (Cloud System Evolution in the Trades) campaign was a large-scale, multi-agency research project in which measurements were collected using the NSF/NCAR GV HIAPER (Gulfstream-V High-performance Instrumented Airborne Platform for Environmental Research(N677F) Aircraft between California and Hawaii. The goal of the field campaign was to collect measurements of cloud, precipitation, and aerosols in order to gain a better understanding of the evolution of boundary layer aerosol, cloud, and thermodynamic structures along trajectories within the North-Pacific trade-wind region. One hundred twenty dropsonde soundings were collected between June 1 and Aug 12, 2015. These data are provided in the EOL format and have been quality controlled.

Data access

  • ORDER data for delivery by FTP

Additional information

Data Quality final
  • 1.0 (2016-04-15):

    Final, QC'd data.

  • 1.1 (2016-04-18):

    Fixed a header that flagged data as preliminary.

  • 2.0 (2016-05-13):

    Error in post-processing code reduced data from quarter second to half-second resolution in previous version. This has been fixed in version 2.0 

  • 3.0 (2016-07-27):

    This version represents final, QC'd data that includes the proper header, filenames, and a dry bias correction. This dataset is the most current as of 27 Jul 2016.

  • 4.0 (2016-08-01):

    This is version 4 of the CSET dropsonde data and includes a RH dry bias correction and dew point recalcuation.This version also removes an incorrect 'preliminary' flag in the header.

(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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Frequency < 1 second
Language English
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Temporal coverage

Begin datetime 2015-07-01 00:00:00
End datetime 2015-08-12 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 40.00, Minimum (South) Latitude: 19.00
Minimum (West) Longitude: -157.00, Maximum (East) Longitude: -121.00

Primary point of contact information

Kathryn Young

Additional contact information


Example citation following ESIP guidelines:

UCAR/NCAR - Earth Observing Laboratory. 2016. NSF/NCAR GV (HIAPER) QC Dropsonde Data. Version 4.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 06 Jun 2020.

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

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Ancillary information

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