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ORCAS Merge Products


This dataset contains merge products for the measurements collected by the NSF/NCAR GV HIAPER (Gulfstream-V High-performance Instrumented Airborne Platform for Environmental Research) aircraft (Tail Number N677F) during the ORCAS (O2/N2 Ratio and CO2 Airborne Southern Ocean) campaign. The files contain data for all flights for a variety of measurement subsets and averaging intervals. The types of data collected in the project include 1) high-rate (~ 1 Hz) in situ measurements from many instruments, 2) in situ gas-chromatography (GC) measurements on samples collected over a short (~ 30 sec) period of time but spaced by several minutes from the TOGA instrument, 3) laboratory measurements on whole air samples collected in pressurized metal canisters over short (~ 10-20 sec) periods of time by the AWAS sampler, and 4) laboratory measurements on whole air samples collected in continuously flowing glass flasks with longer (~ 30 sec) volume mixing times by the Medusa sampler. The wide range of representative sample times and the unique nature of each measurement system necessitate several different merged data products.  

Data access

  • ORDER data for delivery by FTP
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Additional information

Data Quality final
  • 0.1 (2016-09-22):

    quick-look merges

  • 0.2 (2016-09-22):

    qaqc merges

  • 1.0 (2017-03-21):

    Final Release Data

(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 criteria
Language English
Related links

Temporal coverage

Begin datetime 2016-01-05 00:00:00
End datetime 2016-03-01 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: -30.00, Minimum (South) Latitude: -80.00
Minimum (West) Longitude: -105.00, Maximum (East) Longitude: -30.00

Primary point of contact information

EOL Data Support <>

Additional contact information


Example citation following ESIP guidelines:

Stephens, B. 2017. ORCAS Merge Products. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 18 Nov 2019.

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

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