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NCAR/EOL Driftsonde Data



Quality-controlled driftsonde sounding data for the African Monsoon Multidisciplinary Analysis (AMMA) project. A total of 124 soundings are contained in the quality final archive.

Data access

  • ORDER data for delivery by FTP

Additional information

Data Quality final
  • 2.0 (2016-02-16):

    The second version of AMMA quality-controlled driftsonde data is different from the first version that was released on January 26, 2007 in the following ways:

    (1) The 1st version of quality controlled (QC) data does not contain any calculated pressure values. Note that the Miniature In-situ Sounding Technology (MIST) dropsonde carried by the driftsonde did not have a pressure sensor. In the 2nd version of the QCed data, pressure was calculated and stored in the final dataset (see details in Section 6 of Readme).

    (2) During this second phase of the data QC, the soundings (with calculated pressure included) were run through the Atmospheric Sounding Processing ENvironment (ASPEN) software, which analyzes the data, performs smoothing, and removes suspect data points. Additional QC procedures are also applied to the 2nd version of the QCed data (see Section 6 of Readme).

    (3) The 2nd version of QCed data is in the EOL sounding format (see Section 4 of Readme), while the 1st version was in original D file format.

    The readme file for the 1st version of QCed data has been included with the release of the 2nd version of the data.

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Spatial Type unknown
Frequency 1 second
Language English
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Related links

Temporal coverage

Begin datetime 2006-08-29 00:00:00
End datetime 2011-03-10 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 30.00, Minimum (South) Latitude: 0.00
Minimum (West) Longitude: -30.00, Maximum (East) Longitude: 35.00

Primary point of contact information

EOL Data Support <>


UCAR/NCAR - Earth Observing Laboratory. 2016. NCAR/EOL Driftsonde Data. Version 2.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 26 May 2024.

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Ancillary information

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