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Water Vapor Sensing System (Winds, Temperatures, and Water Vapor Fields from Commercial Aircraft) [NCAR/EOL]


This data set contains the JOSS quality controlled WVSS-I data. This data has consistent water vapor information (dewpoint, RH, and mixing ratio are consistent), and has the benefit of time continuity to check for changes in WVSS-I calibration. IMPORTANT NOTE: The sensor technology of the first generation Water Vapor Sensing System (WVSS-I) is Vaisala's thin-film capacitor. Though a better sensor than found on radiosondes, it still loses calibration over time. The data from WVSS-I gathered from July 1, 1999 to December 31, 1999 has been evaluated and a scientific article is being prepared. This data is useful with data from four of the six aircraft considered quite good. One aircraft (#376) appears approximately 5% too wet and one aircraft (#441) appears approximately 5% too dry (very dry in November and December 1999). See the README for further information.

Data access

  • ORDER data for delivery by FTP

Additional information

Data Quality final
  • 1.0 (2008-10-07)
Metadata download

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Related projects
Spatial Type point
Frequency < 1 minute
Language English
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 1999-07-01 00:00:00
End datetime 2003-07-31 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 54.00, Minimum (South) Latitude: 24.00
Minimum (West) Longitude: -126.00, Maximum (East) Longitude: -66.00

Primary point of contact information

EOL Data Support <>

Additional contact information


Example citation following ESIP guidelines:

UCAR/NCAR - Earth Observing Laboratory. 2008. Water Vapor Sensing System (Winds, Temperatures, and Water Vapor Fields from Commercial Aircraft). Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 07 Dec 2019.

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