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Earth Observing Laboratory
Field Data Archive

CEPEX: NASA ER-2 Lyman Alpha Hygrometer Data

Summary

This dataset contains water vapor measurements from the Harvard University Lyman Alpha instrument aboard the ER-2 for 9 missions during CEPEX. The instrument used the techniques of photofragment fluorescence combined with dual path absorption to measure water vapor concentrations ranging from 1013 to 1016 molecules/cubic centimeters at pressures from 50 to 500 mb. The detection scheme utilized the Lyman-Alpha photons (121.6 nanometers) to photo- dissociate water vapor and produce excited OH molecules which emit photons that are detected by a photomultiplier near 314 nanometers. Units are in ppmv. Principal Investigators were Weinstock, Dessler, Hintsa, and Anderson (Harvard University).

Data access

Additional information

Identifier
Data Quality final
Versions
  • 1.0 (2006-07-26)
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Related projects
Spatial Type point
Frequency 1 second
Language English
Categories
Platforms
Instruments
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Temporal coverage

Begin datetime 1993-03-17 00:00:00
End datetime 1993-04-05 23:59:59

Spatial coverage


Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 20.00, Minimum (South) Latitude: -20.00
Minimum (West) Longitude: -140.00, Maximum (East) Longitude: 140.00

Primary point of contact information

EOL Data Support <datahelp@eol.ucar.edu>

Additional contact information

Citation

Weinstock, E., et al. 2006. CEPEX: NASA ER-2 Lyman Alpha Hygrometer Data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.26023/2RRX-RFPH-EA11. Accessed 06 Dec 2024.

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NSF

This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.