NASA ER-2 Lyman Alpha Hygrometer Data

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).

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Temporal Range

  • Begin:  1993-03-17T00:00:00Z
    End:  1993-04-05T23:59:59Z

Keywords

Resource Type dataset
Temporal Range Begin 1993-03-17T00:00:00Z
Temporal Range End 1993-04-05T23:59:59Z
Temporal Resolution N/A
Bounding Box North Lat 20.00000
Bounding Box South Lat -20.00000
Bounding Box West Long -140.00000
Bounding Box East Long 140.00000
Spatial Representation grid
Spatial Resolution N/A
Related Links N/A
Additional Information N/A
Resource Format NetCDF: Network Common Data Form (application/x-netcdf)
Standardized Resource Format NetCDF
Asset Size 1 MB
Legal Constraints

none
Access Constraints none
Software Implementation Language N/A

Resource Support Name EOL Data Support
Resource Support Email datahelp@eol.ucar.edu
Resource Support Organization NSF NCAR Earth Observing Laboratory
Distributor NSF NCAR Earth Observing Laboratory
Metadata Contact Name EOL Data Support
Metadata Contact Email datahelp@eol.ucar.edu
Metadata Contact Organization NSF NCAR Earth Observing Laboratory

Author Elliot M. Weinstock
Eric J. Hintsa ORCID icon
Andrew E. Dessler ORCID icon
James G. Anderson
Publisher NSF NCAR Earth Observing Laboratory
Publication Date 2006-07-26T13:58:56
Digital Object Identifier (DOI) https://doi.org/10.26023/2RRX-RFPH-EA11
Alternate Identifier 6.23
Resource Version 1.0
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-10-07T21:46:30Z
Metadata Record Identifier edu.ucar.eol::6.23
Metadata Language eng; USA
Suggested Citation Elliot M. Weinstock, Eric J. Hintsa, Andrew E. Dessler, James G. Anderson. (2006). NASA ER-2 Lyman Alpha Hygrometer Data. 1.0. NSF NCAR Earth Observing Laboratory. https://doi.org/10.26023/2RRX-RFPH-EA11. Accessed 24 January 2026.

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