Fast 2D-S Data and Imagery

A 2D-S instrument is a cloud particle probe that contains two orthogonal open path optical array probes, which image cloud particles between about 10 microns - 2 mm in size as they pass through the instrument sample volume. This imagery is used to calculate the concentration and cross-sectional area size distributions, and to estimate the mass size distribution of the observed cloud particles. These variables are integrated across the size bins to obtain the total concentration, extinction, and estimated total water content over the observed size range, and is provided at a frequency of 1 Hz. The particle imagery can be utilized to infer cloud particle phase. This data does not cover the full size range of cloud particles, and should be analyzed in conjunction with complementary cloud probes, such as the CDP, HVPS, etc. This dataset contains Fast 2D-S data and imagery collected aboard the NCAR C-130 during the CAESAR project.

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Temporal Range

  • Begin:  2024-02-28T00:00:00Z
    End:  2024-04-03T23:59:59Z

Keywords

Resource Type dataset
Temporal Range Begin 2024-02-28T00:00:00Z
Temporal Range End 2024-04-03T23:59:59Z
Temporal Resolution N/A
Bounding Box North Lat 82.00000
Bounding Box South Lat 66.00000
Bounding Box West Long -14.00000
Bounding Box East Long 24.00000
Spatial Representation grid
Spatial Resolution N/A
Related Links

Documentation #1 : README_CAESAR_OAPs.pdf
Additional Information N/A
Resource Format Portable Network Graphics (PNG) in tar archive
NetCDF: Network Common Data Form (application/x-netcdf)
Standardized Resource Format NetCDF
Image
Asset Size 734 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 N/A
Distributor N/A
Metadata Contact Name EOL Data Support
Metadata Contact Email datahelp@eol.ucar.edu
Metadata Contact Organization N/A

Author Sarah Woods
Publisher N/A
Publication Date 2025-09-22T15:12:48
Digital Object Identifier (DOI) https://doi.org/10.26023/NFNP-51FQ-VX00
Alternate Identifier 638.014
Resource Version 1.1
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-10-07T21:49:19Z
Metadata Record Identifier edu.ucar.eol::638.014
Metadata Language eng; USA
Suggested Citation Sarah Woods. (2025). Fast 2D-S Data and Imagery. 1.1. https://doi.org/10.26023/NFNP-51FQ-VX00. Accessed 26 October 2025.

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