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HVPS-3 Imagery -- png format



The HVPS-3 instrument, or High Volume Precipitation Spectrometer, is an open path optical array probe. Unlike the 2D-S, the HVPS has a single channel, which images cloud particles between about 150 microns - 19 mm in size, with 150 micron resolution, 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 and precipitation 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, 2D-S or 2DC, etc. This dataset contains HVPS-3 imagery in png format collected aboard the NCAR C-130 during the CAESAR project.

The images have been combined into hour long tarfiles running from zero minutes zero seconds to 59 minutes 59 seconds after each hour.  Note that the first and last tarfile for each flight will contain less than a full hour of imagery. Directory files returned with each order give the contents of each corresponding tar file.

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Additional information

Data Quality preliminary
  • 0.1 (2024-05-23):
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Related projects
Spatial Type raster
Frequency < 1 second
Language English
GCMD Science Keywords Expand keywords
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Related links

Temporal coverage

Begin datetime 2024-02-09 15:52:21
End datetime 2024-04-03 16:02:41

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 82.00, Minimum (South) Latitude: 66.00
Minimum (West) Longitude: -14.00, Maximum (East) Longitude: 24.00

Primary point of contact information

UCAR/NCAR - Earth Observing Laboratory

Additional contact information


Woods, S. 2024. HVPS-3 Imagery -- png format. Version 0.1 [PRELIMINARY]. UCAR/NCAR - Earth Observing Laboratory. Accessed 12 Jul 2024.

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Ancillary information

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