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Holographic Detector for Clouds (HOLODEC 2) - RAW (.seq) data format [EOL/RAF]

Project:

CSET

Summary

This dataset contains measurements of cloud particle size distributions collected during the CSET (Cloud System Evolution in the Trades) project using an airborne holographic instrument (HOLODEC 2) mounted on the NSF/NCAR GV HIAPER (Gulfstream-V High-performance Instrumented Airborne Platform for Environmental Research) (N677F). The HOLODEC-II is a second-generation version of a holographic detecter designed to determine the size, two-dimensional shape, and three-dimensional position of hydrometeors via digital in-line holography. Advantages vs other hydrometeor detectors are that the sample volume is not size dependent, relative positions of hydrometeors in the sample volume can be determined in three dimensions, and effects produced by shattering from the aperture edges can be identified and eliminated. Automated analysis programs have been develop to process the holograms collected and produce size distributions. HOLODEC-II has sufficient resolution to determine the sizes and locations of cloud droplets as well as ice crystals.

Data access

This dataset is not currently available online. For more information, please email the primary point of contact.

Additional information

Identifier	DOI: https://doi.org/10.26023/5V8H-00AM-9Q06
Data Quality	final
Versions	0.1 (2015-08-03) 1.0 (2021-08-26)
Subscribe	Subscribe to receive email when new or updated data is available.
Related projects	CSET: Cloud System Evolution in the Trades
Spatial Type	raster
Frequency	1 second
Language	English
Categories	Aircraft
Platforms	NSF/NCAR GV HIAPER
Instruments	HOLODEC - Holographic Detector for Clouds
GCMD Science Keywords	CLOUD DROPLET DISTRIBUTION HYDROMETEORS PARTICLE SIZE DISTRIBUTION Expand keywords
Documentation	CSET_log_RF16.txt [1 KiB]
Related links	companion: 487.034: Holographic Detector for Clouds (HOLODEC) Reconstructed Data (_hist.mat files) (S. Glienke (MTU)) companion: 487.027: Holographic Detector for Clouds (HOLODEC) particle-by-particle data [Shaw,R.,S. Glienke (MTU)] info: CSET Data Policy homepage: CSET Home Page info: CSET Missions info: Holographic Detector for Clouds

Temporal coverage

Begin datetime	2015-06-26 20:00:54
End datetime	2015-08-12 22:04:09

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 50.00, Minimum (South) Latitude: 15.00
Minimum (West) Longitude: -160.00, Maximum (East) Longitude: -120.00

Primary point of contact information

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

Citation

UCAR/NCAR - Earth Observing Laboratory. 2021. Holographic Detector for Clouds (HOLODEC 2) - RAW (.seq) data format. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.26023/5V8H-00AM-9Q06. Accessed 20 Apr 2024.

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