Holographic Detector for Clouds

Short Name:

HOLODEC

HAIS Instrument:

Manufacturer or Builder:

NCAR

TABS

Description

Model:

none

Measurements Provided:

Holograms of hydrometeors as they exist within the sensing aperture of the instrument.

General Description:

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.
The following are photographs of the instrument as installed on the GV (left) and C-130 (right):

Measurement Characteristics:

assessment in progress

Contacts

Lead Contact:

Matt Hayman

Alternate Contact:

Scott Spuler

Status/Plans

Current Location:

Not Available

Operational Status:

not on request list but could be available if requested

Problems - Documentation:

Detailed documentation is sketchy, especially for processing algorithms.

Data

Recent Projects That Used This Instrument:

ADELE-SPRITE and HEFT10 just archived .png files and .avi overviews, ICE-T, Final testing IDEAS 2011 (C130); IDEAS 2012 (King Air); first deployment IDEAS 2013 (GV), CSET

Deployments:

ADELE-SPRITE

HEFT10

ICE-T

IDEAS-4_C130

IDEAS-4 GV

CSET

ACE-ENA

Lifecycle

Date Acquired:

January, 2011

Serial Numbers

Property Tag and/or Serial Number:

Not Available

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Manufacturer or Builder:

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