[Dataset Title]
2DS particle images from NRC Convair580 flights collected during the ICICLE project out of Rockford Illinois

[Dataset Author(s)]
Data quality and processing.
Lead: Alexei Korolev, Environment and Climate Change Canada  alexei.korolev@canada.ca
Ivan Heckman, Environment and Climate Change Canada ivan.heckman@canada.ca

[Custodianship]
NRC 2DS: National Research Council
ECCC 2DS: Environment and Climate Change Canada

[Acknowledgements]
NRC 2DS data collection was performed by Leonid Nichman (NRC) and Mengistu Wolde (NRC)
ECCC 2DS data collection was performed by Mike Harwood (ECCC) or Jason Iwachow (ECCC)

[Calibrations]
n/a

[Funding]
The ICICLE project was funded by the Federal Aviation Administration (FAA). Principal Investigator Stephanie DiVito.

[Time of Interest]
2019-01-28 20:08:36 - 2019-03-07 21:06:54 UTC

[Area of Interest]
39.3290 to 43.3550 N    -91.9840 to -84.5950 E

[Data Frequency]
1 second

[Data Spatial Type] 
particle images over time

[General Dataset Description] 
SPEC 2-Dimensional Stereo (2DS) sample shadow images 
Shadow image data from 2DS instruments were converted into a format similar to older PMS instruments as 1024 pixel wide buffers, and individual frames denoted by a single column starting with a series of white a black pixels.
The 2DS images are 128 bits high. Each pixel is 10um.  The sample rate of the instruments was synchronized to the true airspeed of the aircraft to make the pixels roughly square. There were 4 sources of 2DS images: both the Horizontal and Vertical channels of 2DSs owned by ECCC, and NRC. One source was chosen per flight and is denoted in the png filenames. The name of the png files also contains the approximate date and time before the first buffer printed in that file. One 1024bit wide buffer is printed for each second of a flight if data existed for that time.


[File Names]
ICICLE_Convair_2DS_images_v0200508.zip
	Includes : 	FXX/FXX_2DS(H|V)_(ECCC|NRC)_yyyymmdd_HHMMSS.png

[Data restrictions]
Restricted
Password requested
Preliminary data restricted to ICICLE participants

[Digital Object Identifier (DOI)]
no DOI 

[GCMD Keywords]
EARTH SCIENCE ATMOSPHERE    CLOUDS               CLOUD MICROPHYSICS  CLOUD LIQUID WATER/ICE                                          
05ac9d3e-bc44-41fa-ace0-c41bf3ebee97