To INTEX-A data users:

The final archived cloud liquid and ice water content (LWC,IWC) data have been included in the LAERO-LWC files. 


The file contains three values of LWC and two for IWC. They are
   1. LWC-HW - cloud LWC measured by the LWC-100 hot wire probe (10-40 microns)
   2. LWC-CAS - cloud LWC derived by the Cloud Aerosol Spectrometer Wing Probe (5-50 microns)
   3. LWC-CIP - cloud LWC derived by the Cloud Imagining Probe Wing Probe (50-1550 microns)
   4. IWC-CAS - cloud IWC derived by the Cloud Aerosol Spectrometer Wing Probe (5-50 microns)
   5. IWC-CIP - cloud IWC derived by the Cloud Imagining Probe Wing Probe (50-1550 microns)


The delination between liquid water and ice water clouds followed the convention 
used in Heymsfield and Miloshevich (1989) of:
   1. Liquid Cloud - T > -20 deg C
   2. Mixed Phase Cloud - T < -20 deg C and T > -40 deg C
   3. ICE Cloud - T < -40 deg C


If the cloud was considered a mixed phase cloud, then then droplets less than 100 microns were considered to 
be liquid and droplets greater than 100 microns were considered ice. 


For an ice cloud, it was assumed that there would be no cloud LWC, and therefore all droplets encountered 
would be ice.


An ice particle density was assumed, following the work of Brown and Francis (1995) of 
   ice_density(D > 100 microns) = 0.07 * Diam**(-1.1)
   ice_density(D < 100 microns) = 0.92 g/m3
   liquid_water_density = 1.0
where for us, the Diam is the CIP Bin Size (in mm)



There were several rain encountered during INTEX-A, and they were recorded either by flight notes or 
viewing the forward looking video. They are:

Flight     Time      Comment
------     ----      --------
6          15:00     Intermittent Rain, only showing on CIP
           17:20     In precip, between cloud layers
           20:27     Rain
           
8          16:07     In clouds, some precip on windshield

10         20:10     Few drops of precip on windshield

12         15:10-2   Rain drops on windshield

17         17:49-50  Rain
           18:00     Still raining at 6 kft
           18:10     Still in cloud/precip
           19:23     Passing through cloud/precip
           19:53     Falling ice
           20:15     Precip hitting forward video
           20:27     Precip
           20:42     Heavy Precip
           
18         12:16     Hitting Ice

20         19:29:50  Rain on windshield
           19:33:50  Heavy Rain
           19:34:20  Out of rain


The LWC and IWC units are g/m3


Please contact Lee Thornhill if you have any questions concerning this data.
E-Mail:	k.l.thornhill@larc.nasa.gov
Voice:	(757) 827-4502



References:
Brown, P.R.A., and P.N. Francis, 1995: Improved measurements of the ice water content in cirrus 
     using a total water probe, J. Atmos. Oceanic. Technol., 12, 410-414.
Helymfield, Andrew, and Larry M. Miloshevich, 1989: Evaluation of Liquid Water Measuring Instruments
     in Cloud Clouds Sampled during FIRE, J. Atmos. Oceanic Technol., 6, 378-388.