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<br />. <br /> <br />e <br /> <br />18 <br />The FSSP sizes and counts individual cloud droplets by <br />detecting the light scattered from the laser beam as the droplets <br />pass through its aperture. The detected pulses are converted to <br />droplet si ze by a pulse height analyzer so that the instrument <br />provides a continuous measurement of the complete cloud droplet <br /> <br />. <br /> <br />. <br /> <br />size distribution. <br /> <br />LWC was then calculated from the measured <br /> <br />. <br /> <br />droplet spectrum. The FSSP was operated in the range of 3-45 I1ffi <br /> <br />wi th 3 pm intervals. The FSSP measurements of the droplet <br /> <br /> <br />spectrum are available at 0.1 sec time resolution. The sample <br /> <br />volume for the FSSP is 0.228 rrm2 times the true airspeed. This <br /> <br /> <br />instrument has undergone extensive testing and intercomparison <br /> <br />with other devices (see! Baumgardner and Dye, 1983) and has been <br /> <br />calibrated by use of glass beads and Mie scattering calculations <br /> <br />(Cerni,1983). <br /> <br />.e <br /> <br />. <br /> <br />.e <br /> <br />3.3.2 Particle Measuring Systems probes <br /> <br />. <br /> <br />Concentration of ice particles were measured by a complement <br /> <br />of PMS probes. TablE~ 3.1 lists PMS probes and its measurement <br /> <br />range in the Super King Air (N2UW). A description of the PMS <br /> <br />probes can be found in Knollenberg (1976). <br /> <br />. <br /> <br />3.3.3 Ice crystal slides <br /> <br />e <br /> <br />. <br /> <br />. <br />