Laserfiche WebLink
<br />The microphysics equipment included: <br /> <br />a. .An aspirated PMS (Particle Measuring System) two-dimensional cloud probe used to <br />record hundreds of two-dimensional snow crystal images per second. Images were <br />recorded to magnetic tape which could be processed to determine crystal sizes and <br />concentrations. Temperature, humidity, and ~ind speed and direction were recorded <br />eyery 10 s. <br /> <br />b. A microscope with camera, automatic exposure control, and cold stage attachment <br />allowed photomicrographs of snow crystals collected in petri dishes every 15 min to <br />be taken. These data were used to document crystal habit and degree of rime. Four <br />to five random photos of each dish were taken to characterize the snowfall. Also, a <br />manual record is kept of the crystal habits and riming as a backup to the phot.os. <br />Tri-X black and white film was used. Negatives ofthe photomicrographs were contact <br />printed as necessary for future analysis. <br /> <br />19 <br />