Temperature and water vapor humidity determine crystalline forms. Ice crystals are responsible for various atmospheric optics displays in the atmosphere. The principal axis (c axis) of a single crystal of ice is perpendicular to the axis of hexagonal symmetry. Planes perpendicular to this axis are called basal planes. Ice clouds are composed of ice crystals. The most notable one is cirrus and ice fog.
"System and Method to Identify Regions of Airspace Having Ice Crystals Using an Onboard Weather Radar System" in Patent Application Approval Process
Oct 03, 2013; By a News Reporter-Staff News Editor at Politics & Government Week -- A patent application by the inventors Bunch, Brian P....