Accession Number : ADD011789

Title :   Fall Velocity Indicator/Viewer.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Berthel,R O ; Plank,V G ; Jones,S H ; Matthews,A J

Report Date : 30 Apr 1985

Pagination or Media Count : 8

Abstract : A fall velocity indicator/viewer having a sampling compartment, a camera system, and an elongated tunnel for interconnecting the camera system to the sampling compartment. The camera system includes a video camera for continuously monitoring snowflakes as they naturally fall through a viewing area in the sampling compartment. The snowflakes are illuminated by a pair of strobe lights directly and in combination with reflected light from a pair of mirrors. In addition, a mirror in the tunnel provides a reflected view from the top of the snowflakes. The video camera is capable of thereby monitoring multiple views of snowflakes in a single video frame and provide sufficient data to analyze the physical characteristics of th esnowflakes as well as aid in making velocity determinations and other observations of naturally falling snowflakes. (Author)

Descriptors :   *PATENTS, *METEOROLOGICAL INSTRUMENTS, VELOCIMETERS, MONITORING, VIEWERS, HYDROMETEORS, FALLING BODIES, SAMPLERS, CAMERAS, VIDEO RECORDING, STROBOSCOPES, REFLECTION, MIRRORS, SNOW, VELOCITY, INDICATORS, DATA ACQUISITION

Subject Categories : Meteorology
      Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE