Accession Number : AD0837282

Title :   APPLICATION OF RADAR TO MEASUREMENT OF SURFACE PRECIPITATION.

Descriptive Note : Final rept. 1 Sep 65-31 Aug 67,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : Austin, Pauline M.

Report Date : MAR 1968

Pagination or Media Count : 23

Abstract : Work in instrumentation was primarily concerned with installation of new radars and auxiliary equipment. The 10-cm WR-66 radar has an 18-ft parabolic dish which provides high resolution and sensitivity. The signal is averaged by a digital sweep integrator, range-normalized, and quantized into intensity levels which can be displayed on the scope in three shades of gray. A data processor for digital mapping in Cartesian coordinates has been designed. The instruments and techniques which have been developed and are now in operation have overcome many of the limitations in the earlier models. A comprehensive study of mesoscale precipitation patterns and their relation to marcroscale parameters, based on all the storms which occurred during 1962-1963, is in progress. These storms have been grouped according to synoptic type, and analysis of air mass storms and coastal cyclones has been completed. Some preliminary computations have been made on a numerical model for aggregation of snowflakes, a process of importance in the development of raindrop size distributions. (Author)

Descriptors :   *METEOROLOGICAL RADAR), (*ATMOSPHERIC PRECIPITATION, AIR MASS ANALYSIS, HYGROMETERS, STORMS, CONVECTION(ATMOSPHERIC), RADAR EQUIPMENT, DIGITAL SYSTEMS, MAPPING, SNOW, CYCLONES, INSTRUMENTATION, DISTRIBUTION, PREDICTIONS, DATA PROCESSING, PARABOLIC ANTENNAS, MATHEMATICAL MODELS, PARTICLE SIZE, RAINDROPS.

Subject Categories : Meteorology
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE