Accession Number : AD0645733

Title :   APPLICATION OF RADAR TO MEASUREMENT OF SURFACE PRECIPITATION.

Descriptive Note : Annual rept. no, 2, 1 Sep 65-31 Aug 66,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : Austin,Pauline M.

Report Date : DEC 1966

Pagination or Media Count : 17

Abstract : Instrumentation: The major undertaking in instrumentation has been the installation of two new radars on the roof of the Green Building, which houses the Center for Earth Sciences at MIT. This task is now practically complete. A digital delay-line sweep integrator has been designed and built, and is ready for use with the new 10 cm radar. Observations: Radar data were taken in 40 storms during the past year, mostly summer thunderstorms. Drop size samples and radar-rain gauge comparison measurements were obtained on only four days. Application and Analysis: In the study of mesoscale precipitation patterns and their relation to macroscale parameters, all storms for 1962 and 1963 have been classified according to synoptic type. Mesoscale patterns as depicted by the rain gauge network have been analyzed for each group. A numerical model for the evolution of a snowflake spectrum has been set up and computations carried as far as is feasible by hand. Results show quite good agreement with observed snowflake spectra. (Author)

Descriptors :   (*METEOROLOGICAL RADAR, *ATMOSPHERIC PRECIPITATION), RAINFALL, RAINDROPS, PARTICLE SIZE, MEASUREMENT, SNOW, STORMS, METEOROLOGICAL PHENOMENA, METEOROLOGY

Subject Categories : Meteorology
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE