Accession Number:

AD0625964

Title:

APPLICATION OF WEATHER RADAR TO INTENSITY OF SURFACE PRECIPITATION.

Descriptive Note:

Final rept. 1 Sep 63-31 Aug 65,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF METEOROLOGY

Personal Author(s):

• AUSTIN,Pauline M.

Report Date:

1965-10-31

Pagination or Media Count:

51.0

Abstract:

The purpose of the research under this contract is to investigate the accuracy with which measurements of precipitation may be made by radar and to develop instrumentation and techniques for improving such measurements. There are four aspects to the work instrumentation, observations, data processing, and analysis and applications. The project has been operating three radars an ANCPS-9, an SCR-615-B, and a 3.2 cm experimental radar. Auxiliary equipment for the radars includes two delay-line sweep integrators. Work has continued on a data processor which is designed to reduce radar data to digital form. An experimental model was built of a device to count and size raindrops by measuring the terminal fall velcoities as they fall through a fixed vertical interval. Routine radar operations sampled the volume of atmosphere just above the recording rain gauges drop size samples were obtained. Reduction of radar data to digital maps is being made and machine computations are made of the distribution and amounts of precipitation. From these two types of data the meso-scale characteristics of the precipitation are being deduced and are being compared with the large scale synoptic patterns. An analysis has been made of the problems encountered in measuring precipitation by radar, and is presented in Research Report No. 36. Author

Descriptors:

• RADAR
• ATMOSPHERICS
• METEOROLOGY
• RAINFALL
• RAINDROPS
• PARTICLE SIZE
• RADAR EQUIPMENT

Subject Categories:

• Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE