Field Measurement of Raindrop Size Spectra.
Abstract
A new instrument for measuring the concentration and size of raindrops at the ground is described. This instrument measures the time of flight of drops across a sample volume and thus does not require a measured or assumed drop velocity as do existing disdrometers. The signals expected from the device are analysed and a detailed description of the electronics complete with circuits diagrams is given. This is followed by the Z80 machine code routing for measuring the time of flight and size of the droplet in real time as they cross the sample volume, together with the high level program for subsequently sorting this data and printing the spectra. The procedure for setting up and calibrating the instrument is outlined and some sample results obtained in the field are presented. These results show that the device is working satisfactorily. Finally some suggestions for future work are given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1981
- Accession Number
- ADA103664
Entities
People
- A. J. Illingworth
Organizations
- University of Manchester