FACSIMILE AND AREAL INTEGRATION FOR WEATHER RADAR. VOLUME I.
Abstract
Because of the fluctuating nature of the radar echo from randomly distributed precipitation particles, several individual echo measurements have to be averaged to provide a meaningful estimate of intensity. Photography of a chathode ray tube inevitably provides some averaging by integration on film, over the area of the writing spot. Further areal integration has been achieved by rectangular scanning of fast-processed film at a rate of a few lines per second with a spot of diameter one-half mile. The effective area of integration by first writing and then reading the pattern is one square mile. The areallyaveraged signals are subsequently stepped into seven levels, a factor 10 apart in received power, and displayed on a stepped grey scale on facsimile paper. This presentation is well suited for a visual quantitative estimate of echo intensity. Slow scanning results in a low frequency signal that can be sent over a voice-quality telephone line to provide within minutes radar weather maps in grey scale at any number of remote facsimile recorders. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0617600
Entities
People
- Marceli Wein
Organizations
- McGill University