STUDY ON THE IDENTIFICATION METHOD OF RADAR CONSTANTS B AND β

Abstract

Nearly 10 years have passed since the Ministry of Construction installed radar rain gauge on Mt. Akagi and put it into operation in 1976. Radar rain gauges have since attested to their effects (realtime operability, large coverage area, comprehensiveness and the detection of local heavy rains) and 14 radars are in operation.But only recently all the 14 became in operation and various methods are still being tested to identify radar constants (B, β, etc.) to convert received power reflected from rain into an amount of rainfall.Foundation of River/Basin Integrated Communications (FRICS), has since its inception in October 1985 handled the work of studying to improve radar accuracy at the request of Regional Construction Bureaus as FRICS publishes radar data, etc. As a byproduct of this work, the authors have been able to prepare a method to identify radar constants. They hereby propose it and solicit readers' comments.