Real-time correction of weather radar data for the effects of bright band, range and orographic growth in widespread precipitation

摘要: A new method of correcting data from the United Kingdom operational weather radar network is described. The physically based scheme designed to produce estimates instantaneous precipitation rate at surface by compensating for effects bright band, range and low-level orographic growth. In a preliminary study, characteristic shape vertical profile reflectivity factor was examined using climatological dataset derived range—height indication scans recorded high-resolution radar. results were then used construct an idealized profile. correction procedure, heights significant turning points in are diagnosed relevant meteorological each pixel. parametrized weighted radar-beam power found iterative real-time. has some important advantages over alternative strategies. Detailed quantitative evaluation typical cases mainly frontal rainfall southern England suggested that root-mean-square errors rates 5 km pixels reduced less than half compared same subject only fixed correction.