WEATHER RADAR SYSTEMS RESEARCH. RESEARCH TOWARD EFFECTIVE USE OF WEATHER RADAR DATA IN WEATHER ANALYSIS AND FORECASTING

IN MAKING WEATHER OBSERVATIONS WITH RADAR, CAREFUL CONSIDERATION SHOULD BE GIVEN TO THE DURATION OF AND INTERVAL BETWEEN OBSERVATIONS. Correct observation interval and duration can serve to facilitate and emphasize certain changes in storms and sometimes suppress or entirely eliminate undesired indications. Experiments and routine operations with unusual observation intervals and durations by means of photographic techniques suggest that improved methods for observation, interpretation, and study of storm circulations and movements of different magnitude may be readily developed. A possibility exists of finding hitherto unobserved atmospheric motions and variations by experiments with different degrees of time compression of radar observations and by analysis of the indications through narrow band-pass analytical filters, so that only those variations or motions in or of the storm which occurred at narrowly defined rates are displayed. The upper limits of time compression factor which can be used in a given situation appear to be dictated by the amount of time the region of interest in a disturbance remains within radar range. In some cases it may be possible to employ very large time compressions by use of observations over an area, or composite radar observations. (Author)