RADAR-COMPUTED RAINFALL COMPARED WITH OBSERVATIONS FROM A DENSE NETWORK OF RAIN GAUGES.
ENVIRONMENTAL TECHNICAL APPLICATIONS CENTER (AIR FORCE) WASHINGTON D C
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Using Wilsons Rainfall Rate - Echo Intensity RR-EI chart, based on the average relationship, radar data collected for 36 hours, using the US Weather Bureaus WSR-57 at Atlantic City, New Jersey, are compared with rainfall data from three tipping-bucket rain gauges. These tipping-bucket gauges are located within 60 nm of the radar and cover a 4.8 square-mile area. Comparisons between the radar and tipping-bucket gauges are shown. Radar measurements were within 2 of the total rain gauge average. The correlation coefficient was .91. Use of the US Weather Bureaus RR-EI chart would have underestimated the average areal precipitation. Hourly rainfall amounts of 0.01 inches were detected in 80 of the cases. Hourly amounts of 0.02 inches or more were detected in 100 of the cases. Author