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You are here : eLibrary : IAHR World Congress Proceedings : 32nd Congress - Venice (2007) : THEME B: Data Acquisition and Processing For Scientific Knowledge and Public Awareness. : On the ground-truth designs of radar rainfall
On the ground-truth designs of radar rainfall
Author : Yoo, Chulsang, Kim, Byoungsoo,Kim, Kyoungjun ,Choi, Jeongho
This study evaluated three possible ground-truths for the radar rainfall. Three ground-truth designs of comparing radar rainfall and rain gauge rainfall in this study are: (1) the design 1 is to use all the datasets available including zero radar rainfall and zero rain gauge rainfall, (2) the design 2 is to use the data sets of positive radar rainfall and zero or positive rain gauge rainfall, (3) and the design 3 is to use the data sets of positive radar rainfall and positive rain gauge rainfall. Theoretical review of these three designs show that the ground-truth designs 1 and 2 do not cause any design bias but the ground-truth design 3 can cause a negative design bias. This theoretical result was also assured by applying these three designs to the rainfall field generated by the WGR model, as well as to that of the Mt. Gwanak radar system. In conclusion, the ground-truth design 3, which considers only positive rainfalls for both radar and rain gauges, causes a serious design bias to be inappropriate as a ground-truth design.
File Size : 1,647,009 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 32nd Congress - Venice (2007)
Article : THEME B: Data Acquisition and Processing For Scientific Knowledge and Public Awareness.
Date Published : 01/07/2007
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