## 2 Materials and Methods
### Data
#### 2.2.3 Ground-Borne Radar Precipitation Product (RAR)
\begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Type**} & **Station** & \multirow{2}{*}{**Longitude**} & \multirow{2}{*}{**Latitude**} & **Elevation** \\  & **(Abrev.)** & & & **[MASL\({}^{1}\)]** \\ \hline \multirow{6}{*}{Precipitation} & Gyebuk (GB) & 127\({}^{\circ}\)37\({}^{\prime}\)46\({}^{\prime\prime}\) E & 35\({}^{\circ}\)48\({}^{\prime}\)27\({}^{\prime\prime}\) N & 453.00 \\  & Jangse (JG) & 127\({}^{\circ}\)36\({}^{\prime}\)03\({}^{\prime\prime}\) E & 35\({}^{\circ}\)42\({}^{\prime}\)54\({}^{\prime\prime}\) N & 422.00 \\  & [PERSON] (CC) & 127\({}^{\circ}\)30\({}^{\prime}\)49\({}^{\prime\prime}\) E & 35\({}^{\circ}\)40\({}^{\prime}\)54\({}^{\prime\prime}\) N & 409.00 \\  & [PERSON] (SI) & 127\({}^{\circ}\)29\({}^{\prime}\)10\({}^{\prime\prime}\) E & 35\({}^{\circ}\)48\({}^{\prime}\)11\({}^{\prime\prime}\) N & 334.00 \\  & Bugwi (BG) & 127\({}^{\circ}\)24\({}^{\prime}\)12\({}^{\prime\prime}\) E & 35\({}^{\circ}\)51\({}^{\prime}\)36\({}^{\prime\prime}\) N & 396.00 \\  & Jucheon (JC) & 127\({}^{\circ}\)25\({}^{\prime}\)34\({}^{\prime\prime}\) E & 35\({}^{\circ}\)58\({}^{\prime}\)04\({}^{\prime\prime}\) N & 303.00 \\  & Ancheon (AC) & 127\({}^{\circ}\)32\({}^{\prime}\)48\({}^{\prime\prime}\) E & 35\({}^{\circ}\)52\({}^{\prime}\)01\({}^{\prime\prime}\) N & 313.00 \\ \hline \multirow{6}{*}{Discharge} & Yongdam Dam (YD) & 127\({}^{\circ}\)31\({}^{\prime}\)40\({}^{\prime\prime}\) E & 35\({}^{\circ}\)56\({}^{\prime}\)36\({}^{\prime\prime}\) N & 268.50 \\  & Cheoncheon (CC) & 127\({}^{\circ}\)31\({}^{\prime}\)38\({}^{\prime\prime}\) E & 35\({}^{\circ}\)47\({}^{\prime}\)19\({}^{\prime\prime}\) N & 273.50 \\  & [PERSON] (DH) & 127\({}^{\circ}\)32\({}^{\prime}\)41\({}^{\prime\prime}\) E & 35\({}^{\circ}\)49\({}^{\prime}\)59\({}^{\prime\prime}\) N & 291.50 \\  & [PERSON] (DC) & 127\({}^{\circ}\)27\({}^{\prime}\)27\({}^{\prime\prime}\) E & 35\({}^{\circ}\)48\({}^{\prime}\)43\({}^{\prime\prime}\) N & 261.10 \\  & [PERSON] (SI) & 127\({}^{\circ}\)26\({}^{\prime}\)24\({}^{\prime\prime}\) E & 35\({}^{\circ}\)51\({}^{\prime}\)16\({}^{\prime\prime}\) N & 266.48 \\  & [PERSON] (JC) & 127\({}^{\circ}\)25\({}^{\prime}\)58\({}^{\prime\prime}\) E & 35\({}^{\circ}\)58\({}^{\prime}\)03\({}^{\prime\prime}\) N & 270.86 \\ \hline \hline \end{tabular} Note: \({}^{1}\) Meters Above Sea Level.  
\end{table} 
Table 1: Locations of rain gauges and water level/flow stations. \begin{table}
\begin{tabular}{c c c} \hline \hline \multicolumn{3}{c}{**RAR Specifications**} \\ \hline File Name: RDR\_ROQCZ\_CP15 AA\_SYYYY\$MM$SDD$HH$SNN.bin.gz \\ \hline Resolution & Description \\ \hline Temporal & 10 min \\ Spatial & 1 km \\ \hline Data structure & Description \\ \hline Map system & Lambert Conformal Conic projection \\ Grid cell size & 1 km \\ X and Y dimension & 1241 and 1761 \\ Longitude of central meridian & 126.0\({}^{\circ}\) E (cell number 460) \\ Latitude of the projection origin & 38.0\({}^{\circ}\) N (cell number 925) \\ \hline \multicolumn{3}{c}{Data table structure} \\ Record & Item & Description \\ \hline
1 & Precipitation & float & mm/h \\
2 & Radar coverage & unsigned char & 0: inner/1: outer \\
3 & Map information & unsigned char & - \\ \hline \hline \end{tabular}
\end{table} 
Table 2: RAR data (version 2.0) specifications. Figure 3: Schematic diagram of RAR data estimation algorithm (version 2.0), taken from [47].