# Analysis of Drone Flight Stability for Building a Korean Urban Air Traffic (K-UAM) Delivery System
## 4 Drone Flight Data Analysis--Route  
In this study, the drone flight areas of UIju, Yeosu, and Tongyeong among the local governments participating in the K-drone in Figure 2 are briefly shown in Figure 5. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Designation** & **Latitude and Longitude of Origin** & **Area of Application** \\ \hline \multirow{2}{*}{UTM-K} & Longitude: 127\({}^{\circ}\) 30\({}^{\prime}\) 00.0000\({}^{\prime\prime}\) E & All over the Korean \\  & Latitude: 38\({}^{\circ}\) 00\({}^{\prime}\) 00.0000\({}^{\prime\prime}\) N & Peninsula \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Korean UTM-K coordinate system using WGS84 ellipsoid. Figure 4: Korean UTM-K coordinate system and origin point within the Korean Peninsula. Figure 3: Universal Transverse Mercator (UTM) grid area of the world displayed on a horizontally extended equidistant cylindrical projection index map [21]. A drone delivery flight route was planned passing through each delivery point and returning to a previously designated demonstration city with regional bases. In this paper, we introduce a drone delivery route that passes through specific points and returns to the city of Uliu, using the Operations Office and Jinha Public Parking Lot as two bases. All drone flight path courses in Uliu are listed in detail in Table 2, Figure 6, and Figure 7. In Figure 6 and Table 2, the Operations Office is abbreviated as Office. In Figure 7 and Table 2, the Jinha Public Parking Lot is abbreviated as Jinha. Figures 6 and 7 show the planned drone delivery route for the demonstration project and the actual measured drone flight route on the map. The planned drone flight path is a line connecting the points that the drone must pass through, marked in red, and the blue line is the actual flight route of the drone. Visually and on the map, the planned route and the actual drone flight route appear to match. However, there are rules that must be followed in order to write a drone delivery flight test report as the goal of this project. First, the drone must maintain flight within a margin of error of 10 m from the planned route line. Second, the drone's flight altitude must also be maintained within 3 to 10 m of the planned flight altitude. For this purpose, it is necessary to perform calculations comparing the planned route with the drone's flight data for the entire section. \begin{table}
\begin{tabular}{c c} \hline \hline
**Base Point** & **Course** \\ \hline \multirow{4}{*}{Operations Office (Office)} & (a) Office \(\rightarrow\) Uliu Sports Complex \(\rightarrow\) Office \\  & (b) Office \(\rightarrow\) Complex Welcome Center \(\rightarrow\) Office \\ \cline{1-1}  & (c) Office \(\rightarrow\) Moonlight Campground \(\rightarrow\) Office \\ \cline{1-1}  & (d) Office \(\rightarrow\) Starlight Campground \(\rightarrow\) Office \\ \hline \multirow{4}{*}{Jinha Public Parking Lot (Jinha)} & (e) Jinha \(\rightarrow\) Marine Sports Center \(\rightarrow\) Jinha \\ \cline{1-1}  & (f) Jinha \(\rightarrow\) Ganjelgot Sports Park \(\rightarrow\) Jinha \\ \cline{1-1}  & (g) Jinha \(\rightarrow\) Solgae Park \(\rightarrow\) Jinha \\ \cline{1-1}  & (h) Jinha \(\rightarrow\) Myeongseon Bridge \(\rightarrow\) Jinha \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Drone flight path course in Uliu. Figure 5: Cities collecting flight data for drone delivery demonstrations. (**a**) Uliu, (**b**) Yeosu, (**c**) Tongyeong. Figure 6: Drone flight path course based on the Operations Office in Table 2 (Red points: Planned drone delivery route. Blue line: Collected drone flight path data). Figure 7: Cont. Therefore, using the UTM-K coordinate system described in Section 3, the latitude and longitude values were projected into x-y rectangular coordinates, and the altitude was used as the z coordinate to perform calculations and analyze the drone's flight data.