# State-of-the-Art Mobile Radiation Detection Systems for Different Scenarios
## 3 Mobile Platforms
### Air-Based Platforms
#### 3.3.2 Unmanned Aerial Vehicle
\begin{table}
\begin{tabular}{l l l l l} \hline \hline
**Platform** & **Advantages** & **Limitations** & **Ref.** \\ \hline \multicolumn{4}{l}{Air-based—Unmanned:} \\ \multicolumn{4}{l}{General characteristic: No dose risks to operators} \\ \multicolumn{4}{l}{-} & \multicolumn{1}{l}{Medium endurance} \\ \multicolumn{4}{l}{(6 h)} \\ \multicolumn{4}{l}{-} & \multicolumn{1}{l}{Reasonably} \\ \multicolumn{4}{l}{} & \multicolumn{1}{l}{deployment time} \\ \multicolumn{4}{l}{} & \multicolumn{1}{l}{(25–35 m/s)} \\ \multicolumn{4}{l}{-} & \multicolumn{1}{l}{Good fuel efficiency} & \multicolumn{1}{l}{(than multi-rotor)} \\ \multicolumn{4}{l}{-} & \multicolumn{1}{l}{Large area coverage} & \multicolumn{1}{l}{-} & \multicolumn{1}{l}{Payload limitation} \\ Fixed-wing (e.g., & \multicolumn{1}{l}{-} & \multicolumn{1}{l}{Large remote} & \multicolumn{1}{l}{(approximately 10 kg)} \\ UARMS UAV) & \multicolumn{1}{l}{-} & \multicolumn{1}{l}{Vendor distance} & \multicolumn{1}{l}{-} & \multicolumn{1}{l}{Weather limitation (rain} \\  & \multicolumn{1}{l}{(100 km)} & \multicolumn{1}{l}{and wind)} \\ \multicolumn{4}{l}{-} & \multicolumn{1}{l}{Low costs} & \multicolumn{1}{l}{-} & \multicolumn{1}{l}{Low costs} \\ \multicolumn{4}{l}{-} & \multicolumn{1}{l}{Lower altitudes and} \\ \multicolumn{4}{l}{-} & \multicolumn{1}{l}{speed than manned} \\ \multicolumn{4}{l}{fixed-wing (better} \\ \multicolumn{4}{l}{spatial resolution)} \\ \hline \hline  & - & Medium/low & - & Requires more training \\  & & endurance (90 min) & (than multi-rotor) \\  & - & VTOL and loitering & - & Initial investment \\  & - & Lower altitudes and & Compared to fixed-wing \\ Helicopter (e.g., & & speed than & has: \\ UHMS) & & unmanned & - & Shorter remote operation \\  & & fixed-wing (better \\  & & spatial resol.) & - & Low payload capacity \\  & - & High & (approximately 10 kg) \\  & & maneuverability & - & Lower maximum speed \\  & - & Low operation costs & (longer surveys) \\ \hline \hline  & - & Low endurance (20 & \\  & & min) & \\  & - & VTOL and loitering & - & Very short remote \\  & - & Very low altitudes & operation dist. (\(<\)500 m) \\ Multi-rotor & & and speed (high \\ (a.k.a. drones) & & spatial resolution) & - & Low payload capacity \\  & - & Very low costs & - & Greater weather \\  & - & High & limitations \\  & - & maneuverability & \\  & - & Easy to operate & \\ \hline \hline  & - & High endurance (Low & \\  & & fuel consumption) & - & Poor maneuverability \\ Blimp, balloon1 & - & VTOL and loitering & - & Weather limitations (low \\  & - & Low operation cost & wind conditions) \\  & - & Low vibrations, noise, and turbulence & - & Low speed \\ \hline Hybrid & - & Same advantages as & \\  & & blimps & - & Weather limitations (low \\  & plane-blimp (e.g., & - \\  & PLIMP) 1  & - & Better & - \\  & PLIMP) 1  & - & maneuverability than \\  & & blimps & - & \\ \hline VTOL & - & No runway needed & - & Complex system \\ Fixed-wing1  & - & Same disadvantages as & [71] \\  & & fixed-wing & fixed-wing & fixed-wing \\ \hline \hline \end{tabular}
\end{table} 
Table 2: \(Cont.\)