This extremely low value reflects the limited operational flexibility of fixed monitoring systems, which are primarily designed for long-term measurements at predefined locations. Mobile monitoring systems offer significantly higher operational flexibility. In this study, the mobile monitoring network is assumed to cover approximately 9.8 km² of the urban area through multiple monitoring routes. Considering that a typical urban monitoring zone represents roughly 1 km², the number of distinct areas that can be monitored is estimated as N_areas=10. Because mobile stations can be rapidly redirected toward areas of interest, their responsiveness factor is considered high (F_responsiveness=0.9). In addition, mobile platforms can be reused for multiple monitoring campaigns and locations, resulting in a high reuse rate (R_reuse=0.9). Deployment time is significantly shorter than for fixed stations; mobile units can typically be installed and operational within a few hours, corresponding to T_deployment=0.25 days. Finally, the cost of relocation is relatively low since changing monitoring routes only requires adjusting the vehicle itinerary, which corresponds to C_displacement=2. Using these parameters, the flexibility index for mobile monitoring systems becomes:

This remarkably low figure demonstrates how fixed monitoring systems lack operational flexibility, as they are built specifically for collecting long-term data at predetermined sites. Mobile monitoring systems provide much greater operational flexibility. For this research, we assume the mobile monitoring network covers about 9.8 km² of urban territory using several monitoring routes. Since a standard urban monitoring zone typically spans around 1 km², we estimate that N_areas=10 separate areas can be monitored. Mobile stations can quickly shift to focus on areas of interest, giving them a high responsiveness factor (F_responsiveness=0.9). Additionally, mobile platforms can serve multiple monitoring projects and locations, which creates a high reuse rate (R_reuse=0.9). Setting up mobile units takes much less time than fixed stations - they can usually be installed and running within hours, giving us T_deployment=0.25 days. The cost of moving to new locations remains relatively low because switching monitoring routes simply means changing the vehicle's path, resulting in C_displacement=2. When we apply these parameters, the flexibility index for mobile monitoring systems equals: