Power distribution systems and methods are described. An object extracted from the at least one image captured by the camera is identified as a raindrop, if a confidence value assigned to the extracted object is above a predetermined threshold value. A time to fix the vulnerability identified by the vulnerability assessment of the system is based on the determined vulnerability score. The second memory card is associated with a second file system. The method and apparatus of the present invention are advantageous in that signaling overheads required for specifying the number and position of frequency resources allocated to each of E-MBS zones can be reduced.