User's Guide

Mod: MDM/011/M4 Rev 2
IDS GeoRadar User Guide QGG/2020/002 Rev. 1.1
4.3.1 Operating range
4.3.1.1 RockSpot system is designed to operate in a wide range, however system detection performances worsen with
increasing distance. Rockfall occurring beyond the RockSpot maximum operating range cannot be detected by the
system.
4.3.2 Field of View
4.3.2.1 RockSpot system is designed to operate in a wide Field of View (FoV), however system detection performances shown
in the data sheet are valid at the FoV center and worsen approaching the FoV limits. Rockfall occurring outside the
RockSpot FoV cannot be detected by the system.
4.3.3 Rock sizes
4.3.3.1 RockSpot system provides state-of-the-art performance in terms of rock size sensitivity detection. Detection
probability increases with the boulder size. Falling of rocks with small dimensions may not be detected by the
Rockspot.
4.3.4 Alarm activation time
4.3.4.1 RockSpot system is designed to trigger an output signal as soon as possible after the rock detachment. However, the
activation time depends on the quality of the signal reflected by the falling rock, and in some circumstances, it is not
possible to guarantee the output signal activation in due time. It is solely in the user responsibility to assess if the
scenario conditions and event characteristics allow for a sufficient alert time; for example, if fall time of a rock is too
short the alert cannot be triggered early enough.
4.3.5 Alarm activation sensitivity
4.3.5.1 RockSpot system provides state-of-the-art performance in terms of rockfall alarm activation sensitivity. RockSpot
sensitivity depends on the quality of the signal reflected by the falling rock, which is influenced by many factors
including but not limited to the distance, the angle of view, the boulder size, the boulder shape, the boulder material,
the boulder surface roughness and the falling dynamics. Therefore, the RockSpot detection performance cannot be
constant throughout the entire monitored scenario and on all the possible events. This may lead to insufficient or
improper detection of rockfall events, which IDS GeoRadar is not liable for.
4.3.6 Line of Sight