344
H. Yan et al.
Fig. 28.11 Event stereo
location under global guard
sensor
Channel
Impacts
Fig. 28.12 Impact number of channel under global guard sensor
part with guard sensor and there are location events in the part without guard
sensor. It can be seen that the coverage of the guard sensor is the same as that of
the main sensor. When applying the guard sensor, one-to-one correspondence
with the main sensor is needed to play the role of full guard.
(3) It can be seen from Figs. 28.9 and 28.12 that there is a slight difference between
the channel impact number of the guard sensor and that of the main sensor, but
it can be seen from Figs. 28.10 and 28.13 that the number of positioning events
of the guard sensor is much higher than that of the main sensor. It can be seen