  Due to the widespread deployment of Global Navigation Satellite Systems
(GNSSs) for critical road or urban applications, one of the major challenges to
be solved is the provision of integrity to terrestrial environments, so that
GNSS may be safety used in these applications. To do so, the integrity of the
received GNSS signal must be analyzed in order to detect some local effect
disturbing the received signal. This is desirable because the presence of some
local effect may cause large position errors, and hence compromise the signal
integrity. Moreover, the detection of such disturbing effects must be done
before some pre-established delay. This kind of detection lies within the field
of transient change detection. In this work, a finite moving average stopping
time is proposed in order to approach the signal integrity problem with a
transient change detection framework. The statistical performance of this
stopping time is investigated and compared, in the context of multipath
detection, to other different methods available in the literature. Numerical
results are presented in order to assess their performance.
