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Spoofing is a malicious attack in which a false GNSS signal is transmitted to cause a receiver to obtain an erroneous position and time fix. In some cases, the error may only be a time shift of a 100 mSec, but that is enough to cause significant damage to systems. This can be catastrophic for any type of critical infrastructure such as energy and telecommunications that are required to maintain almost 100% uptime.
To detect the presence of a Spoofing attack, a GNSS receiver that is capable of monitoring multiple signal parameters from different GNSS constellations is required to identify any abnormal change in each of the received satellite signals. It is important to have a log of the signals over a period in order to quickly identify anything abnormal. If an abnormality is found then to mitigate against the attack the receiver should shut down reception from the signal source.
In addition, monitoring for narrow-band interference, like jamming of a GNSS constellation / frequency, should have the same signal quality monitoring and should have the ability to set thresholds for interference detection for each signal frequency.
The Quazar-700 from Bitstream is able to achieve all this and more: