  Global Navigation Satellite Systems (GNSS) provide global positioning and
timing. Multiple receivers with known reference positions (stations) can assist
mobile receivers (rovers) in obtaining GNSS corrections and achieve
centimeter-level accuracy on consumer devices. However, GNSS spoofing and
jamming, nowadays achievable with off-the-shelf devices, are serious threats to
the integrity and robustness of public correction networks. In this demo, we
show how manipulation of the Position Navigation and Timing (PNT) solution at
the reference station is reflected in the loss of baseline fix or degraded
accuracy at the rover. Real Time Kinematics (RTK) corrections are valuable but
fundamentally vulnerable: attacking the reference stations can harm all
receivers (rovers) that rely on the targeted reference station.
