As selected “preferred vendor” to UNAVCO for GNSS reference receivers, Septentrio's PolaRx family of GNSS receivers cover a wide variety of applications. Their unique design provides measurements with the lowest noise and cycle slip rate on the market while continuously monitoring and protecting against interference, multipath and other environmental effects. PolaRx incorporate Advanced Interference Mitigation (AIM+) technology counteracts the worse effects of interference. AIM+ allows users to obtain accurate and reliable GNSS positioning even in times of extreme radio interference and elevated ionospheric activity.