Abstract
An international network of Radio Frequency Interference (RFI) monitoring stations covering all L-band Global Navigation Satellite System (GNSS) signals has provided large amounts of data on the occurrence rates and characteristics of the detected sources. As the stations are primarily deployed by roadways the measurements include a large number of Personal Privacy Device (PPD)
style jammers as well as an unexpectedly large contingent of spurious emissions and co-authorized users. Important results include the high levels of variability in month-to-month activity levels of sites indicating that site survey activities must be conducted over longer periods to obtain accurate occurrence rate information.
style jammers as well as an unexpectedly large contingent of spurious emissions and co-authorized users. Important results include the high levels of variability in month-to-month activity levels of sites indicating that site survey activities must be conducted over longer periods to obtain accurate occurrence rate information.