Compatibility between FM sound-broadcasting systems in the frequency band of about 87-108 MHz and the aeronautical ground-based augmentation system in the frequency band 108-117.975 MHz
Resolution 413 (WRC-03) invited ITU-R to study any compatibility issues between the broadcasting and aeronautical services operating around 108 MHz and to develop new or revised ITU-R Recommendations as appropriate. This Recommendation provides technical and operational requirements that may be used by administrations as a technical guideline for establishing the compatibility of the ICAO ground-based augmentation system (GBAS) above 108 MHz and frequency modulation (FM) broadcasting systems operating up to 108 MHz.