Numerous unmanned aircraft (UA) applications have been demonstrated or are planned that will dramatically increase the numbers of UA worldwide. With integration of UA into non-segregated airspace very close, it is essential that adequate spectrum be found to support UA operations including the spectrum requirements for UA sense and avoid (S&A) systems.
ITU-R REPORT M.2204-2010 history
2010ITU-R REPORT M.2204-2010 Characteristics and spectrum considerations for sense and avoid systems use on unmanned aircraft systems