1、QUESTION ITU-R 235/5*, *Protection criteria for aeronautical and maritime systems(2004)The ITU Radiocommunication Assembly,consideringa) that the radio spectrum is a limited resource;b) that with a continued increase in demand for spectrum there is a requirement to identifypossible sharing opportuni
2、ties and carry out the relevant sharing studies;c) that in order to carry out sharing studies protection criteria for existing and future plannedsystems need to be known, but for a number of aeronautical and maritime systems there are norelevant Recommendations that give protection criteria;d) that
3、aeronautical and maritime systems often provide safety of life functions,notingthat an absence of protection criteria may significantly delay sharing studies,decides that the following Question should be studied1 What are the technical and operational characteristics and the required protection crit
4、eriafor those aeronautical mobile and radiodetermination systems for which no Recommendations havealready been established?2 What are the technical and operational characteristics and the required protection criteriafor those maritime mobile and radiodetermination systems for which no Recommendation
5、s havealready been established?further decides1 that the results of the above studies should be included in Recommendations and/orReports;2 that the above studies should be completed by 2007.Category: S2_* This Question should be brought to the attention of the International Civil Aviation Organization (ICAO),International Maritime Organization (IMO), and the International Electrotechnical Commission (IEC).* Former Question ITU-R 235/8.
