1、QUESTION ITU-R 35-1/5*,*Efficient use of the radio spectrum by radar stationsin the radiodetermination service(1977-1978)The ITU Radiocommunication Assembly,consideringa) that the radio spectrum available for use by the radiodetermination service is limited;b) that the necessary bandwidths of emissi
2、ons from radar stations in the radiodeterminationservice are large compared with emissions from stations in many other services;c) that wherever possible, it is desirable for different radar stations to use the same frequencies;d) that various techniques, including Pulse Recurrence Frequency Discrim
3、ination (PRFD) havebeen used successfully in a number of countries to reduce mutual interference and enable radarstations in close proximity to use the same frequencies;e) that maritime radar stations should be compatible with radar beacons in the maritimeradionavigation service,decides that the fol
4、lowing Questions should be studied1 What economy in spectrum utilization, and improvement in operational performance can beachieved by the use of interference suppression techniques for radar stations?2 What technical characteristics of radar stations should be recommended for internationalapplicati
5、on?3 What radiodetermination services could utilize interference suppression techniqueseffectively?4 What are the limitations on the use of interference suppression techniques?5 What other factors could improve the efficiency of utilization of the frequency spectrum?_* This Question should be brought to the attention of the International Association of LighthouseAuthorities (IALA), the International Civil Aviation Organization (ICAO) and the International MaritimeOrganization (IMO).* Former Question ITU-R 35-1/8.
