1、QUESTION ITU-R 240/5*Technical and operational characteristics and spectrum requirements of high-frequency surface wave radar systems operating in thefrequency range 3 to 50 MHz*(2007)The ITU Radiocommunication Assembly,consideringa) that there is a need to operate high-frequency ocean observing rad
2、ar systems, in theradiodetermination service, using spectrum in the 3 to 50 MHz frequency range;b) that high-frequency surface wave radar systems have been operated in the 3 to 50 MHzrange on an experimental basis for many years, and there is global interest in deploying operationalsystems on a worl
3、dwide basis;c) that low-power high-frequency surface wave radar systems include: measurement of sea state and ocean currents for oceanographic, climatological andmeteorological operations; and maritime domain awareness beyond the range of detection of microwave radars, providingsafety, tracking of s
4、urface vessels and aircraft and security of shipping and ports;d) that performance and data requirements dictate the operational characteristics that can beused by high-frequency surface wave ocean observing radar systems;e) that there is possibly a need for several frequency bands spread across the
5、 3 to 50 MHzrange,decides that the following Questions should be studied1 What are the technical and operational characteristics of high-frequency surface wave radarsystems operating in sub-bands in the frequency range 3 to 50 MHz?2 What are the frequency bands most suitable, within 3 to 50 MHz, for
6、 operation of high-frequency surface wave radar systems, taking into account frequency dependent properties requiredfor operation, and possible sharing issues with allocated radio services?3 What techniques can be used by high-frequency surface wave radar systems to make themost efficient use of the
7、 spectrum and mitigate interference to existing services?further decides1 that the results of the above studies should be included in one or more Recommendations orReports;2 that the above studies should be completed by 2009.Category: S2_* Former Question ITU-R 240/8.* This Question should be brought to the attention of the International Maritime Organization (IMO), theWorld Meteorological Organization (WMO) and ITU-R Study Groups 6, 7 and 9.
