1、QUESTION ITU-R 246/7 Future bandwidth requirements for the space research service (deep space) (2009) The ITU Radiocommunication Assembly, considering a) that there will be continuous growth in the number of deep-space missions and in bandwidth requirements per mission in the future, as a result of
2、the application of new higher data rate technologies; b) that development of large arrays of antennas on Earth and of higher power transmitters on board may enable a single mission to increase its data rate requirement by two orders of magnitude; c) that, consequently, total spectrum requirements fo
3、r deep-space research in the foreseeable future may exceed the total spectrum that is currently allocated for deep-space research; d) that frequency and bandwidth availability affect the performance of a telecommunication link; e) that many factors affect the selection of a technically-preferred fre
4、quency band, including propagation characteristics, technology maturity, availability of ground and space segment equipment, and interference environment; f) that wideband signals in deep-space research carrying high-rate science data around 100 Mbps or higher may require a less stringent interferen
5、ce criterion than those protecting deep-space downlinks in the existing allocations, decides that the following Questions should be studied 1 What is the total bandwidth required for deep-space research missions through the year 2030? 2 How does the total bandwidth requirement identified in decides
6、1 compare with the currently allocated total bandwidth for deep-space research? 3 Can the existing space research service allocations support the requirements identified in decides 2? 4 What are the interference criteria required for wideband deep-space downlinks (space-to-Earth)? 5 What are the gen
7、eral constraints on sharing with other services and their systems that may be imposed by the telecommunication characteristics of the new deep-space wideband systems? 6 What are the bandwidth requirements for the related uplinks (Earth-to-space)? further decides 1 that the results of the above studies be included in one or more Recommendations or Reports; 2 that the studies should be completed by 2012. Category: S2
