|
|
|
www.southgatearc.org
|
Impact of Galileo on 1270 MHz Windprofiler RadarsThe European Radiocommunications Office (ERO) have published ECC Report 90 which considers the impact of the Galileo Positioning System on Windprofile Radars which operate between 1270 and 1295 MHz. The report titled "Compatibility of Wind Profiler Radars in the
RLS with the RNSS in the band 1270-1295 MHz" can be seen at The report provides a indication of the potential impact of Galileo, whose E6-signal occupies the entire band from 1260-1300 MHz, on weak signal Amateur operations which take place in the 1260-1270 MHz Amateur Satellite Allocation and at 1296 MHz. The report's conclusions are: 7.1 General conclusions related to RNSS in the 1270-1295 MHz band As far as noise like impact is concerned, it appears that mitigation techniques would be necessary for three-beam WPR whereas five-beam WPRs would be able to operate with minor degradation without applying any mitigation. There are some processing features that could provide interference suppression capabilities. These techniques would however require software and possibly hardware modifications and could hence result in technical and costs consequences that are quite difficult to asses. Finally, it should be noted that the interference analysis were performed using the maximum Galileo power, i.e. representing cases where the WPR central frequency would be close to the maximum of the Galileo spectrum. Measurements have shown that shifting the WPR central frequency close to a Null of the Galileo spectrum would provide, at least for most types of WPR, sufficient interference suppression to ensure coexistence. However, it should be noted that this solution is Galileo system dependent and might not be possible for future RNSS systems. Two frequencies are currently seen as good candidates for WPR operations: 1274 MHz and 1294 MHz. It should, however, be noted that this latter frequency is currently not in the frequency range as given in ITU-R Resolution 217 and could require, if needed, a specific regulatory work prior its implementation. It is also recommended that the WPR manufacturers and operators should liaise with RNSS operators or system developers to establish the most appropriate mitigation technique to apply to WPR perhaps on an individual basis.
|
|
|||||||||||||
|
|
|
