首页 | 本学科首页   官方微博 | 高级检索  
     


A PROCEDURE FOR DETERMINING AUXILIARY CO-ORDINATION CONTOURS FOR HYDROMETEOR SCATTER INTERFERENCE
Authors:M THURAI  J W F GODDARD  P LUNDBORG
Abstract:For many years, hydrometeor scatter interference has not been considered to be of operational concern in the microwave region despite the large co-ordination areas produced by Appendix 28 of the Radio Regulations and by the ITU-R Recommendations, and despite the experimental evidence of rain scatter that supports the basic propagation models contained in the procedure. The main reason for this is the low probability of exact intersection between the transmitter and the receiver main beams assumed by the intentionally conservative co-ordination procedure. This paper describes a method for deriving additional contours based on avoidance angle, this being the angle of the earth-station away from the azimuth bearing of the terrestrial station. Thus, knowledge of the relevant antenna bearings can lead to the rapid elimination from further consideration of stations where the risk of significant interference is remote. Results for two representative earth stations are presented, which highlight the value of including this procedure in the frequency co-ordination process.
Keywords:hydrometeor scatter interference  auxiliary contours  co-ordination method  avoidance angle
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号