{"title":"Effect of thunderclouds on space wave propagation at 10 GHz","authors":"V. Ramachandran, N. Nand, R. Northcott","doi":"10.1071/SP01009","DOIUrl":null,"url":null,"abstract":"power output of 20 mW. A horn antenna (23 cm x 18 cm) was used at the transmitting end and a dish antenna (64 cm diameter) was used at the receiving end. The dish had a reflex waveguide feed. Behind the dish was mounted a Low Noise Broadband (LNB) converter, and the entire assembly could be rotated in the horizontal plane for the purpose of alignment. The LNB was connected to ICOM-R7100 receiver. The receiver was operated in the wideband FM mode and with the automatic frequency control on. This compensated for any frequency drift in the transmitted frequency. The clear-sky signal-to-noise ratio of the beacon at the receiver was determined by comparing the signal strengths of the ICOM receiver with and without those of the transmitter signal and this was about 26 dB. Measurements were carried out for several days that","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"6 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The South Pacific Journal of Natural and Applied Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1071/SP01009","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
power output of 20 mW. A horn antenna (23 cm x 18 cm) was used at the transmitting end and a dish antenna (64 cm diameter) was used at the receiving end. The dish had a reflex waveguide feed. Behind the dish was mounted a Low Noise Broadband (LNB) converter, and the entire assembly could be rotated in the horizontal plane for the purpose of alignment. The LNB was connected to ICOM-R7100 receiver. The receiver was operated in the wideband FM mode and with the automatic frequency control on. This compensated for any frequency drift in the transmitted frequency. The clear-sky signal-to-noise ratio of the beacon at the receiver was determined by comparing the signal strengths of the ICOM receiver with and without those of the transmitter signal and this was about 26 dB. Measurements were carried out for several days that
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