The National Institute of Information and Communications Technology (NICT) of Japan has performed communications propagation measurements between the Wideband InterNetworking engineering test and Demonstration Satellite (WINDS, also known as “KIZUNA”) and a moving vehicle earth station. With a focus on the future occurrences of a Nankai Trough earthquake and an associated giant tsunami, regions with a higher disaster risk have been selected for extensive study. Shadowing has been shown to have a large impact on satellite communications due to the use of a directional Ka-band antenna with high rectilinearity. The influence of shadowing is dependent on the seasons, as the conditions of the leaves vary by season for different types of trees. Therefore, in a previous study, we measured the attenuation of a received signal from the satellite throughout the year with shadowing from several types of trees to examine seasonal differences. The results of our year-long investigation revealed seasonal fluctuations in the received power beneath deciduous trees but no such variations beneath evergreen trees. In this chapter, we present the results of the measured user datagram protocol (UDP) throughput for Ka-band satellite communication.
Experimental results of seasonal vegetation changes on data transmission for Ka-band mobile satellite communication, Page 1 of 2
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