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residual carrier was measured at NICT Kashima Space Technology Center, NICT Headquarters (Koganei), and NICT Okinawa Electromagnetic Wave Technology Center.Figure 19 shows an example of the results of the mea-surements conducted at Kashima Space Technology Center of the WINDS network information signal residual carrier level, along with 1 minute of rainfall.Figures 20 and 21 show the correlation of rain attenu-ation and rainfall, and the correlation of rain attenuation and rain attenuation variation rate obtained in Kashima from 2009 to 2017. By considering the MBA 1.2 m VSAT uplink rain attenuation compensation is 26.7 dB, and the ratio of the rain attenuation in a 28 GHz band uplink and the rain attenuation in an 18 GHz band downlink is about 2, the attenuation due to “heavy rain” of up to about 50 mm/hour is expected to compensate in Kashima. On the other hand, the control response speed is one of the FiF20　Rain attenuation versus Rainfall (Kashima)FiF21Rain attenuation variation rate versus rain attenuation (Kashima)FiF19An example of rain attenuation measurements using WINDS net information signal residual carrier (Kashima, September 11, 2015)LNCAntennaReceive SignalInserterData GatheringPCBeaconSignalSpectrumAnalyzerOutdoorIndoorFiF18WINDS network information signal residual carrier measurement systemFiF16An example of rain attenuation measurement using TDMA RB (Kashima, April 14, 2009)FiF17　Time domain enlarged graph of Fig. 16853-2 Experiment Report for Rain Attenuation Compensation