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Earthquake, we have developed the mobile vehicle station and fully automatic earth station for WINDS which can be installed by simple operation in a time of disaster.2.1Mobile vehicle earth station for WINDSe mobile vehicle earth station for WINDS is com-posed of an axis symmetric reector antenna of 65 cm opening size with a radome, a solid-state power amplier of 20 W class, a triaxial gimbal mechanism, and a modem. e mobile vehicle earth station is mounted on general vehicles as shown in Table 1 and Fig. 1. Assuming move-ment immediately aer the disaster with the disaster countermeasure organizations such as a re department emergency relief team, this Ka band mobile vehicle earth station can transmit 24 Mbps data while moving at 100 km/h. In addition, as this satellite communication vehicle earth station is unprecedented in the world, it is technology for which the re departments and defense bodies concerned have great expectations.2.2Fully automatic earth stationAs shown in Table 2 and Fig. 2, the fully automatic earth station is composed of an oset-type reector an-tenna of 100 cm, an antenna feeding part, an antenna pedestal which doubles as a storage box, and a modem. e 75 W of TWTA and the LNA are integrally imple-mented in the antenna feeding part, and the fully auto-matic portable earth station has a structure which enables it to be easily assembled without tools. In addition, the GPS receiver and GPS compass mounted on the antenna enables automatic satellite-capture, and as the local station position is automatically input, the initial setting for the earth sta-tion is automated.FiF2 Fully automatic earth stationTabT2 Specifications of fully automatic earth stationTx frequency27.5 to 28.6 GHzRx frequency17.7 to 18.8 GHzPolarizationLinear (H/V)Antenna1.0 m parabolaHPA75 W TWTADrive rangeEl: 15-75 degs.Az: +/- 95 degs.Data rateWINDS regenerative transponder Tx: 1.5, 6, 24, 51 Mbps Rx: 155 MbpsUse interfaceEthernet (1000 base-T)TabT1 Specifications of mobile vehicle earth station for WINDSTx frequency27.5 to 28.6 GHzRx frequency17.7 to 18.8 GHzPolarizationLinear (H/V)Antenna65 cm Ringfocus AntennaHPA20 W SSPADrive rangeEl: 20 to 160 degs.Az: UnlimitedTracking accuracy< +/- 0.2 deg.Data rateWINDS regenerative transponder Tx: 1.5, 6, 24 Mbps Rx: 155 MbpsUse interfaceEthernet (1000 base-T)Others- Equipped with an engine generator (2.8 kVA or more)- Antenna can be mounted on seacraftFiF1 Mobile vehicle earth station for WINDS3 Ultra-High-Speed Satellite Communication Technology88 Journal of the National Institute of Information and Communications Technology Vol. 64 No. 2 (2017)
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