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3Development of application using WINDS and demonstration experiment for disaster countermeasures3.1Developing the detection and transmission system of the road bump using the mobile vehicle earth stationIf a disaster occurs, as it is dicult to make an initial response only with the response capabilities by re depart-ments and the police, support organizations are dispatched from all over Japan. Important information at that time is road damage information (locations, road bump height, and road bump length). When the 2011 Great East Japan Earthquake occurred, the Ministry of Land, Infrastructure and Transport checked the damage situations using heli-copters for disaster safety, etc. But as the information collection by helicopters for disaster safety and the human wave tactics by sta had limitations, less than 70 percent or so of the national roads in six prefectures in Tohoku which could be checked as of the night of the disaster day [3] — for this reason, Ehime Prefecture, etc. built a system which collects road damage information using private voluntary organizations and HAM radios.In the case of the Niigata Chuetsu Earthquake in 2004, a rst support team of a re department entered an af-fected area within almost ve hours [4], and in the case of the 2011 Great East Japan Earthquake, a support team also entered an aected area in the same time [1]. But road damage information had not been completely obtained in this time period. For this reason, we have developed a road bump detection system which detects road damage infor-mation, especially step information, by placing acceleration sensors and a camera on a mobile vehicle earth station, assuming that the system moves together with a re depart-ment emergency relief team or an emergency oce and which can send the detected road damage information to the disaster countermeasures oce through WINDS, so that more rapid response becomes possible.3.1.1 Overview of the systemis system is composed of a PC for measurement (hereinaer called “PC in vehicle”), installed on a vehicle for a mobile vehicle earth station, and a Server for road damage information browsing (hereinaer called “Server for disaster countermeasure headquarters”), placed in the disaster countermeasure headquarters. e PC in vehicle connects to the acceleration sensor 1 with GPS, 3 DM-GX3-35 made by MicroStrain, the acceleration sensor 2, 3 DM-GX3-25 made by MicroStrain, and the USB camera, HD PRO WEBCAM C920 R made by Logicool. e ac-celeration sensor 1 is placed on the body side near the shock absorber of the front wheel of the vehicle for the mobile vehicle earth station, and the acceleration sensor 2 is placed on the body side near the shock absorber of the rear wheel. e USB camera is placed on the dashboard, and the PC in vehicle connects to IDU by LAN cable.e PC in vehicle detects the road bump and sends the detected data, and the server for disaster countermeasure headquarters receives the road bump data from the mobile vehicle earth station in real time.Figure 3 shows the conguration of the detection and transmission system of the road bump using the mobile vehicle earth station.3.1.2 Detecting the road bumpis system uses the Yagi method that places the ac-celeration sensors on vehicle body sides at the heads of the suspension and detects the amplitudes [mm] of the up-and-down motions using the acceleration data [m/s2] gained from the sensors [5]. is system calculates the bump height [mm], which is the dierence between the small position and the large position of the up-and-down motion width, and the bump length [mm], which is the distance traveled. In addition, the system is also capable of detecting waviness components that do not aect traveling performance of the vehicle.Figure 4 shows a screenshot of the Server for disaster countermeasure headquarters and the screenshot displays a map on the le side and a list of received data on the right side. e received data displays the latitude/longitude FiF3　System configurationPC installed on the mobile vehicle earth station USB camera Acceleration sensor (with GPS) Acceleration sensor(without GPS)System configuration 893-3 Development and Demonstration Experiments on Satellite Communication Effective for Disaster Countermeasures