|Natural environment of Lake Biwa|
|Monthly temperature of the Lake Biwa are 28°C in July and August, 4°C in January and February. It rains more than 150 mm/month throught March to July. It winds 5 to 15 m/s on shore of the lake. The winds are very different at the measured spots at the same time. Its surface elevation is 85 m.|
|Regulation of Japan|
Japan has more allowable aviation law for RC aircraft than United States. RC aircraft cannot fly over 150 m in Japan. But Japan has much severe regulation about elecromagnetic waves than US FCC.
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