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[1]. 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[2]. Its surface elevation is 85 m[3].
 Regulation of Japan
Japan has more allowable aviation law for RC aircraft than United States. RC aircraft cannot fly over 150 m in Japan[4]. But Japan has much severe regulation about elecromagnetic waves than US FCC[5][6].

[1] Biwa-ko Hakubutukan Kisyo Data
[2] BiwakoDas Calendar
[3] Lake Biwa
[4] Koku-hou
[5] Denpa-hou
[6] KitePlaneApplication.pdf in Japanese

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