IONOGRAMS WITH SCALED CHARACTERISTICS (Lowell Sounders)
Dourbes /
Wallops Is. /
Millstone Hill
Gakona
Chilton /
Lerwick /
Port Stanley
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IONOGRAMS WITHOUT SCALED CHARACTERISTICS
Tromso
Uppsala /
Kiruna /
Lycksele
Okinawa /
Kokubunji /
Wakkanai /
Yamagawa
Christchurch
Bear Lake
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