Fig. 1.From: Mesosphere summer echoes observed with the SuperDARN Hokkaido HF radar at Rikubetsu, Japan (43.5°N)FOV of the SuperDARN Hokkaido HF radar at Rikubetsu. Ground ranges from the radar site are indicated by solid curves. VHF and MF radars are located at Wakkanai, 260 km northwest of Rikubetsu.Back to article page