Fig. 2.From: Mesosphere summer echoes observed with the SuperDARN Hokkaido HF radar at Rikubetsu, Japan (43.5°N)(a) RTI and (b) RTV plots on HF radar beams 0–5, and (c) Doppler velocity maps at 0718 and 0802 JST on 30 June 2009.Back to article page