Fig. 3From: Simultaneous observations of equatorial plasma bubbles with an all-sky airglow imager and a HF Doppler sounding system in Taiwan630.0 nm airglow images obtained by the LASC imager in Tainan for three cases of OSS, (a–d) for Event 1, (e–h) for Event 2, and (i–l) for Event 3. The airglow images have been mapped onto the geographic coordinate system by assuming the emission altitude of 250 kmBack to article page