Fig. 21From: MF and HF radar techniques for investigating the dynamics and structure of the 50 to 110 km height region: a reviewElectron density profiles by DAE/DPE measurements (full lines, 20:50–21:20 UT, solar zenith angle 106°) and electron density profiles from the in situ radio wave propagation measurements (dashed lines) of the ECOMA-2 flight on September 17, 2006, 21:06 UT. The error bars represent the quartile limits (after Singer et al. 2011)Back to article page