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Fig. 10 | Progress in Earth and Planetary Science

Fig. 10

From: MF and HF radar techniques for investigating the dynamics and structure of the 50 to 110 km height region: a review

Fig. 10

A few hours of SNR for E mode randomly selected for one receiver of the BPMF radar showing layering typical of this type of observation. LT = UT + 9.5 h, and sunrise occurred at 21:05 UT (6.35 am LT). The layer between 60 and 65 km that forms around sunrise is consistent with VLF observations of the “C-layer” described by Bertoni et al. (2013) and mentioned in the text. The layer near 75 km is also commonly observed and is often associated with a “preferred height”

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