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Fig. 7 | Earth, Planets and Space

Fig. 7

From: Statistical study of PMSE response to HF heating in two altitude regions

Fig. 7

Panels 1 and 2 show the enhanced electron temperature (Te) and PMSE modulation index (MI), respectively, for corresponding heating cycles of case 1. The percentage shown in panel 1 corresponds to number of cycles where Te > 500 K, while in panel 2 corresponds to number of cycles where PMSE modulation index, MI > 50%. The asterisks represent the measurements at transmitter frequency 5.423 MHz, whereas the circles represent the measurements at 7.953 MHz. The vertical dash line is used to separate the measurements of X- and O-modes polarization

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