Image Details
Caption: Figure 2.
Spectrograms (top) of the E21 electric field and normalized magnetic field obtained from RPW/TNR measurements and (bottom) background-subtracted time series of magnetic field power spectral density (PSD) at four frequencies. Dashed lines represent the 5σ level of the background variations over the same time period.
© 2026. The Author(s). Published by the American Astronomical Society.