Radio-based Sensing of Turbulent, Ionospheric Flow: A Four-dimensional View

This talk will present the results from combining two new and fundamentally different radio-based methods to obtain electrodynamic and spectral measurements of ionospheric turbulence, using the coherent scatter radar ICEBEAR, as well as a CHAIN GPS receiver.We compare the two-point correlation function of coherent echoes in the auroral E-region (its spectrum) to the power spectrum of amplitude scintillations observed in ground-based GPS receivers.We also compare the apparent motion of radar echo clusters to the plasma drift speed derived from GPS signal analysis.Whereas the two methods rely on completely different signals (one spatial and one temporal), they nevertheless produce consistent velocity readings of the flowing ionospheric plasma, as well consistent spectral measurements of the internal structuring of that turbulent flow.