Determining ionospheric drift and anisotropy of irregularities from LOFAR core measurements

We take the frozen-in assumption of the scatter evolution and derive simple formulas for characteristics of the spatiotemporal correlation function of the observed diffraction pattern. Using Low-Frequency Array (LOFAR) Cassiopeia intensity observation, we can validate the assumptions qualitatively and compute diffraction pattern velocities for three different geophysical conditions. The results allow us to attribute estimated quantities to ionospheric irregularities.