Dr. Devin Huyghebaert (UiT The Arctic University of Norway) will deliver a talk on the topic, "Expanding Ionospheric Measurement Capabilities in the Fennoscandia Region Using Radars" in the IAP colloquium on 3rd Nov 2022.
He will talk about the Multiple different interaction processes between radio signals and plasmas and how they can be used by radars to remotely measure the characteristics of the ionosphere. These include reflection of the radar signal from enhanced plasma densities and scattering from perturbations in the ionospheric plasma density. Ionosondes use reflection from the plasma density at varying radar frequencies to obtain bottomside plasma density measurements of the ionosphere. Incoherent and coherent scatter radars scatter from fluctuations in the plasma density, where the fluctuations are proportional to half the radar wavelength for monostatic systems. For Incoherent scatter radars, the collective thermal fluctuations of the plasma are scattered from and a Doppler frequency spectrum is obtained. This spectrum contains details about the characteristics of the plasma, such as the plasma density and temperature. For coherent scatter, significant turbulence in the plasma provides large plasma density fluctuations that can be scattered from. The characteristics of the measured spectra from the scattered signal can provide details about the plasma turbulence processes that are occurring in the region. His presentation will describe recent systems and processing software that are being developed for ionospheric monitoring in the Fennoscandia region using the different remote sounding processes. The systems that will be mentioned in his talk include the Network of Oblique Ionosonde Receivers Experiment (NOIRE, preliminary results in figure), a new multistatic incoherent scatter radar system currently under construction (EISCAT 3D), and the SIMONe Norway meteor radar network modified for E-region coherent scatter measurements.