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Physics and Engineering Physics Colloquium

Wednesday, April 3
2:30 – 3:30 p.m.
Freeman 103
441 East Fordham Road
Bronx, NY 10458
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Professor Lindsay Goodwin, assistant professor in the physics department at the New Jersey Institute of Technology, will present, “Using Radio Science to Understand Sun-Earth Interactions.”

Ionospheric properties impact long-distance radio communication, navigation systems, and power infrastructure. Therefore, it is important to understand the ionosphere to mitigate “space weather.” To provide new insights into the impact of space weather at high latitudes, “irregularity spectra” are developed leveraging: 1) the ability of phased array advanced modular incoherent scatter radars (AMISR) technology to collect volumetric measurements, 2) the slow F-region cross-field plasma diffusion at scales greater than 10 kilometers, and 3) that high-latitude geomagnetic field lines are nearly vertical. The resulting irregularity spectra are of a higher spatial-temporal resolution than has been previously possible with Incoherent scatter radars (ISRs) and capable of resolving approximately 20-kilometer structures in less than two minutes (depending on the radar mode).

Using these spectra, Goodwin has found that ionospheric plasma structures that are tens of kilometers wide will become more dominant near midnight, reflecting the combined role of the solar wind moving plasma in the atmosphere, photoionization, and/or “E-region shorting” breaking down structures. However, by comparing irregularity spectra from high-latitude resolute bay ISR data to solar and magnetospheric conditions, this work resolves statistically the spatial scales associated with different solar and geomagnetic conditions. The results of this work will be discussed during this presentation.

About the Speaker
Lindsay Goodman is a member of the Center for Solar-Terrestrial Research and earned her Ph.D. in physics and engineering physics from the University of Saskatchewan in 2018. She began at NJIT as an assistant professor in 2022. During her tenure at NJIT, she has secured two NSF awards, amounting to a total of $800,000.

This event is open to alumni, faculty/staff, parents, students, and the public.