Authors: Alexandre L. Brosius (PSU/NASA GSFC), Jaye L. Verniero (NASA GSFC), Adam Szabo (NASA GSFC)

Parker Solar Probe is allowing us to witness magnetic reconnection in previously unexplored regions of the heliosphere. In addition, new wave analyses of familiar plasma boundary crossings indicate that structure across magnetic discontinuities is more complex than previously thought and can provide signatures of local and nonlocal energy dissipation processes. Minimum variance analysis (MVA) is one of the tools which allows us to refine our understanding of wave geometry contributing to magnetic boundary substructure. MVA characterizes wave geometry using relative component amplitudes. We have developed a novel algorithm, called Minerva, that improves upon traditional MVA by using an adaptive interval size, stringent planarity constraints, and polarization changes. Analyses in near-planetary environments demonstrate that Minerva can provide insights into identification of generalized discontinuity geometries and associated waves. We discuss wave geometry near reconnection events in the heliospheric current sheet.