Authors: Dylan Conner (WVU), Katherine Goodrich (WVU), David Malaspina (University of Colorado), Harriet George (LASP), John W Bonnell (UC Berkeley), Roberto Livi (SSL, Berkeley), Shannon Curry (SSL, Berkeley), Davin E Larson (SSL, Berkeley), Phyllis Whittlesey (SSL, Berkeley), Yingjuan Ma (UCLA), Michael Stevens (Smithsonian Astrophysical Observatory, Harvard), Justin Bowman (WVU), Justin Riggs (WVU)

Parker Solar Probe (PSP), while undergoing gravity assist maneuvers with Venus, obtains multiple measurements of plasma in near-Venus space, including differential voltages, ion velocities, and magnetic fields. With this observational data, we can calculate DC vector electric fields within the induced Venusian magnetosphere. However, due to instrumental characteristics necessary for PSP to observe near the Sun, accurate calibration of these near-Venus DC electric fields becomes difficult. In this work, we seek to determine the DC electric fields calibration by comparing DC electric field observations with observations of -v x B, for plasma flow (v) and magnetic field (B). We present an analysis of uncertainty for each of the two PSP ion velocity measurements, as well as a comparison to MHD simulation data for the first gravity assist. Through comprehensive studies of these sources of uncertainty, we decide an appropriate ion velocity to use for the calibration method itself. The calibrated data can then provide a novel look at quasi-static electric field structure, within the induced Venusian magnetosphere.