CME Forecast Verification using combining remote sensing and in situ measurements by Parker Solar Probe and Solar Orbiter observations

In this paper, we present an analysis based on interplanetary coronal mass ejections (ICMEs) detected by Parker Solar Probe (PSP) and/or Solar Orbiter (SolO) during the period 2019 to 2024. These new generation of solar missions provide an unprecedented perspective on solar transients, enabling multi-point observations, and enhancing our understanding of CME evolution and propagation in the interplanetary medium. We identified potential PSP/SolO impacting CMEs reported in CME Scoreboard populated by the Moon-to-Mars (M2M) Space Weather Analysis Office at NASA Goddard Space Flight Center. The team analyzes CME events in real-time and predict arrivals that may have impact to different NASA missions. This CME Scoreboard is available in the Space Weather Database Of Notifications, Knowledge, Information (DONKI) developed at the Community Coordinated Modeling Center (CCMC). For each event reported in the CME Scoreboard, predicted arrival times are cross-checked against in-situ observations from the PSP and/or SolO. This validation is primarily based on solar wind plasma properties and magnetic field parameters to identify the physical arrival of the CMEs. We then identify and link the ICME to its counterpart CME observed by the LASCO-C2/C3 and COR1/2 coronagraphs, also detailing its associated solar source whenever possible.We conduct a statistical analysis of the differences between predicted and observed ICME arrival times. This analysis demonstrates that the M2M real-time predictions show good performance, with a Pearson correlation coefficient of 0.82 between predicted and observed arrival time, and a mean absolute error of 10.1 hrs, while also highlighting areas for improvement to further optimize accuracy.