Authors: Rachael Filwett (University of Iowa), Joe Fennell (Aerospace Corporation), Bern Blake (Aerospace Corporation), Allison Jaynes (University of Iowa), Drew Turner (APL), Robert Allen (APL)

Using a variety of spacecraft (MMS, ACE, Artemis, Themis, PSP, SolO) we will discuss the mesoscale structures of a few coronal mass ejections (CMEs) that were observed near earth in 2021 and 2022. These CMEs, although weak, and not particularly geoeffective, serve as excellent examples of our ability to use the Heliophysics System Observatory (HSO) in order to understand the multi-scale structures of these structures. We will discuss the magnetic structure and particle spectrum when they are observed by a variety of spacecraft near Earth, and how that structure looks similar/dissimilar. We will use observations both outside and inside the magnetosphere showing that the relative location of the spacecraft and the associated magnetic cloud structure makes a significant difference in the properties observed, even a few earth radii apart.  Even though these spacecraft are spaced relatively close together, at time they can observe very different properties, highlighting the non-uniformity of CMEs and the importance of focusing on their mesoscale properties.