Using In-Situ Juno Observations to Understand the Radial Evolution of Interplanetary Coronal Mass Ejections.

Interplanetary coronal mass ejections, ICMEs, are the main drivers of space weather at Earth which can have severe effects to systems both in space and on the ground. ICMEs with a strong southward magnetic component are the most geo-effective, thus the strength and orientation of an ICME is important in forecasting space weather severity. Understanding their evolution as they propagate through the heliosphere is therefore essential. Relatively few studies have used multi-spacecraft observations to analyse ICME evolution as radial alignments between spacecraft are rare. While most such recent studies have focused on the inner heliosphere, Juno cruise phase data provides a new opportunity to study ICME evolution beyond 1 AU. We present analysis of ICMEs observed in-situ by both Juno and spacecraft at 1 AU to investigate their evolution as they propagate from the inner heliosphere. Investigation of the sheath region and timing considerations between spacecraft allows for the general shape of the shock front to be reconstructed. Combining in-situ observations and results of fitting techniques to the flux ropes determines the global picture of the ICME as it propagates. Constraining the physical properties of ICME evolution using these techniques is vital in furthering understanding of the chain of evolution from the Sun, to the Earth, and beyond into the outer heliosphere.