This directory contains JSON files used by the Plot Walk application for the “step” method. The “step” method allows the user to step through a series of figures without a predefined time range. 

Each file name is defined as: mission-probe ID-plot type.json, with special characters and spaces replaced with underscores. For missions without a probe ID, the probe ID is empty. For example: Cluster-1-Orbits.json for Cluster, probe 1, orbit plots. 

These files contain lists of lists; each item in the list contains a list with 2 elements, [unix time (UTC), path/filename of the image], where the unix time is extracted from the file name. 

These JSON files are updated a few times per week from the master archive file list.