I’m a little late to this question but that one cable does look a little strange being wider at one end. Mainly because non of the others are. Typically cable doesn’t bulge like that but then again most cables aren’t 50’ around or however big they are supposed to be.
In case you haven’t thought of this. One thing that would help establishing a size reference would be to put lots of other items on the cables themselves. Monitoring equipment, or in the case of these monitoring stations. Most companies with items that take up large amounts of real estate have them perform other actions as well. It’s not uncommon to see a process unit with weather tracking equipment or security cameras stapped on the side.
Might be a little early to think about that now.