Bill and I visited s15 this afternoon to look into the gsoil not reporting. Reseating the cables didn't help, so ended up replacing the gsoil (probe + board). The original one was left in place to avoid disturbing the plot, with the open connector taped over.
At the site we also noticed that 2 out of the 3 external guy wires were dangling loose, with the turnbuckles completely apart. Evidently the lock nuts on the turnbuckles weren't enough to keep them in place. We re-tensioned the guy wires and added zip ties to keep them in place. The lightning spike had also fallen off the top of the tower and was lying on the ground. We didn't have mast lowering supplies so we left it at the base of the tower for a future visit.
No cats today, alas.