I'm running the "Device Uptime: Uptime by Device" report against some APs, and the 4th column in the report is titled "Device Uptime" and shows as a %. How exactly is this calculated, or what is it showing a % of? It certainly cannot be % of the report period the AP was online - or else I have a reporting error.
For example, I ran a report against an AP over a time period of a month, and it shows 75.99% for Device Uptime. This AP is on a shuttle bus, and only powers up during daytime hours (not even fully 8a-5p), and only weekdays generally. (when the bus is parked overnight and turned off - the AP gets no power). What I'm getting at is there is no way this AP is "up" 75% of the 30 days report window.