These are changes, not sightings. §07 has the gateway
report arrivals and departures; a beacon that stays put produces no message at
all, so an empty stretch here means nothing moved. The periodic snapshot is
what refreshes a stationary beacon, every snapshot_h
hours.
A beacon also reports no position. The positions below are the
gateway's, at the nearest fix it had — the last column says how far from the
event that fix was taken.
Level reported by the beacon99 to 101
% across 16h 39m, 4 samples
§13 tells a flat beacon cell from a departed asset using
this. A level that fell to nothing before the beacon vanished is the first
reading, not the second.