What your antenna earns
Until today there were no achievements for feeding the network. Not for ADS-B, not for AIS. That was not an oversight so much as a structural gap: every achievement in the game is handed out at the moment a person does something, from the same function that pays the XP for a catch. A receiver earns while its owner is asleep, so there was nowhere for it to hook in.
Six new ones now exist, in two parallel ladders. Sky: days fed, distinct aircraft heard, aircraft nobody else in the network heard. Water: the same three for vessels. A site with both antennas collects both ladders instead of one blended number, and the XP goes into the single career spine, as it does for everything else.
Two things we changed from the sketch
The original design had a range branch on the sky side, rewarding how far your receiver reaches. We dropped it. Range needs the antenna's coordinates, and entering coordinates is optional on purpose. Three of the eight live stations have none. The Signal score already refuses to score range for the same reason, in a comment that says a score which quietly pays for giving up privacy is lying about being optional. A reward is the same thing as a score. The third branch is solo instead, which needs no location and mirrors the water side exactly.
The sketch also said both bands should share thresholds. They don't. The busiest sky station has heard 4,961 distinct airframes in six days; the one ship station has heard 283 hulls in two. A shared number would park a perfect AIS receiver on tier one forever, which is the mistake the Signal ceilings were built to avoid. Same structure, different numbers.
Two receivers on one roof
If you run more than one, the counts union rather than add. One aircraft heard by both of your antennas is one aircraft. On live data that matters: the owner of the two Hamburg-area stations would score 5,051 by a sum and 4,258 by a union, so 793 aircraft would have been counted twice.
How it fires
A sweep reads the daily rows every six hours and sets the counters. They only ever move upward, so a second sweep on the same day changes nothing, and taking a station offline cannot retract a tier you already earned. The sweep deliberately skips the daily missions and the streak: those are a player's daily loop with their own payout, and closing one because a box on a roof kept working overnight would hand the day's reward to somebody who was asleep.