The antenna attachment doesn't seem to do anything at first, until Dirk checks his incoming messages. Each message now has a number next to it formatted as "XXX.X" (for example, 015.7). Based on how the smaller numbers are next to messages from people Dirk knows are nearby, it's a safe bet that this is some kind of distance measurement.

The machine does not stir at all overnight, or at the start of Morning 025.