Perhaps the output could instead of just being "[System Sector] <Name> Message" be changed so that:
1: When you're in a station, the Sector variable changes to the name of the station.
ex: [Itan, Armand's Reward] <Miharu> This is a test.
2: When you're in a sector (and not in a station) that is labeled as being over/by a planet, the planet's name precedes the sector.
ex: [Sol II, Serco Prime H-13] <Icarus> Sucker!
3: When you're in a sector (and not in a station) that is labeled as being in an asteroid field, the asteroid field's name precedes the sector.
ex: [Dau, Aroan Asteroid Field K-10] <Sage> arrr?
4: Condition 2 overrides Condition 3.

Too wordy. Actually, I think our current system is too wordy. THere's more space for the locator than there is for the message half the time anyhow.

This would be more realistic.

But much less utile.

I think that it's a good idea, but it adds too much clutter.