Phineas and Ferb Porn Story: phineas and ferb
Terra Mesa is a somewhat arid Terra, with the name Mesa, as a possible reference to its geographic features, of course though most Terras to start with are mesas (or plateaus if there is a difference) so that might not hold true.
Terra Mesas squadron is the Interceptors, led by a Sky Knight named Starling. The entire squadron except Starling was killed by Repton (of the Raptors) and it has not been indicated if there is another squadron to replace them.