chem trails... from a true skeptic

Perth Airport this morning about 9am. Cool clear skies. Plane travelling north to south with intense well defined contrails. No wind because they took ages to dissipate. Contrails began fairly high and ended abruptly. Looked strange enough to have many people commenting. The plane didn't take off from Perth nor land there.

Two and half hours later. Same flight path. Another contrail. Same direction. Contrail started at a specific point and ended at a specific point.

My iphone has an app. flightradar24. All aircraft in controlled airspace broadcast their info and this app shows it was Aerospace Operations flying an Aquila AT01.

But the plane I saw was far bigger.