The necessity of dogleg maneuvers to achieve sun-synchronous orbits from specific launch sites like Florida follows directly from orbital mechanics and latitude constraints, making it a matter of direct observation and established aerospace engineering principles.
The claim states an orbital mechanics fact regarding launches from Florida (approx. 28.5 degrees North) into sun-synchronous orbits (which require high inclinations, typically around 97-98 degrees). Because Florida's latitude is lower than the required orbital inclination, reaching a sun-synchronous orbit directly via a standard due-east launch is impossible without a plane change or dogleg maneuver (or launching into a supersynchronous transfer, though doglegs are standard to match inclination when range safety or launch azimuth constraints prevent direct insertion). This is a well-established geometrical and physical fact governed by standard orbital mechanics, qualifying it as common knowledge within aerospace contexts.