Aerospace vehicle system and method of operation

An aerospace vehicle comprising a pressure vessel, the pressure vessel defining a pressure vessel interior, the pressure vessel comprising:

• a structural frame comprising a frame interior surface that bounds the pressure vessel interior, wherein:
• the structural frame substantially defines a reference surface that encloses the frame interior surface;
• the reference surface is a convex closed surface of revolution about a central axis;
• the reference surface defines a surface diameter equal to twice a maximum distance from the central axis to the reference surface;
• a meridian of the reference surface intersects the central axis at a first point and a second point;
• the reference surface defines a surface height along the central axis between the first and second points, wherein the surface height is substantially less than the surface diameter;
• the reference surface defines a meridian length along a meridian of the reference surface between the first and second points;
• the structural frame further comprises a set of meridional members, the set comprising a first meridional member and a second meridional member;
• and
• the structural frame defines a first aperture, wherein the first and second meridional members cooperatively define a first aperture boundary;
• and
• a set of windows, comprising a first window arranged at the first aperture and attached to the structural frame at the first aperture boundary, the first window comprising a first window interior surface that bounds the pressure vessel interior;
• wherein:
• the first window interior surface extends outside the reference surface;
• and
• the first window defines a meridional window length along the first window interior surface, wherein the meridional window length is greater than 20% of the meridian length;
• and
• the pressure vessel fluidly isolates the pressure vessel interior from an environment surrounding the pressure vessel.