[editor-surveyor]

Your total lack of knowledge, coupled with your gullible penchant for repeating what other total ignoramuses spout make you the fool of the month.

High altitude shearing of a contrail would rapidly erase the entire trail, fading it like a sheet, not a dense stripe.

[TXnMA]

I have been reading your posts on this subject, and, IIRC, have refrained from answering you directly. I figured a professional land surveyor would know such basic principles as azimuth, perspective, radius of curvature of the earth, etc. Now, I wonder if you are the kind of "surveyor" who polls old ladies as to the number of Depends they use in a month...

You certainly lack the powers of observation that I have encountered in land surveyors -- and I speak as a pretty fair GIS cartographer (my main retirement "job") who works with them and their products all the time.

That "sharp left 'spur" on the contrail coincides exactly with the point where it transited a high cloud-forming layer -- with shear winds and extra moisture (hence, a narrow stratum of clouds in an otherwise clear sky). If anything,the contrail's density is enhanced in that specific region.

Like most of the "missile" folk, you make no effort to consider ALL the evidence, and just cherry-pick to come up with your "yabbuts". This is a prime example.