It is not the generation nor persistence of the trails that interests me, it is that other aircraft, some leaving trails and others not, INVESTIGATE how other previously left trails have deformed.
According to the Bureau of Labor Statistics, as of 2010 writers and authors earned a median salary of $55,420 per year, or $26.64 per hour. These numbers are for freelance writers and authors of books, though, and novelist income is harder to pin down because usually, income depends on book sales and contracts.
Writers employed in the movie and video industries earned a mean annual salary of $106,160 and a mean hourly rate of $51.04 as of May 2013, according to the BLS.