Here is a good flightradar24 video demonstration by Mick West of how to filter out aircraft that are too low to form aviaticus clouds. When forecasting aviaticus cloud events it is essential to know your local air traffic pattern to determine the time of day when these clouds could form, when the conditions are right, i.e. your area is covered by a boundary sheet.
Below is another interesting tutorial about estimating the distances of visible aerotrails up to 200 mikes away.
After learning the flight patterns in your area it becomes quite easy to estimate range without any devices or software.
