In this tutorial, Nik shows how to remove the satellite trails which are commonly seen in astronomical images. This valuable technique is an alternative to the common way of removing satellite trails that involves the stacking of several images using pixel rejection techniques, such as sigma-clipping. As sigma-clipping requires at least three frames per filter, this new technique explained by Nik in this tutorial is specifically valuable for One-Click Observations, where you often have only two images per filter.