This article describes the causes and behavior of aircraft condensation trails, aircraft radar technology, communication between aircraft and ground control stations, description of the function, analysis and processing of the ADS-B receivers and registers data. It also deals with the design and creation of a suitable web application with a simple user interface and a database for storing and processing this data. The work was based mainly on academical materials and sources, focusing on the issue of condensation trails, ADS-B functionality and programming of web applications.