MuhammadQaisarAli/GNSSSignalSimGUI ? reverse-engineered prompt

Build me a desktop app for configuring GNSS signal simulations, with a clean tabbed interface that helps a user step through the setup without needing to know much about the underlying simulator.

I want it to let me load ephemeris files, choose a simulation time that matches their validity, set a static or moving trajectory on a map, pick GNSS signals like GPS, GLONASS, Galileo, and BDS, adjust signal power and masks, and choose output options like IF data, KML, NMEA, or RINEX. It should show the generated JSON config live as I edit things, and warn me when something is invalid or out of range.

Please include saving and loading templates, basic app preferences like default folders and logging, and a simple workflow that makes it easy to get from setup to saved configuration. Make it feel polished and practical, and if you need current docs for any library, look them up online first.