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 > A sensor-to-terrain mapping tool
 
-[Rugged](www.orekit.org/rugged/  "Rugged homepage") is a free java library for geolocation and used for satellite imagery.
+[Rugged](https://www.orekit.org/rugged/  "Rugged homepage") is a free java library for geolocation and used for satellite imagery.
 
 Rugged is an add-on for [Orekit](https://www.orekit.org/ "Orekit homepage") handling Digital Elevation Models contribution to line of sight computation. It is a free software intermediate-level library written in Java.