Rugged

A sensor-to-terrain mapping tool

Rugged is a free java library for geolocation and used for satellite imagery.

Rugged is an add-on for Orekit handling Digital Elevation Models contribution to line of sight computation. It is a free software intermediate-level library written in Java.

It mainly provides direct and inverse location, i.e. it allows to compute accurately which ground point is looked at from a specific pixel in a spacecraft instrument, and conversely which pixel will see a specified ground point. This mapping between ground and sensor is computed with a viewing model taking into account:

• ground Digital Elevation Model (DEM),
• Earth rotation will all its tiny irregularities,
• on-board sensor pixels individual line-of-sights,
• spacecraft motion and attitude,
• several physical effects.

Direct and inverse location can be used to perform full ortho-rectification of images and correlation between sensors observing the same area.

Homepage: www.orekit.org/rugged/