Overview

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, Earth rotation will all its tiny irregularities, on-board sensor pixels individual line-of-sights, spacecraft motion and attitude and 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.

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