Communications, Radar & Electronic Warfare (201.. - Index of

210 Communications, Radar and Electronic WarfareFigure 11.10Raw SRTM data, showing collection artifact.artefacts as far as possible although some data voids may still persist after this.Fortunately, the most severe artefacts are visible to the eye when viewed. However,some may remain undetected.The difference between the pre- and post-processed data can be seen by comparingFigure 11.10 to Figure 1 1.11, which shows the same data after having been processedto improve accuracy. The artefacts have now been removed.Apart from space-based collection, aircraft using synthetic aperture radar or LIDAR(Light Detection and Ranging) can collect higher resolution data. Such data can be ofresolution in the range of a few centimetres. However, it is expensive and timeFigure 11.11 Post-processed SRTM data with artefacts removed .. - - -- --- -- --