To download a 10.9meg 640x480 simulation of a flyby and landing.
Download 640x460 flyby simulation.

To learn more about the fascinating technology behind IFSAR great illustrated reports can be found on line.
IFSAR, APPLICATIONS TO CRISIS SUPPORT
IFSAR, Shuttle Radar Topography Mission

All images shown below were created with data sets extracted, corrected and processed with programs presar and pcalrb.

The image shows the sar map of the area used to create the simulated flyby. The APG-76 MMRS radar created the data used to create the the 3D IFSAR image.

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Snapshots of the flyby simulation.

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InterFerometric Synthetic Aperture Radar (IFSAR) is basically a SAR with a second antenna. Very simply explained, use of a second antenna is similar to using binoculars versus a telescope, one can perceive depth by using both eyes rather than one. IFSAR is based on collecting imagery (echoes) from the same scene using two spatially separated points (antennas) from which an interferogram can be formed and used to determine height, hence the added name "interferometric" SAR. Through phase unwrapping (on a computer) of the return radar signal(s), two images can be resolved and used to differentiate height and subsequently build a 3-D map.

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This IFSAR image of the Glastonbury CT area is a stitched swath map and the Aberdeen IFSAR images below represent a wide area map of SEVERAL swathes. The Aberdeen map is also show with true photos of the area showing how the colonization of the image brings out elevation features. The truly awesome way to see these images is with a SGI indy with Crystal EYES Glasses.

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