I need to start learning about the interferometry techniques available/used for remote sensing data (radar or optical).

  • Which are the main applications?
  • Which techniques are applied?
  • Which Earth Observation data is more adequate?
  • Which software (free or comercial) is better?
  • Other important issues.

Help? Thanks.


Can you elaberate more. What are you hoping to do? Can you explain some of the questions you would like to have asked using Remote Sensing? Ie: image classification (what is on the land), change detection (what has changed over a specified time period). Its hard to answer your question without having a more defined scope. The nature of your question makes it easy to say all are good and none are good, as it really depends on what you want to look at.

  • Hi. Thanks. The scope is the monitoring of deformations in a given surface but I'm open to answers in other scopes. – vascobnunes Jun 6 '12 at 14:36
  • Again, can you elaborate. Deformation in what. What are you looking at? Geology, forest cover, ice cover, sand? It depends on what and how you want to look at it. What are you hoping to gain from using Remote Sensing. – Ryan Garnett Jun 6 '12 at 15:47
  • I'm interested in several themes (geology and forestry are on top), but say deformations in an infrastucture. – vascobnunes Jun 6 '12 at 16:41

Optical interferometry is not a remote sensing concept. It is an optics and high-level astronomy concept. Telescopes are limited in resolution relative to the maximum distance between points on their primary mirror (the diameter, conventionally). Interferometer telescope arrays combine the beams of two to six telescope mirrors that are located hundreds of meters away in order to achieve higher resolution than it's possible to construct a telescope mirror for.

In theory it's possible to construct a satellite optical interferometer for earth observation rather than astronomical use, but these things are incredibly hard to build, requiring the mirrors to be precisely located in positions on the order of tens of atoms. I'm aware that the GEOINT community can put to shame anything that NASA's developed, and it would be very useful, but a large interferometer surviving a rocket launch is a tall order, and not really necessary when one has spyplanes.

Interferograms created from Synthetic Aperture Radar are a common source of highly detailed local Digital Elevation Models (DEMs). Unless you're dealing directly with satellite data, you shouldn't have to mess with these concepts, though - you'd just be dealing directly with a DEM.

What are you trying to do?

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