Dear all,
To do the decomposition and achieve the three-dimensional displacements (EW, NS, UD), we need to have the three observations with different geometries such as the combination of GPS and InSAR results. Could anybody please let me know whether it is reasonable to use the two different descending orbits and just one ascending orbit for the 3D decomposition? In this case, will we have different geometries especially about those descending orbits?
I do really appreciate if you can share any document or paper which let me know my answer.
Sincerely,
Sayyed
Due to the ascending or descending feature you only have displacement in line of sight (LOS).
By combining two orbit, one can achieve 3D displacement, and one orbit can achieve E–W displacement (in LOS). An article is sent for study
Article Resolving Three-Dimensional Surface Motion with InSAR: Const...
Omid Memarian Sorkhabi Thank you so much for sharing that paper. Actually, the main question is whether two descending orbits can play the rules as two different geometries or not?! and then, in a combination with an ascending orbit, we can try to do the 3D decomposition.
With 2 descending images at close time range, it offers a geometry and you need to pair the images in each orbit for 3D displacement. In the specific case, you can combine a pair of images with a 3D GPS displacement.
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