Method of generating visual representation of terrain height fro

Details Method of generating visual representation of terrain height fro Method of generating visual representation of terrain height fro

1995-10-06

1997-03-04

Lobo, Ian J.

Communications: directive radio wave systems and devices (e.g.,

Synthetic aperture radar

342191, G01S 1390

Patent

active

056084056

ABSTRACT:
In a method of recovering data representing terrain height from a synthetic aperture radar system the phase data is unwrapped by a Gauss-Seidel relaxation technique applied to a least squares differential equation in a multigrid algorithm. In the multigrid algorithm the problem represented by the least squares equation is transferred to successively coarser grids to more quickly remove the low frequency components of error. The resulting interim solutions determined on the coarser grids are then transferred successively back to the finer grids to converge on the finest grid of the grid array.

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M. D. Pritt, "Algorithm for Two-Dimensional Phase Unwrapping Using Fast Fourier Transforms" IBM TDB vol. 37, No. 03, Mar. 1994, pp. 441-442.
Ghiglia, "Robust Two-Dimensional Weighted and Unweighted Phase Unwrapping That Uses Fast Transforms and Iterative Methods", Journal of Optical Society of America, vol. 11, No. 1, Jan. 1994, pp. 107-117.

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