Method of generating visual representation of terrain height from SAR data employing multigrid analysis

摘要

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.