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The Geomage Surface Consistent Statics Solver EXT is the second stage in the two-step Geomage surface-consistent statics workflow for 2D CMP seismic data. It reads the cross-correlation data file produced by the Geomage Surface Consistent Statics EXT (search stage) module and solves the surface-consistent decomposition problem to separate the measured trace time shifts into independent per-source and per-receiver static correction values.
The module iteratively minimises the misfit between the observed inter-trace time shifts and the sum of source and receiver statics using the SolveStaticEXT algorithm. Iteration continues until either the specified number of iterations is reached or the residual error falls below the convergence threshold. The resulting corrections are output as a surface-consistent static correction dataset that can be applied to the seismic traces in a subsequent processing step.
Note: This module is deprecated. It is retained for compatibility with legacy processing projects. For new projects, use the current surface-consistent statics workflow available in g-Platform.
The indexed collection of 2D CMP gathers that was processed by the search stage. This item carries the geometry information — source and receiver point locations and sequence numbers — that the solver uses to assign computed static values back to individual surface points. The input dataset must be organised as 2D CMP gathers; 3D or non-CMP datasets are not supported.
The maximum number of iterations the solver will perform during the decomposition. Default value is 100, with a minimum of 1. Each iteration refines the estimates of source and receiver static corrections by minimising the remaining misfit. Increasing the iteration count improves the accuracy of the decomposition but increases computation time. For most datasets, 50 to 150 iterations are sufficient. If the solution converges before reaching this limit (as controlled by the Threshold criteria), the solver stops early.
Selects the decomposition algorithm variant used by the solver. Default value is 2. Different values activate different internal solving strategies for distributing the measured time shifts between source and receiver components. Use the default value unless you have specific guidance from Geomage technical support, as this setting affects the internal weighting scheme applied during the surface-consistent decomposition.
The convergence threshold expressed as a percentage (%). Default value is 30%, with a valid range of 0 to 100. When the relative reduction in the residual error between iterations falls below this threshold, the solver considers the solution converged and stops iterating before reaching the maximum iteration count. A lower threshold requires a tighter fit and may need more iterations; a higher threshold allows early termination with a less refined solution. Setting this value to 0 forces the solver to always complete the full number of iterations specified by SolverIterCount.
The full path and filename of the binary cross-correlation data file (.dat) produced by the preceding Geomage Surface Consistent Statics EXT search module. This file contains the pre-computed inter-trace time shift measurements across all iterations of the search stage. The solver reads this file at the start of execution — it does not perform any cross-correlation itself. Ensure that the path points to the same file that was written by the search module for the same dataset. The file must exist and be readable before running this module.