for spurt, override the interferogram_network configuration

src/dolphin/workflows/config/_displacement.py

@@ -27,7 +27,7 @@
     WorkflowBase,
     _read_file_list_or_glob,
 )
-from ._unwrap_options import UnwrapOptions
+from ._unwrap_options import UnwrapMethod, UnwrapOptions
 
 __all__ = [
     "DisplacementWorkflow",
@@ -246,3 +246,10 @@ def model_post_init(self, __context: Any) -> None:
         self.timeseries_options._velocity_file = (
             work_dir / self.timeseries_options._velocity_file
         )
+
+        # Modify interferogram options if using spurt for 3d unwrapping,
+        # which only does nearest-3 interferograms
+        if self.unwrap_options.unwrap_method == UnwrapMethod.SPURT:
+            logger.info("Using spurt: forming nearest-3 interferograms.")
+            self.interferogram_network.reference_idx = None
+            self.interferogram_network.max_bandwidth = 3