Index: trunk/psModules/src/astrom/pmAstrometryModel.c
===================================================================
--- trunk/psModules/src/astrom/pmAstrometryModel.c	(revision 41533)
+++ trunk/psModules/src/astrom/pmAstrometryModel.c	(revision 41810)
@@ -525,5 +525,5 @@
 	// as of r40806, psPlaneTransformInvert supplies the extra order (if non-linear)
         psFree (chip->fromFPA);
-        chip->fromFPA = psPlaneTransformInvert(NULL, chip->toFPA, *region, 50, 4);
+        chip->fromFPA = psPlaneTransformInvert(NULL, chip->toFPA, *region, 100, 6);
 
         psFree (region);
@@ -592,5 +592,5 @@
     // as of r40806, psPlaneTransformInvert supplies the extra order (if non-linear)
     psFree (file->fpa->fromTPA);
-    file->fpa->fromTPA = psPlaneTransformInvert(NULL, file->fpa->toTPA, *region, 50, 4);
+    file->fpa->fromTPA = psPlaneTransformInvert(NULL, file->fpa->toTPA, *region, 100, 6);
 
     psFree (model);
@@ -745,5 +745,5 @@
 
     psFree (file->fpa->fromTPA);
-    file->fpa->fromTPA = psPlaneTransformInvert(NULL, file->fpa->toTPA, *region, 50, 4);
+    file->fpa->fromTPA = psPlaneTransformInvert(NULL, file->fpa->toTPA, *region,100, 10);
 
     psFree (region);