Index: trunk/ppStack/src/ppStackArguments.c
===================================================================
--- trunk/ppStack/src/ppStackArguments.c	(revision 22733)
+++ trunk/ppStack/src/ppStackArguments.c	(revision 23212)
@@ -168,12 +168,15 @@
                       "Play safe with small numbers of pixels to combine?", false);
     psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-radius", 0, "Radius (pixels) for matching sources", NAN);
-    psMetadataAddS32(arguments, PS_LIST_TAIL, "-zp-iter", 0, "Maximum iterations for zero point", 0);
+    psMetadataAddS32(arguments, PS_LIST_TAIL, "-zp-iter-1", 0, "Maximum iterations for zero point; pass 1", 0);
+    psMetadataAddS32(arguments, PS_LIST_TAIL, "-zp-iter-2", 0, "Maximum iterations for zero point; pass 2", 0);
     psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-tol", 0, "Tolerance for zero point iterations", NAN);
     psMetadataAddS32(arguments, PS_LIST_TAIL, "-zp-trans-iter", 0, "Iterations for transparency determination", 0);
     psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-trans-rej", 0, "Rejection threshold for transparency determination", NAN);
     psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-trans-thresh", 0, "Threshold for transparency determination", NAN);
-    psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-star-rej", 0, "Rejection threshold for stars", NAN);
+    psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-star-rej-1", 0, "Rejection threshold for stars; pass 1", NAN);
+    psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-star-rej-2", 0, "Rejection threshold for stars; pass 2", NAN);
     psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-star-limit", 0, "Limit on star rejection fraction for successful iteration", NAN);
-    psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-star-sys", 0, "Estimated systematic error", NAN);
+    psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-star-sys-1", 0, "Estimated systematic error; pass 1", NAN);
+    psMetadataAddF32(arguments, PS_LIST_TAIL, "-zp-star-sys-2", 0, "Estimated systematic error; pass 2", NAN);
     psMetadataAddStr(arguments, PS_LIST_TAIL, "-temp-image", 0, "Suffix for temporary images", NULL);
     psMetadataAddStr(arguments, PS_LIST_TAIL, "-temp-mask", 0, "Suffix for temporary masks", NULL);
@@ -242,12 +245,15 @@
 
     VALUE_ARG_RECIPE_FLOAT("-zp-radius",       "ZP.RADIUS",       F32);
-    VALUE_ARG_RECIPE_INT("-zp-iter",           "ZP.ITER",         S32, 0);
+    VALUE_ARG_RECIPE_INT("-zp-iter-1",         "ZP.ITER.1",       S32, 0);
+    VALUE_ARG_RECIPE_INT("-zp-iter-2",         "ZP.ITER.2",       S32, 0);
     VALUE_ARG_RECIPE_FLOAT("-zp-tol",          "ZP.TOL",          F32);
     VALUE_ARG_RECIPE_INT("-zp-trans-iter",     "ZP.TRANS.ITER",   S32, 0);
     VALUE_ARG_RECIPE_FLOAT("-zp-trans-rej",    "ZP.TRANS.REJ",    F32);
     VALUE_ARG_RECIPE_FLOAT("-zp-trans-thresh", "ZP.TRANS.THRESH", F32);
-    VALUE_ARG_RECIPE_FLOAT("-zp-star-rej",     "ZP.STAR.REJ",     F32);
+    VALUE_ARG_RECIPE_FLOAT("-zp-star-rej-1",   "ZP.STAR.REJ.1",   F32);
+    VALUE_ARG_RECIPE_FLOAT("-zp-star-rej-2",   "ZP.STAR.REJ.2",   F32);
     VALUE_ARG_RECIPE_FLOAT("-zp-star-limit",   "ZP.STAR.LIMIT",   F32);
-    VALUE_ARG_RECIPE_FLOAT("-zp-star-sys",     "ZP.STAR.SYS",     F32);
+    VALUE_ARG_RECIPE_FLOAT("-zp-star-sys-1",   "ZP.STAR.SYS.1",   F32);
+    VALUE_ARG_RECIPE_FLOAT("-zp-star-sys-2",   "ZP.STAR.SYS.2",   F32);
 
     VALUE_ARG_RECIPE_INT("-psf-instances", "PSF.INSTANCES", S32, 0);