Index: trunk/ppSub/src/ppSubArguments.c
===================================================================
--- trunk/ppSub/src/ppSubArguments.c	(revision 14629)
+++ trunk/ppSub/src/ppSubArguments.c	(revision 14673)
@@ -199,4 +199,10 @@
     psMetadataAddBool(arguments,  PS_LIST_TAIL, "-generate-mask", 0, "Generate mask if not supplied?", false);
     psMetadataAddStr(arguments,  PS_LIST_TAIL, "-stamps", 0, "Stamps filename; file has x,y on each line", NULL);
+    psMetadataAddBool(arguments, PS_LIST_TAIL, "-opt", 0, "Derive optimum parameters for ISIS kernels?", false);
+    psMetadataAddF32(arguments, PS_LIST_TAIL, "-opt-min", 0, "Minimum value for optimum kernel search", NAN);
+    psMetadataAddF32(arguments, PS_LIST_TAIL, "-opt-max", 0, "Minimum value for optimum kernel search", NAN);
+    psMetadataAddF32(arguments, PS_LIST_TAIL, "-opt-step", 0, "Step value for optimum kernel search", NAN);
+    psMetadataAddF32(arguments, PS_LIST_TAIL, "-opt-tol", 0, "Tolerance for optimum kernel search", NAN);
+    psMetadataAddS32(arguments, PS_LIST_TAIL, "-opt-order", 0, "Maximum order for optimum kernel search", -1);
 
     if (argc == 1 || !psArgumentParse(arguments, &argc, argv) || argc != 4) {
@@ -260,4 +266,14 @@
     }
 
+    if (psMetadataLookupBool(NULL, arguments, "-opt") || psMetadataLookupBool(NULL, recipe, "OPTIMUM")) {
+        psMetadataAddBool(config->arguments, PS_LIST_TAIL, "OPTIMUM", 0,
+                          "Derive optimum parameters for ISIS kernels?", true);
+        VALUE_ARG_RECIPE_FLOAT("-opt-min", "OPTIMUM.MIN",   F32);
+        VALUE_ARG_RECIPE_FLOAT("-opt-max", "OPTIMUM.MAX",   F32);
+        VALUE_ARG_RECIPE_FLOAT("-opt-step","OPTIMUM.STEP",  F32);
+        VALUE_ARG_RECIPE_FLOAT("-opt-tol", "OPTIMUM.TOL",   F32);
+        VALUE_ARG_RECIPE_INT("-opt-order", "OPTIMUM.ORDER", S32, -1);
+    }
+
     psMetadataAddBool(config->arguments, PS_LIST_TAIL, "REVERSE", 0, "Reverse sense of subtraction",
                       psMetadataLookupBool(NULL, arguments, "-reverse"));