Index: trunk/psastro/src/psastroArguments.c
===================================================================
--- trunk/psastro/src/psastroArguments.c	(revision 12992)
+++ trunk/psastro/src/psastroArguments.c	(revision 15562)
@@ -36,4 +36,16 @@
         psMetadataAddStr (config->arguments, PS_LIST_TAIL, "CHIP_SELECTIONS", PS_META_REPLACE, "", argv[N]);
         psArgumentRemove (N, &argc, argv);
+    }
+    
+    // apply the chip correction based on the reference astrometry?
+    if ((N = psArgumentGet (argc, argv, "-fixchips"))) {
+        psArgumentRemove (N, &argc, argv);
+        psMetadataAddBool (config->arguments, PS_LIST_TAIL, "PSASTRO.FIX.CHIPS", PS_META_REPLACE, "", true);
+    }
+    // define the reference astrometry file
+    status = pmConfigFileSetsMD (config->arguments, &argc, argv, "REF.ASTROM", "-refastrom", "-refastromlist");
+    if (status) {
+	// if supplied, assume -fixchips is desired
+        psMetadataAddBool (config->arguments, PS_LIST_TAIL, "PSASTRO.FIX.CHIPS", PS_META_REPLACE, "", true);
     }