Index: trunk/ippTools/src/stacktool.c
===================================================================
--- trunk/ippTools/src/stacktool.c	(revision 29249)
+++ trunk/ippTools/src/stacktool.c	(revision 29283)
@@ -982,4 +982,5 @@
     PXOPT_LOOKUP_STR(hostname, config->args, "-hostname", false, false);
     PXOPT_LOOKUP_F32(good_frac, config->args, "-good_frac", false, false);
+    PXOPT_LOOKUP_F64(mjd_obs, config->args, "-mjd_obs", false, false);
 
     PXOPT_LOOKUP_STR(ver_pslib, config->args, "-ver_pslib", false, false);
@@ -1047,4 +1048,5 @@
                                hostname,
                                good_frac,
+                               mjd_obs,
                                fault,
                                software_ver,
Index: trunk/ippTools/src/stacktoolConfig.c
===================================================================
--- trunk/ippTools/src/stacktoolConfig.c	(revision 29249)
+++ trunk/ippTools/src/stacktoolConfig.c	(revision 29283)
@@ -172,4 +172,5 @@
     psMetadataAddStr(addsumskyfileArgs, PS_LIST_TAIL, "-hostname", 0,            "define hostname", 0);
     psMetadataAddF32(addsumskyfileArgs, PS_LIST_TAIL, "-good_frac",  0,            "define %% of good pixels", NAN);
+    psMetadataAddF64(addsumskyfileArgs, PS_LIST_TAIL, "-mjd_obs",  0,            "define mjd_obs (average mjd_obs of inputs)", NAN);
     psMetadataAddS16(addsumskyfileArgs, PS_LIST_TAIL, "-fault",  0,            "set fault code", 0);
     psMetadataAddS16(addsumskyfileArgs, PS_LIST_TAIL, "-quality",  0,            "set quality", 0);