Index: trunk/ippTools/src/pxchip.c
===================================================================
--- trunk/ippTools/src/pxchip.c	(revision 19419)
+++ trunk/ippTools/src/pxchip.c	(revision 20750)
@@ -72,4 +72,5 @@
     psMetadataAddF32(md,  PS_LIST_TAIL, "-solang_max",         0, "search by max solar angle", NAN);
     psMetadataAddStr(md,  PS_LIST_TAIL, "-comment",            0, "search by comment field (LIKE comparison)", NULL);
+    psMetadataAddStr(md,  PS_LIST_TAIL, "-obs_mode", 0, "search by observation mode", NULL);
     return true;
 }
@@ -123,4 +124,5 @@
     PXOPT_COPY_F32(config->args, where, "-solang_max", "rawExp.solang", "<");
     PXOPT_COPY_STR(config->args, where, "-comment", "rawExp.comment", "LIKE");
+    PXOPT_COPY_STR(config->args, where, "-obs_mode", "rawExp.obs_mode", "==");
     return true;
 }