Index: trunk/ppSim/src/ppSimUtils.c
===================================================================
--- trunk/ppSim/src/ppSimUtils.c	(revision 19850)
+++ trunk/ppSim/src/ppSimUtils.c	(revision 20365)
@@ -139,4 +139,5 @@
     psMetadataAddStr(fpa->concepts, PS_LIST_TAIL, "FPA.FILTERID", PS_META_REPLACE, "Filter name", filter);
     psMetadataAddStr(fpa->concepts, PS_LIST_TAIL, "FPA.FILTER", PS_META_REPLACE, "Filter name", filter);
+    psMetadataAddF32(fpa->concepts, PS_LIST_TAIL, "FPA.AIRMASS", PS_META_REPLACE, "airmass (dummy value)", 1.0);
 
     return true;