Index: trunk/ippTools/src/regtool.c
===================================================================
--- trunk/ippTools/src/regtool.c	(revision 24733)
+++ trunk/ippTools/src/regtool.c	(revision 24858)
@@ -331,4 +331,5 @@
     PXOPT_LOOKUP_BOOL(faulted, config->args, "-faulted", false);
     PXOPT_LOOKUP_BOOL(simple, config->args, "-simple", false);
+    PXOPT_LOOKUP_BOOL(ordered_by_date, config->args, "-ordered_by_date", false);
 
     psString query = pxDataGet("regtool_processedimfile.sql");
@@ -352,4 +353,9 @@
         // don't list faulted rows
         psStringAppend(&query, " %s", "AND rawImfile.fault = 0");
+    }
+
+    // add the ORDER BY statement if desired
+    if (ordered_by_date) {
+        psStringAppend(&query, " ORDER BY dateobs");
     }