Index: trunk/ippToPsps/jython/dvo.py
===================================================================
--- trunk/ippToPsps/jython/dvo.py	(revision 36190)
+++ trunk/ippToPsps/jython/dvo.py	(revision 36201)
@@ -630,4 +630,17 @@
         maxDEC = boxDim['maxDEC'] + dD_border
 
+        #find out if we use a time_range or not
+        valid_trange_start = 0
+        valid_trange_end = 0
+        use_trange = 0 
+        if (self.skychunk.trange_start != '0000-00-00 00:00:00'):
+            valid_trange_start = 1
+        if (self.skychunk.trange_end != '0000-00-00 00:00:00'):
+            valid_trange_end = 1             
+
+        if (valid_trange_start and valid_trange_end):
+            use_trange = 1
+
+
         # TODO path to DVO prog hardcoded temporarily
         cmd = "dvopsps detections"
@@ -646,4 +659,15 @@
             cmd += " -parallel"
 
+        if use_trange:
+            # make tranges valid for dvopsps
+            time_start1 = self.skychunk.trange_start
+            time_end1 = self.skychunk.trange_end
+            time_start=re.sub('\s+',',',time_start1)
+            time_end=re.sub('\s+',',',time_end1)
+           
+            # make command
+            cmd += " -time-start " + time_start
+            cmd += " -time-end " + time_end
+   
         self.logger.infoPair("Running dvopsps", cmd)
         p = Popen(cmd, shell=True, stdout=PIPE, stderr=PIPE)