Index: trunk/Mars/msignal/MSignalCam.cc
===================================================================
--- trunk/Mars/msignal/MSignalCam.cc	(revision 18244)
+++ trunk/Mars/msignal/MSignalCam.cc	(revision 18271)
@@ -594,5 +594,5 @@
 
     // Used inlcudes status unampped
-    if (!pix.IsPixelUsed() && (type<6 || type==8))
+    if (!pix.IsPixelUsed() && (type<6 || type==8 || type==14))
         return kFALSE;
 
@@ -669,5 +669,11 @@
         return pix.GetNumPhotons()>0;
 
-    case 12: // time slope
+    case 13: // time slope
+        val = pix.GetTimeSlope();
+        break;
+
+    case 14: // time slope
+        if (pix.IsPixelUnmapped())
+            return kFALSE;
         val = pix.GetTimeSlope();
         break;