Index: trunk/Ohana/src/opihi/cmd.data/tv.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/tv.c	(revision 37807)
+++ trunk/Ohana/src/opihi/cmd.data/tv.c	(revision 38062)
@@ -28,4 +28,15 @@
   }
 
+  int plane = 0;
+  if ((N = get_argument (argc, argv, "-plane"))) {
+    remove_argument (N, &argc, argv);
+    plane = atoi (argv[N]);
+    remove_argument (N, &argc, argv);
+  }
+  if (plane < 0) {
+    gprint (GP_ERR, " ERROR: -plane (plane) : cannot be negative\n");
+    return (FALSE);
+  }
+
   /* shell exits on pipe close, FIX */
   if ((N = get_argument (argc, argv, "-kill"))) {
@@ -55,7 +66,16 @@
   GetCoords (&coords, &buf[0].header);
   
-  image.data1d = (float *) buf[0].matrix.buffer;
   image.Nx = buf[0].matrix.Naxis[0];
   image.Ny = buf[0].matrix.Naxis[1];
+
+  int tooBig = buf[0].matrix.Naxis[2] ? (plane >= buf[0].matrix.Naxis[2]) : plane > 0;
+  if (tooBig) {
+    gprint (GP_ERR, " ERROR: -plane (plane) : out of bounds (%d vs %d)\n", plane, buf[0].matrix.Naxis[2]);
+    return (FALSE);
+  }
+  int Npix2D = image.Nx * image.Ny;
+
+  float *imdata = (float *) buf[0].matrix.buffer;
+  image.data1d = &imdata[plane*Npix2D];
 
   // send only the root of the file, not the full path