Index: trunk/Ohana/src/opihi/dvo/skycoverage.c
===================================================================
--- trunk/Ohana/src/opihi/dvo/skycoverage.c	(revision 33963)
+++ trunk/Ohana/src/opihi/dvo/skycoverage.c	(revision 37807)
@@ -204,15 +204,12 @@
   strcpy (buf[0].file, "(empty)");
 
+  InitCoords (&coords, projection);
   coords.crval1 = RaCenter;
   coords.crval2 = DecCenter;
   coords.crpix1 = 0.5*Nx;
   coords.crpix2 = 0.5*Ny;
-  strcpy (coords.ctype, projection);
-  coords.pc1_1 = -1.0;
+  coords.pc1_1 = -1.0; // sky parity
   coords.pc2_2 = +1.0;
-  coords.pc1_2 =  0.0;
-  coords.pc2_1 =  0.0;
   coords.cdelt1 = coords.cdelt2 = pixscale;
-  coords.Npolyterms = 0;
 
   PutCoords (&coords, &buf[0].header);
@@ -222,5 +219,5 @@
       return (FALSE);
   }
-  BuildChipMatch (image, Nimage);
+  // BuildChipMatch (image, Nimage);
 
   V = (float *)buf[0].matrix.buffer;
@@ -230,6 +227,6 @@
     for (xs = 0; xs < Nx; xs++) {
       status = XY_to_RD (&r, &d, (double)(xs), (double)(ys), &coords);
-      status &= (r >= 0);
-      status &= (r <= 360);
+      r = ohana_normalize_angle (r);
+
       // are we in a part of the projection covering the sky or not?
       if (status) {
@@ -284,6 +281,4 @@
       }
     }
-
-    if (!FindMosaicForImage (image, Nimage, i)) continue;
 
     typehash = wordhash (&image[i].coords.ctype[4]);