Changes between Initial Version and Version 1 of VarianceMaps

Timestamp:

Oct 5, 2011, 5:49:33 PM (15 years ago)

Author:

heather

Comment:

--

VarianceMaps

@@ +1 @@
+The Variance Maps have patterns.
+
+We investigated the variance maps for different stages/processing:
+
+ * chip (md)
+ * warp (md)
+ * stack (md and sas)
+
+There are periodic patterns associated with warp and stack, which are not associated with chip.  
+
+Here is a zoom of one of the unconv.wt.fits for SAS footprint: (stack_Id= 336346). You can see an odd periodic background. The yellow circles are the false detections.
+
+
+Here is a zoom of one of the unconv.wt.fit stacks for a recent MD refstack, it not quite as strange, but still, there is an underlying odd, periodic background.
+
+
+Chip stage does not have this background (click to zoom in)
+
+|| chip   || chip.wt ||
+
+
+Warp stage (for the same chip) has a very strange background for the weight map (click to zoom in)
+
+
+|| warp  || warp.wt ||