Opened 16 years ago
#1407 new defect
MD04 refstack/altstack skycells don't have pixel data in the overlap regions
| Reported by: | Michael Wood-Vasey | Owned by: | eugene |
|---|---|---|---|
| Priority: | normal | Milestone: | |
| Component: | misc | Version: | |
| Severity: | normal | Keywords: | |
| Cc: |
Description
The MD04 reference stacks have blank/NAN regions on the edges. Is this the disagreement between the tessellations chosen for the warps and for the stacks? The skycells have 15-pixel boundaries on each side. If you ask ds9 to line them up according to WCS, you get 30-pixel NaN boundaries between the skycells.
This is true in both the MD04 refstack (0.258"/pix) and the altstack (0.2"/pix). This is true for both the unconv and conv images. All have a 15 pixel buffer. The 0.258"/pix version is this missing more sky.
Is an error in the tessellation specification or in the stacking?
See, e.g.,
skycell.054/MD04.skycell.054.stk.120969.unconv.fits
skycell.055/MD04.skycell.055.stk.120970.unconv.fits
Image attached. This image looks the same in the refstack or altstack.
Attachments (2)
Change History (2)
by , 16 years ago
| Attachment: | MD04_altstack_blank_edges.jpg added |
|---|
by , 16 years ago
| Attachment: | MD04_refstack_blank_edges.jpg added |
|---|
MD04 refstack skycell 54-54 boundary.
MD04 altstack skycell 54-54 boundary.