Need to simulate a rectangular CCD

[noqsi]

SpyFFI can only simulate a square CCD. While the TESS CCDs are officially 2048 square, they really have 2068 rows. Except for a few bottom rows covered in Al, these rows are optically sensitive, so they will be a source of blooming and streaking just like the rest of the array. They will appear in the raw images. There is, in fact, no reason to avoid using them for science, too. We need to include them in simulations.

[rkvanderspek]

Minor corrections/clarifications:

The raw images will have 2078 rows:
2048 official imaging rows
10 buffer rows above the imaging area
10 virtual rows created in the imaging area, useful for measuring smear
10 virtual rows created in the framestore area
The bottom, partially-covered rows will not appear in the FFIs: the image-to-FS clocking is 2078 rows

On Oct 5, 2016, at 12:02 PM, John P. Doty [email protected] wrote:

SpyFFI can only simulate a square CCD. While the TESS CCDs are officially 2048 square, they really have 2068 rows. Except for a few bottom rows covered in Al, these rows are optically sensitive, so they will be a source of blooming and streaking just like the rest of the array. They will appear in the raw images. There is, in fact, no reason to avoid using them for science, too. We need to include them in simulations.

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[noqsi]

The optical simulation needs to include the partially-covered rows, since they will bloom and smear. This requires changes to existing SPyFFI code.

Right now, I'm planning to add the virtual rows and edit out the dropped rows downstream of the optical simulation, as a separate functional operation outside the existing SPyFFI code.