Mosaic FOV does not take into account readout mode

[mgdaily]

It was reported that:

When setting up a mosaic, I expect that the “Line Overlap Percent” and “Point Overlap Percent” refer to the field-of-view of the selected Readout Mode (Sinistro or QHY600). However, some tests show that the pointings created when I click “Generate Mosaic” are always for the full field-of-view. ---- Is this the correct behavior? I would expect users who want mosaics to use the larger FoVs, but for the QHY600s, the default readout mode is Central 30x30.

This is because the code used to calculate the FOV of the camera uses the full pixels_x, pixels_y instead of a trimmed down version based on the readout mode, as this information is not currently available via ConfigDB to derive an effective FoV for the camera.

Possible solutions include:

• Adding effective FoV to ConfigDB and plumbing it through to the /api/instruments endpoint in the Observation Portal and using it in the mosaic calculation