Max number of fields : how to exceed the 2025 limit ?

  • 25 November 2022
  • 2 replies

Badge +2

Dear all,

I’m working on a project of ultra-precise micro-arcsecond relative astrometry space observatory (Theia). 

Especially, I need to map the image plane (0.5°x0.5°) with a very high accuracy. For instance, I have to study the variations of positions of the PSF (with CENX/CENY) due to some perturbations (distortion, tilts of the mirrors...).

By default, the number of fields is limited to 2025 for my premium version, but I would need 100x100 fields.

It’s rather easy to generate such a new grid, but the parameter “i” (field number) of CENX/Y refers to the (default) field table.

Is there a way to use CENX/Y with this new grid ?

Many thanks,



Best answer by Mark.Nicholson 26 November 2022, 20:31

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2 replies

Userlevel 7
Badge +3

Hi Thierry,


I’d try a Universal Plot for this. You can vary field and step size to be whatever you want, I think.

Badge +2

Many Thanks Mark.

I will try.