Need updates to DGEO warning message

[samanthalh]

Hello! I'm working on a WFPC2 DrizzlePac ticket (INC0154128, for reference) and the user asked about the lengthy warning message below. I feel this needs to be updated for two reasons: 1) it provides users with an IRAF hedit command, and IRAF is deprecated, and 2) it should explain that for WFPC2 and other archival instruments, it is fine and expected to type 'c' and continue running drizzle. I don't believe that's clear at that moment. Thanks!!

A 'DGEOFILE' keyword is present in the primary header but 'NPOLFILE' keyword was not found. This version of the software uses a new format for the residual distortion DGEO files. Please consult the instrument web pages for which reference files to download. A small (new style) dgeofile is needed ('_npl.fits' extension) and possibly a detector to image correction file ('_d2i.fits' extension). The names of these files must be added to the primary header either using the task XXXX or manually, for example:

hedit u2pq0505t_c0m.fits[0] npolfile fname_npl.fits add+ hedit u2pq0505t_c0m.fits[0] d2imfile fname_d2i.fits add+

where fname_npl.fits is the name of the new style dgeo file and fname_d2i.fits is the name of the detector to image correction. After adding these keywords to the primary header, updatewcs must be run to update the science files:

from stwcs import updatewcs updatewcs.updatewcs("u2pq0505t_c0m.fits")

Alternatively you may choose to run astrodrizzle without DGEO and detector to image correction.

To stop astrodrizzle and update the dgeo files, type 'q'. To continue running astrodrizzle without the non-polynomial distortion correction, type 'c':

[stsci-hack]

@samanthalh Please check out #647 to see whether this will make the warning more appropriate for the users.

[stsci-hack]

Resolved with #647 on 22-Apr-2020.