Nea .gsf files not always include Interferometer Center/Distance

[markotoplak]

#739 broke the existing Nea gsf reader. At least some of the files I see lack "Interferometer Center/Distance" and therefore it crashes.

[markotoplak]

@brnovasco, I see you added the part that was crashing from @borondics's file.

Why did you expect that this always appears in the files? It is in the specification? Or is it version dependant?

[ngergihun]

@markotoplak I think we have run into a image gsf against spectrum gsf issue. The old neaspec gsf reader was meant to import interferograms or spectra because way back in time neaspec was exporting these measurements also in .gsf. At the same time, neaspec also exports single image data as .gsf but the image files (like the one from @borondics) have no "Interferometer Center/Distance" header lines.

[markotoplak]

Ok, I understand that this can happen, but we have to ensure that the common utilities run for all the variants.

[brnovasco]

@brnovasco, I see you added the part that was crashing from @borondics's file.

Why did you expect that this always appears in the files? It is in the specification? Or is it version dependant?

I was replicating the behavior that was written in the owfft widget, that assumes that if the reader is 'NeaReaderGSF' it expects it to have the 'Interferometer Center/Distance' field. Sorry I missed this error.

[markotoplak]

Oh, I understand. Thanks for the explanation. No problem, we'll have to remodel these readers anyway.