Images captured with SGP and Atik 460EX write the DATE-OBS and DATE-LOC fields in the FITS headers in the format '2020-11-09T01.20.21.0000000' when they should be '2020-11-09T01:20:21.0000000' as per ISO 8601.
Could you confirm whether the timestamp comes directly from the camera driver or is it something SGP figures out on its own?
I noticed the problem when stacking images in PixInsight. It shows the following kind of errors during stacking:
*** Error: Parsing DATE-OBS FITS keyword: Parsing ISO 8601 date/time expression: Parsing 64-bit floating point expression: conversion error:
23.08.32.0000000
~~~~~^
I am not sure. Any other applications that might write to or rewrite FITS headers involved here? SGPro writes FITS dates in the following format: yyyy-MM-ddTHH:mm:ss.fffffff
Even if the camera does supply the date, SGPro is actually responsible for the formatting prior to writing the FITS file out.
Nope, the images are directly coming from SGP. But I have a hunch it is a locale issue. The PC controlling my astrophotography gear has regional formatting set to Finnish, as you can see in the screenshot.
If I change the formatting to English (United States) and capture new images, the FITS dates are in the correct format. So I think some part of the code is using the current locale for formatting the datetime string instead of a constant locale.
See documentation for the time format strings assuming your code is in C#: 