Description : This task will use the ut, date, exposure, ra, dec, ha, and epoch parameters, to calculate and add to your headers the mid-observation UT (utmid), the sidereal time (ost), effective airmass (wairmass), and Julian Date (jd).
Parameters for "headers"
Do an epar on headers and you will get:
Make sure that the new parameters make sense. In particular, check that the new airmass is close to the original airmass, and that the julian date is correct.
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