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Air Mass

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Ed Wiley_WEY
Ed Wiley_WEY's picture
Air Mass

Can anyone tell me what the minimum FITS keywords are needed to compute airmass? My earlier images have airmass but the last batch I uploaded lack airmass.

I also note that longitude in the FITS header is +95... not -95. Observatory information is correct and I think SkyX is correct, but I need to check the original images ans see where the problem lies. This does not seem to be the airmass problem since earlier images with +95 seem to have airmass values that make sense..

Thanks
Ed Wiley (WEY)

roe
roe's picture
Air Mass

All VPHOT needs is the altitude of the target (OBJCTALT).

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