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    Default Time from sun's position and observer's location



    I have satellite imagery with the latitude, longitude, and position of the sun (azimuth, zenith, and elevation), but no time-stamp.

    Short of using an astronomy almanac, is there a way to calculate the time from the sun's position and image location?

    I've seen Matlab scripts and ArcGIS tools that do the reverse of this, i.e. they calculate the sun's position based on the lat, lon, and time of the observer, but I'm missing the "time" variable in this case and would like to find it for all of the images.

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    Default Re : Time from sun's position and observer's location

    additional information on Astronomy almanac: https://docsbay.net/astronomical-phenomena-for-the-year-2019

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    Default Re: Time from sun's position and observer's location

    You cannot do it unambiguously. For every Sun position (except at the solstices, when the solutions are unique), there are two date/time combinations that will match the coordinates. You might be able to distinguish them using seasonal clues that may be visible in the photographs.

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    Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide
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