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05:37, 19:37 07:00, 18:14
How can I get these into four separate variables in a bash script please.
would be ideal names to use for this.
By way of explanation astronomical twilight is defined as the sun being 18 degrees below the horizon (really dark). Civil twilight is when the sun is 6 degrees below the horizon and military twilight is 12 degrees below. Sunset is when the upper limb of the sun is just visible above the horizon ignoring atmospheric anomalies. With atmospheric anomalies it is generally considered to be 50 arcminutes below the horizon or 90.83 degrees below zenith. Sunset is unsurprisingly the revers of sunrise.
Thanks for your help.