README

sunrise

Utility to calculate sunrise and sunset times.

Core code was found on source forge: see citations in code.

Typical use with the at utility that might be run at midday using cron.

$ at -f script `sunrise -et "%H:%M" -h -1` 

 	This will run script at one hour before sunset.
See lush.sh and lushscpt.sh for iexample framework that uses lutrond (lutctrl) 
to schedule Luton lighting control events.


Output of sunrise -u


Usage:
 sunrise [options]
prints sunrise/sunset times for today
options modify behaviour thus:
 -b		begining of day. Print sunrise time
 -e		end of day. Print sunset time
 -t "format"	Print time using strftime format strings
 -s		silent or status print nothing
   		return value = 0-daylight 1-darkness
 -h offset	hour offset. Use to test for time before/after  sunrise/set
   		e.g.  sunset -sh 1 will return 1 until one hour after sunrise
   		then 0, changing to 1, one hour after sunset
 -d day		specify day
 -m month	specify month
 -y year	specify year
 -l lat		specify latitude
 -o lon		specify longitude
 -u		print this usage text

 

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