daylight.frink

View or download daylight.frink in plain text format


// Calculates duration of daylight over the course of a year.

// Requires the sun.frink high-precision astronomical library.
use sun.frink

lat =   40 degrees North
long = 105 degrees West
TZ =   "US/Mountain"

out =  ### yyyy-MM-dd ###
time = ### HH:mm:ss ###

temp = F[64]
pressure = 29.90 inHg

for date = #2017# to #2018# step 1 day
{
   sunrise = sunrise[date, lat, long, temp, pressure]
   sunset  = sunset[date, lat, long, temp, pressure]

   daylength = sunset - sunrise

   print[(date -> out) + "\t" + (daylength -> [hour, min, sec, 0])]
   println["\t" + (sunrise -> [time, TZ]) + "\t" + (sunset-> [time, TZ])]
}


View or download daylight.frink in plain text format


This is a program written in the programming language Frink.
For more information, view the Frink Documentation or see More Sample Frink Programs.

Alan Eliasen was born 17592 days, 15 hours, 35 minutes ago.