300 - Sun Information
The Fortress E1T clock firmware contains calculations of the time of sunrise and sunset for the
geo-location set by the user in the
locale.ini
file . The calculation is reasonably accurate but since
it depends on some simplifications, the results are only displayed to hours and minutes.
Displaying seconds would be misleading.
The firmware can also calculate the instantaneous position of the sun in the sky from the clock's
position. This is given as the angle around the clock's horizontal plane - the azimuth and the
angle from the horizon - the altitude. The azimuth can vary from 0 to 359 degrees and the altitude
from -90 to +90 degrees; a negative altitude indicating the angle below the horizon.
Face number
300
Nuggle file
sunpos.nug
Description
Show the instantaneous
position of the sun. The three
left most tubes (tubes 0 - 2)
show the azimuth in degrees.
The right most tubes (4 - 5)
show the altitude in degrees
(see Colons below for the sign
of the azimuth). Tube 3 is not
used.
Colons
The right colon shows the sign
of the altitude - red indicates a
positive value and blue a
negative value. The left colon
is not used.
Bling
Azimuth tubes - green
Altitude tubes - magenta
Downwards - yellow
Chimes
300
locale.ini
is located in the
/system
folder on the SD card
Page 28
Version 1.0
Copyright Grahame Marsh/Nick Stock 2019
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