The geographical coordinates system is a tool to locate any point or city on earth
surface, as as explained before a complete circle around the earth has 360 degree
and each degree is divided in 60 minutes and each minute in 60 seconds, The parallels
of latitude are referenced to the Equator which is at 0o or at the origin, the extremes
are at the North Pole at +90O or 90oN and the South Pole at -90o or 90os since the
distance from the Equator could be the same, always the direction north (N) or south
(S) must be specified.
The latitude lines or meridians have as reference the Greenwich meridian or prime
meridian at 0o, longitude is always measured in referenced to the prime meridian
west or east from cero to 180o.
Longitude must specify a direction west o east from the prime meridian, example
Each angular coordinate has a corresponding linear distance from the reference point,
the approximate values are:
One degree of latitude is approximately 111 kilometers, one minute (‘) is 111/60
= 1.85 kilometers and one second (“0) is about 111 /3600 = is about 30.8 meters at
or near the equator As example a point located at latitude 1oN will be at somewhere
1 X 111 = 111 kilometers north of the equator, buts as the latitude circles are closer
to the Equator one degree will represent proportionally less distance, if the longitude
coordinates is 6oW, the point location will be at 666 kilometers west of the Greenwich
meridian, therefore the location of our point is latitude (1o,0’,0”)N and longitude
(6o,0’,0”)W. This point is in the Atlantic Ocean near Africa.
OK now, how I optimally align my solar panel toward the sun?
The best productivity is achieved by aligning the module in perpendicular direction
to the sun at noon, one way to achieve the best position for the year around due
to the sun seasonal direction changes is by given your panel a tilting angle equal
to your latitude in degrees -15oin summer, for winter the angle must your latitude
in degrees +15o, be sure that your ground is leveled.