1-Latitude

2-Longitude

3-Tilt angle

4-Azimuth angle

5-The number of a specific day in the year

1-Declination angle

2-Day lengh

3-Sunrise and sunset times

4-Maximum irradience

5-MAximum incidence angle

6-Maximum solar altitude angle

in that specific day.

1-The rate of irradiance

2-Solar altitude angle

3-Solar Azimuth angle

4-Solar zenith angle

will be calculated from sunrise to sunset.

1-Local Latitude

2-Local Longitude

3-Standard Longitude

4-Zenith angle

5-The angle between panel and rooftop (Beta)

1-Anuual variation of solar irradience on earth in each month

2-Anuual variation of solar irradience out of earth atmosphere in each month

3-Annual declination angle in each day

4-Annual day lenght

5-The time of Sunset and sunrise in each day

6-Annual variation of solar declination in each month

Examples are calculated for longitude and latitude of Tehran in April 15th.