SunEarthTools.com | ||||

Tools for consumers and designers of solar |

Insert this map tool in your site

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

coordinates: | (Daylight saving time [true|false]) | ||

year: | Time zone: | (GMT Greenwich Mean Time) | |

Step : | (minutes) | download Excel | download CSV | |

email: |

Set the data as you wish and click on email image to get the file in attach.

The excel file contain the sun path for one year, with step (5,10,15,20,30,60 min), for the moment restricted as a result of is just too heavy for the server.

The first column contain the date the others columns contain E=elevation A=azimuth and time (from 00:00 to 23:59).

For the annual SunRise SunSet Calendar additionally on excel file you’ll be able to use this link: Sunrise Sunset Calendar

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

The measurement of the length of the shadow depends on the height of the obstacle and the elevation of the sun, the formula is:

length shadow = object height/tan ( sun elevation ).

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

The knowledge of the position of the sun and the daylight hours, allow to know the

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

The azimuth angle indicates the direction of the sun in the horizontal plain from a given location. North is defined to have an azimuth of 0° and south has an azimuth of 180°.

The various trajectories of the sun’s in the sky are bounded by those of the 21st day (solstice) of each month from December 21 until June 21.

We plot the time, on the hour, for all hours during which the sun is in the chart.

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

The duration depends on the latitude, the longitude, altitude above sea level (more high and more great the length of day) and obstacles horizon.

The algorithm uses the altitude 0 meters.

The transition from day to night is not clear before and after there is a period of scattered light (twilight), where you can still see, the phenomenon is due to reflection (down) of light by the atmosphere that it’s over to our point of observation.

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

# Press the down arrow on your keyboard to move south

# Press the right arrow on your keyboard to move east

# Press the left arrow on your keyboard to move west

# Zoom slider - Drag the zoom slider up or down to zoom in or out incrementally

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

1) Select a point in the map, can set this centre by search on a given address and can drag the yellow bulb in the map to adjust where you want (for instance in your garden to later show sun or shadows directions).

To find in the map, the coordinates (latitude, longitude), read the guide How to use the tool map.

2) Choose a date & time for your calculation.

3) Choose your local time zone, caution: Mind to select the correct time (summer time vs winter) according to your chosen date.

4) Click execute button. You can view several sun charts, according to the option modes you select.

If you want to save or change your favorites points go to the link (after the login) then you can select them directly from the map.

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

n=day of the year.

Δt = 9.873 sin( 4π / 365.242 ( n - 81 )) - 7.655 sin( 2π / 365.242 ( n - 1 ))

| Δt = 3:46 [ minute : seconds ] | Date : 16 / 05 / 2021 | Change data

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

reference: Solar Position Algorithm - Michalsky, Joseph J. 1988. The Astronomical Almanac’s algorithm for approximate solar position (1950-2050).

Accuracy of 0.01 deg, the observed values may vary from calculations because they depend by: atmospheric composition, temperature, pressure and other conditions.

To reduce the atmospheric refraction in sunrise and sunset, we assume -0.833 degree in the calculated value.

The calculated results aren't certificated, than you can use for educational, work, research but not for litigation.

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

Are the date, the values are selectable by combo, the default is today.

Are the time, the values are selectable by combo, the default is now.

Greenwich Mean Time, identifies the time zone of reference of the Earth. If we divide the 360° for 24 to obtain a 24 parts every 15° longitude, in reality the area is bounded by national borders.

Daylight saving time, clocks are adjusted forward one hour near the start of spring and are adjusted backward in autumn.

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

Degree is an integer value without sign, from 0 to 90 for the latitude or from 0 to 180 for the longitude. Minute is an integer value without sign, from 0 to 59. Seconds is a double value without sign, from 0 (or 0.0000) to 59.9999.

52.5163 , 13.3779

40.7682 , -73.9816

-22.9708 , -43.1830

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |

Thanks in advance for your contribution to improve this site (please correct the errors of grammar and translation).

Back to top Content | Data + Map | Chart Polar | Chart Cartesian | Table | Annual sun path | shadow | download PDF |