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Home > Solar > Sun Position
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| Data + Map | Chart Polar | Chart Cartesian | Table | 
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| Data + Map | Chart Polar | Chart Cartesian | Table |
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| Data + Map | Chart Polar | Chart Cartesian | Table |
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| Data + Map | Chart Polar | Chart Cartesian | Table |
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| Data + Map | Chart Polar | Chart Cartesian | Table |
Sunrise and sunset are defined as the instant when the upper limb of the Sun’s disk is just touching the horizon, this corresponds to an altitude of -0.833° degrees for the Sun.
Twilight is the time after sunset characterized by a diffuse light (by extension the morning twilight, use term aurora, dawn or sunrise).
Civil twilight lapse of time between sunset and when the sun reaches the elevation height of -6°, in the sky are visible only a few stars and planets particularly bright.
Nautical twilight represents the time the Sun takes a pass from -6° to -12° below the horizon, in this period are distinguished horizon line and the main stars.
Astronomical twilight is the time interval between sunset and when the sun reaches 18° below the horizon, the sky is dark, is possible to distinguish the stars up to the sixth magnitude.
Noon in solar time occurs when the sun is at its highest point in the sky for the day, and it is either due south or due north of the observer depending on the latitude.
Azimut indicates an angle between a point and a reference plane. Generally is the angular distance of a point from the North.
The height, or Elevation , is the angular distance of the horizon a point on the celestial sphere, measured as positive if facing the Zenith, and negative if directed towards the Nadir.
Zenith , is the intersection perpendicular to the plane of the horizon passing through the observer with the visible celestial hemisphere and is the point above the head of the observer. The diametrically opposite point is called Nadir.
The knowledge of the position of the sun and the daylight hours, allow to know the energy radiated from the Sun (renewable) at the point on the Earth that we are examining.
The solar energy can be heat engines produced from solar panels or electrical produced by photovoltaic panels.
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| Data + Map | Chart Polar | Chart Cartesian | Table |
Cartesian coordinates where the solar elevation is plotted on X axis and the azimuth is plotted on the Y axis.
Polar coordinates are based on a circle where the solar elevation is read on the various concentric circles, from 0° to 90° degrees, the azimuth is the angle going around the circle from 0° to 360° degrees, the horizon is represented by the outermost circle, at the periphery.
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.
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| Data + Map | Chart Polar | Chart Cartesian | Table |
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.
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| Data + Map | Chart Polar | Chart Cartesian | Table |
# Address (example: Central Park West, New York), (example: Macquarie St, Circular Quay NSW 2000, Australia)
# Geographic features (example: torre di pisa) (example: louvre)
# Places - Cities, towns, states, provinces, states and continents (example: Berlin, Germany)
# Coordinates (example: 41.38716 , 2.17010), (example: -34° 36’ 43.56" -58° 24’ 3.6" ), (example: 41° 53’ 24.72" N 12° 29’ 32.64" E)
# 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
# saveAsDefault
# Zoom In Here
# Zoom Out Here
# Clear Markers
# Mode: Point - Distance - Polyline - Area. see help Use Mode
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| Data + Map | Chart Polar | Chart Cartesian | Table |
To find in the map, the coordinates (latitude, longitude), read the guide How to use the tool map.
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| Data + Map | Chart Polar | Chart Cartesian | Table |
n = day of the year.
Δt = 9.873 sin( 4π / 365.242 ( n - 81 )) - 7.655 sin( 2π / 365.242 ( n - 1 ))
| Δt = 3:20 [ minute : seconds ] | Date : 24 / 05 / 2013 | Change data
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| Data + Map | Chart Polar | Chart Cartesian | Table |
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 ).
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Content
| Data + Map | Chart Polar | Chart Cartesian | Table |
Are the date, the values are selectablly by combo, the default is today.
Hour : Minute
Are the time, the values are selectablly by combo, the default is now.
Time zone GMT
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.
DST
Daylight saving time, clocks are adjusted forward one hour near the start of spring and are adjusted backward in autumn.
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| Data + Map | Chart Polar | Chart Cartesian | Table |
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
to open the webpage Earth Coordinate, here you obtain the latitude and longitude simply by clicking on the map, and save the value by the button save.
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Content
| Data + Map | Chart Polar | Chart Cartesian | Table |
Thanks in advance for your contribution to improve this site (please correct the errors of grammar and translation).
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Content
| Data + Map | Chart Polar | Chart Cartesian | Table |
Insert this map tool in your site
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Content
| Data + Map | Chart Polar | Chart Cartesian | Table | Back to top
Content
| Data + Map | Chart Polar | Chart Cartesian | Table | Back to top
Content
| Data + Map | Chart Polar | Chart Cartesian | Table | Back to top
Content
| Data + Map | Chart Polar | Chart Cartesian | Table |
Sun Position
Content
Sun Position
Sun chart
Daylight
How to use the tool map
Use Mode
Equation of time
shadow
Date
Format
Comment
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| Data + Map | Chart Polar | Chart Cartesian | Table | Sun Position
Calculation of sun’s position in the sky for each location on the earth at any time of day. Azimuth, sunrise sunset noon, daylight and graphs of the solar path.Sunrise and sunset are defined as the instant when the upper limb of the Sun’s disk is just touching the horizon, this corresponds to an altitude of -0.833° degrees for the Sun.
Twilight is the time after sunset characterized by a diffuse light (by extension the morning twilight, use term aurora, dawn or sunrise).
Civil twilight lapse of time between sunset and when the sun reaches the elevation height of -6°, in the sky are visible only a few stars and planets particularly bright.
Nautical twilight represents the time the Sun takes a pass from -6° to -12° below the horizon, in this period are distinguished horizon line and the main stars.
Astronomical twilight is the time interval between sunset and when the sun reaches 18° below the horizon, the sky is dark, is possible to distinguish the stars up to the sixth magnitude.
Noon in solar time occurs when the sun is at its highest point in the sky for the day, and it is either due south or due north of the observer depending on the latitude.
Azimut indicates an angle between a point and a reference plane. Generally is the angular distance of a point from the North.
The height, or Elevation , is the angular distance of the horizon a point on the celestial sphere, measured as positive if facing the Zenith, and negative if directed towards the Nadir.
Zenith , is the intersection perpendicular to the plane of the horizon passing through the observer with the visible celestial hemisphere and is the point above the head of the observer. The diametrically opposite point is called Nadir.
The knowledge of the position of the sun and the daylight hours, allow to know the energy radiated from the Sun (renewable) at the point on the Earth that we are examining.
The solar energy can be heat engines produced from solar panels or electrical produced by photovoltaic panels.
Back to top
Content
| Data + Map | Chart Polar | Chart Cartesian | Table | Sun chart
Sun path charts can be plotted either in Cartesian (rectanglar) or Polar coordinates.Cartesian coordinates where the solar elevation is plotted on X axis and the azimuth is plotted on the Y axis.
Polar coordinates are based on a circle where the solar elevation is read on the various concentric circles, from 0° to 90° degrees, the azimuth is the angle going around the circle from 0° to 360° degrees, the horizon is represented by the outermost circle, at the periphery.
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 | Daylight
The length of day is the time interval between sunrise and sunset, so the time period in which we can observe the direct sunlight.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 | How to use the tool map
Search
allows you search for the following:# Address (example: Central Park West, New York), (example: Macquarie St, Circular Quay NSW 2000, Australia)
# Geographic features (example: torre di pisa) (example: louvre)
# Places - Cities, towns, states, provinces, states and continents (example: Berlin, Germany)
# Coordinates (example: 41.38716 , 2.17010), (example: -34° 36’ 43.56" -58° 24’ 3.6" ), (example: 41° 53’ 24.72" N 12° 29’ 32.64" E)
Map pan control
# Press the up arrow on your keyboard to move north# 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
Map zoom control
# Zoom: Click + to zoom in on the center of the map, click - to zoom out.# Zoom slider - Drag the zoom slider up or down to zoom in or out incrementally
Coordinates
This text visualize the coordinates referring to the marker on the map.Address
This text visualize the address of the marker on the map.MAP
This area displays the map, search results and much more.Left click
Set a marker on the map and update the values in the text fields coordinates and address.Double click
Zoom in on the center of the map.Right click
open a context menu# saveAsDefault
# Zoom In Here
# Zoom Out Here
# Clear Markers
# Mode: Point - Distance - Polyline - Area. see help Use Mode
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Content
| Data + Map | Chart Polar | Chart Cartesian | Table | Use Mode
Before selecting the mode of use, select a point in the map, right-click button in the menu and choose in the menu: saveAsDefault, this way you save the reference default.To find in the map, the coordinates (latitude, longitude), read the guide How to use the tool map.
Point
by left clicking on the map appears a marker that contain the latitude, longitude and street address information, each click creates a new marker.Distance
by left clicking on the map appears a marker and a line from the default marker to new marker, the next click remove the old marker and creates a new. On the top text fielt you can visualize the distance value between the two points, measured in Km, mile (mi) or for short distance meters (mt), foot (ft).Polyline
by left clicking on the map appears a marker and a segment from the previous marker to new marker, all marker are linked with segment from the default. On the top text fielt you can visualize the distance value from default to the last point, measured in Km, mile (mi) or for short distance meters (mt), foot (ft). This is very useful to calculate the distance of a path of trekking, mountain bike, sport, free time ...Area
Measure the area enclosed in the polyline, the perimeter of the area and highlighted the direction of the last segment.Rays of the Sun
View the map the height and direction of sunlight.Shadow
View on map the length (normalized, change with the zoom map) and the direction of the shadow produced by an obstacle, the formula is: shadow object lenght = object height / tan(sun elevation degree).Units of measurement
km - kilometers, mt - meters, mi - miles, ft - foot, nmi - nautical miles. Back to top
Content
| Data + Map | Chart Polar | Chart Cartesian | Table | Equation of time
A Simple Expression for the Equation of Time:n = day of the year.
Δt = 9.873 sin( 4π / 365.242 ( n - 81 )) - 7.655 sin( 2π / 365.242 ( n - 1 ))
| Δt = 3:20 [ minute : seconds ] | Date : 24 / 05 / 2013 | Change data
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| Data + Map | Chart Polar | Chart Cartesian | Table | shadow
The length of the shadow map is normalized (changing with the zoom), and the direction is opposite azimuth.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 ).
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Content
| Data + Map | Chart Polar | Chart Cartesian | Table | Date
Year Month DayAre the date, the values are selectablly by combo, the default is today.
Hour : Minute
Are the time, the values are selectablly by combo, the default is now.
Time zone GMT
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.
DST
Daylight saving time, clocks are adjusted forward one hour near the start of spring and are adjusted backward in autumn.
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Content
| Data + Map | Chart Polar | Chart Cartesian | Table | Format
Value range
Valid value for the latitude are from -90.0° to 90.0° for the longitude are from -180.0° to 180.0°, the + sign should be omitted, while the minus sign is not necessary if there is a radio component to select the direction N-S or W-E (Degree and Decimal format).Decimal
You have to select a direction (N-S or W-E) and insert a number from 0 to 90 for the latitude or from 0 to 180 for the longitude (example 45.12345).Degree
Degree format is composed of direction (N-S or W-E) and three sets of numbers separate by the symbols for degrees (°), minutes (’), and seconds (").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.
Coordinates
Coordinates format is the pair of latitude and longitude, with sign minus (-) for the direction south latitude and west longitude separate by comma symbol (,), here some example:52.5163 , 13.3779
40.7682 , -73.9816
-22.9708 , -43.1830
Search on map
Click on search to open the webpage Earth Coordinate, here you obtain the latitude and longitude simply by clicking on the map, and save the value by the button save. Back to top
Content
| Data + Map | Chart Polar | Chart Cartesian | Table | Comment
If detected inaccuracies bug, want to suggest new features or simply express your opinion of the site web add a comment.Thanks in advance for your contribution to improve this site (please correct the errors of grammar and translation).
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| Data + Map | Chart Polar | Chart Cartesian | Table | | Reported by: |
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