Image:DayLength.png

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[edit] Summary

Description

Length of day (sunrise to sunset), in hours, as a function of latitude and time of year. Sunrise and sunset times were calculated using the FORTRAN program sunae.f found at ftp://climate1.gsfc.nasa.gov/wiscombe/Solar_Rad/SunAngles/sunae.f. Atmospheric refraction appropriate for the US Standard Atmosphere is applied at all latitudes, though the correction should vary by latitude and time of year. Contours are not necessarily smooth because of the 0.5-degree latitude spacing used in the calculations. Calculations were performed for the 365 days in 2007 on the Greenwich Meridian.

Source

self-made

Date

5 September 2007

Author

StephenHudson

Permission
(Reusing this image)

see below


SVG version available, but it seems to load very slowly: Image:DayLength.svg

[edit] Licensing

Public domain I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

In case this is not legally possible:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.


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File history

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Date/TimeDimensionsUserComment
current03:54, 6 September 20071,017×807 (169 KB)StephenHudson ({{Information |Description=Length of day (sunrise to sunset) as a function of latitude and time of year. Sunrise and sunset times were calculated using the FORTRAN program sunae.f found at ftp://climate1.gsfc.nasa.gov/wiscombe/Solar_Rad/SunAngles/sunae.f)
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