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53 lines
2.3 KiB
Markdown
53 lines
2.3 KiB
Markdown
# SIM\_sun
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### The Simulation
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SIM\_sun is a simulation of the Sun's movement across the sky.
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Given the location (latitude, longitude) of an observer on the
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Earth, the timezone (offset from UTC), and a starting local time,
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this simulation calculates the position of the Sun in the sky over time.
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### Inputs
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Variable | Type | Units
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-----------------------------------------------|----------------|-------
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sun\_predictor.sun.observer\_latitude | double | d
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sun\_predictor.sun.observer\_longitude | double | d
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sun\_predictor.sun.observer\_offset\_from\_UTC | int | hr
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sun\_predictor.sun.local\_time | CALENDAR\_DATE | --
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### CALENDAR\_DATE
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Member | Type | Units
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---------------------------|--------------------|---------
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year | int | --
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month | int | --
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day | int | day
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hour | int | hour
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min | int | min
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sec | double | s
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### Outputs
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Variable | Type | Units
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-------------------------------------------------|----------------|--------
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sun\_predictor.sun.JD | double | day
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sun\_predictor.sun.right\_ascension | double | d
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sun\_predictor.sun.declination | double | d
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sun\_predictor.sun.hour\_angle | double | d
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sun\_predictor.sun.local\_sidereal\_time | double | s
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sun\_predictor.sun.sidereal\_time\_at\_Greenwich | double | s
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sun\_predictor.sun.solar\_azimuth | double | d
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sun\_predictor.sun.solar\_elevation | double | d
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sun\_predictor.sun.local\_time | CALENDAR\_DATE | --
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sun\_predictor.sun.utc | CALENDAR\_DATE | --
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**NOTE:** 0 <= Solar Azimuth < 360 degrees. North = 0, East = 90, South = 180, West = 270.
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### Scenarios
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#### [RUN_Winter](RUN_Winter/RESULTS.md)
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#### [RUN_Summer](RUN_Summer/RESULTS.md)
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### References
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Meeus, Jean, (1998) "Astronomical Algorithms", Willmann-Bell, Inc. ISBN 0-943396-61-1.
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