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jmpenn ee2f824550
Disable unneeded SimObjects from default_trick_sys.sm in Trick exampl… (#1719) 
* Disable unneeded SimObjects from default_trick_sys.sm in Trick example sims.

* Take out unit test disable. Add some S_defines I forgot.
2024-05-23 10:12:27 -05:00
..
DP_Product In DP_Solar_AZ_EL.xml file, units attributes are changed from d to degree. Ref #323 2016-10-05 14:24:44 -05:00
images Update picture in the SIM_sun README file. REF: #242 2016-05-26 18:37:23 -05:00
models Fix sprintf problem in SIM_sun. #1464 2023-03-01 14:45:23 -06:00
Modified_data Revert "Functions with enumerated default arguments cause bad python code to be generated" 2016-02-18 10:59:26 -06:00
RUN_Summer Python3 exec open (#907) 2019-11-14 13:35:57 -06:00
RUN_test Fix sprintf problem in SIM_sun. #1464 2023-03-01 14:45:23 -06:00
RUN_Winter Python3 exec open (#907) 2019-11-14 13:35:57 -06:00
Doxyfile Initial commit of everything. 2015-02-26 09:02:31 -06:00
README Initial commit of everything. 2015-02-26 09:02:31 -06:00
README.md Updated units specifications in SIM_sun and SIM_wheelbot. 2017-08-04 18:37:16 -05:00
S_define Disable unneeded SimObjects from default_trick_sys.sm in Trick exampl… (#1719) 2024-05-23 10:12:27 -05:00
S_overrides.mk mv helios models to SIM_sun/models/Sun 2016-02-22 12:22:27 -06:00
sun.tv Fix tv file which was horked somehow 2016-09-14 17:17:44 -05:00

README.md

SIM_sun

Picture of Sun

The Simulation

SIM_sun is a simulation of the Sun's movement across the sky. Given the location (latitude, longitude) of an observer on the Earth, the timezone (offset from UTC), and a starting local time, this simulation calculates the position of the Sun in the sky over time.

Inputs

Variable Type Units
sun_predictor.sun.observer_latitude double degree
sun_predictor.sun.observer_longitude double degree
sun_predictor.sun.observer_offset_from_UTC int hr
sun_predictor.sun.local_time CALENDAR_DATE --

CALENDAR_DATE

Member Type Units
year int --
month int --
day int day
hour int hour
min int min
sec double s

Outputs

Variable Type Units
sun_predictor.sun.JD double day
sun_predictor.sun.right_ascension double degree
sun_predictor.sun.declination double degree
sun_predictor.sun.hour_angle double degree
sun_predictor.sun.local_sidereal_time double s
sun_predictor.sun.sidereal_time_at_Greenwich double s
sun_predictor.sun.solar_azimuth double degree
sun_predictor.sun.solar_elevation double degree
sun_predictor.sun.local_time CALENDAR_DATE --
sun_predictor.sun.utc CALENDAR_DATE --

NOTE: 0 <= Solar Azimuth < 360 degrees. North = 0, East = 90, South = 180, West = 270.

Scenarios

RUN_Winter

RUN_Summer

References

Meeus, Jean, (1998) "Astronomical Algorithms", Willmann-Bell, Inc. ISBN 0-943396-61-1.