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SunCalcMeeus 0.1.2

• Add function irrad_extraterrestrial() implementing estimation of the (shortwave) energy irradiance at the top of the atmosphere above a specific geographic location and at a given instant in time. The irradiance is estimated on a plane tangential to the surface of the “sphere” or Earth globe. Thus, it returns the solar constant corrected for the angle of incidence and for the current Earth-Sun distance.
• Add on-line only article with accuracy and performance tests based on comparisons to alternatives.

SunCalcMeeus 0.1.1

• Add function relative_AMt() implementing Young’s (1994) AM approximation based on the true position of the sun.
• Add relative_AM_geotime() and relative_AMt_geotime()as convenience wrapper functions.
• Increase test coverage to nearly 95% with new tests and fix some minor bugs.
• Fix bug in distance_to_sun(), the value returned was totally off-mark.

SunCalcMeeus 0.1.0

• Package created as a spin-off from ‘photobiology’ by moving the astronomical computations related to the sun position, unchanged.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.