2.0.2

Changes

• Fixed lost significant digits in azel transform. See: How Futile are Mindless Assessments of Roundoff in Floating-Point Computation ? §11: A Case Study of Bits Lost in Space (Mindless.pdf)
• Updated documentation

2.0.1

Changes

• Added preprocessor directives for Arduino.h / cmath.
• Further optimization of sunrise & sunset routine.
• Minor fixes to example sketches and documentation.

2.0.0

Notable changes

• Unix time input is now supported as unsigned long.
• Optimizations for code size and performance:
  • Neglect of all terms < 0.005 degree, including higher powers of time T (in Julian centuries), nutation, and ΔT.
  • Simplified expressions for the Julian day, atmospheric refraction correction, equation of time, and ΔT.
  • Simplified rising, transit, and setting algorithm.
• New iterations parameter in calcSunriseSunset, which can be set to 0 to get the approximate times.
• New example sketch for the rise and set times at a height above the horizon (using the altitude parameter).

Breaking changes

• Sun's radius vector is now calculated with calcEquatorialCoordinates.
• Some intermediate calculations have been removed, e.g. nutation.

1.0.3

Changes

• Update example sketches, add solar tracking example
• Update documentation

1.0.2

Changes

• Simplify past Delta T expressions to long-term parabolas (does not affect present and future calculations)

1.0.1

Changes

• Convert from Universal Time (UT) to Dynamical Time (TD) before calculation of solar coordinates
• Add MIT License

1.0.0

Initial release