Crate helioxide 

Re-exports

pub use solar_time::SolarDay;

pub use spa::Observer;

pub use spa::ObserverError;

pub use spa::SolarPosition;

pub use spa::Surface;

pub use spa::SurfaceError;

pub use time::SpaDateTime;

pub use time::SpaTimeError;

Modules

apparent

Apparent sun longitude (λ) and aberration correction (Δτ). Sections 3.6 and 3.7.

delta_t

ΔT = TT − UT1 (seconds), observed values with polynomial fallback.

equation_of_time

Sun mean longitude (M) and equation of time (E). Appendix A.1.

equatorial

Sun geocentric right ascension (α) and declination (δ). Sections 3.9 and 3.10.

geocentric

Sun geocentric longitude (Θ) and latitude (β). Section 3.3.

heliocentric

Earth heliocentric longitude (L), latitude (B) and radius vector (R). Section 3.2, equations 9 to 11, Table A4.2.

helper

Shared scalar helpers used across the SPA pipeline.

horizontal

Topocentric elevation, refraction, zenith and azimuth angles. Sections 3.14 and 3.15.

hour_angle

Observer (H) and topocentric (H') local hour angles. Sections 3.11 and 3.13.

incidence

Surface incidence angle (I). Section 3.16, equation 47.

julian

Julian Day and derived time scales. Section 3.1 plus appendix A.3.

nutation

Nutation in longitude (Δψ) and obliquity (Δε). Section 3.4.

obliquity

Mean (ε₀) and true (ε) obliquity of the ecliptic. Section 3.5.

parallax

Equatorial horizontal parallax (ξ) and topocentric equatorial coordinates (α', δ'). Section 3.12.

sidereal

Mean (ν₀) and apparent (ν) sidereal time at Greenwich. Section 3.8.

solar_time

Sun transit, sunrise and sunset for a given civil day. Appendix A.2.

spa

Orchestrator running the full SPA pipeline end to end.

time

Time inputs for the SPA pipeline.