1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
// SPDX-License-Identifier: AGPL-3.0-or-later
// Copyright (C) 2026 Vallés Puig, Ramon
//! # ELP2000-82B Coefficient Structures
//!
//! ## Scientific scope
//!
//! The ELP2000-82B theory (Chapront-Touzé & Chapront 1988) partitions its
//! Poisson-series terms into three families depending on which gravitational
//! perturbations they model:
//!
//! - **Main Problem** — the Earth–Moon–Sun three-body problem without planetary
//! perturbations. Arguments are the four Delaunay angles D, M, Mʹ, F.
//! - **Earth Perturbations** — figure, tidal, and relativistic corrections
//! involving the same four Delaunay angles plus an explicit power of T.
//! - **Planetary Perturbations** — gravitational influence of the eight planets
//! (Mercury through Neptune), using eleven combined planetary/lunar arguments.
//!
//! Each family is represented by a distinct coefficient record type defined here.
//!
//! ## Technical scope
//!
//! - [`MainProblem`] — one sine term of the Main Problem series; amplitude `a`
//! in 10⁻⁴ arc-seconds, integer Delaunay multipliers, and phase polynomial
//! coefficients b₀…b₅.
//! - [`EarthPert`] — one Earth-perturbation term; amplitude `a` in 10⁻⁴
//! arc-seconds, T-exponent `iz` (dimensionless), phase rate `o`
//! (radians / Julian-millennia), and constant phase `p` (radians).
//! - [`PlanetPert`] — one planetary-perturbation term; amplitude `theta` in
//! 10⁻⁴ arc-seconds, eleven integer planetary multipliers, phase rate `o`
//! (radians / Julian-millennia), and constant phase `p` (radians).
//!
//! All numeric fields use raw `f64`; the typed conversion to physical units
//! (arc-seconds → radians → km) is performed in [`super::elp_series`].
//!
//! ## References
//!
//! - Chapront-Touzé, M., & Chapront, J. (1988). "ELP 2000-82B: A semi-analytical
//! lunar ephemeris adequate for historical times".
//! *Astronomy and Astrophysics* 190, 342–352.
pub use crate;