astro::vsop87d Namespace Reference

Classes
struct	Coefficients
	Representing 3 coefficients in a VSOP87D term. More...
struct	PlanetTables
	The type trait for the VSOP87D tables. Expected specializations in *_coeff.hpps. More...
struct	Evaluation
	The result of the VSOP87D evaluation. More...

Typedefs
using	Vsop87dTable
	The VSOP87D table of coefficients.
using	Vsop87dTables
	The VSOP87D tables.

Enumerations
enum class	Planet : uint8_t {   EAR , MER , VEN , MAR ,   JUP , SAT , URA , NEP }
	The planets supported by VSOP87D. More...

Functions
auto	evaluate_table (const Vsop87dTable &vsop_table, const double jm) -> double
	Return the sum of all the terms in the given VSOP87D table, for the given julian millennium.
auto	evaluate_tables (const Vsop87dTables &vsop_tables, const double jm) -> double
	Evaluate the given VSOP87D tables on the given julian millennium.
template<Planet planet>
auto	evaluate (const double jm) -> Evaluation
	Evaluate the VSOP87D tables on the given julian millennium.

Variables
constexpr double	SCALING_FACTOR
	The scaling factor used for the VSOP87D tables in this project.

Typedef Documentation

Vsop87dTable

using astro::vsop87d::Vsop87dTable

The VSOP87D table of coefficients.

Vsop87dTables

using astro::vsop87d::Vsop87dTables

The VSOP87D tables.

Enumeration Type Documentation

Planet

enum class astro::vsop87d::Planet : uint8_t

strong

The planets supported by VSOP87D.

Enumerator
EAR
MER
VEN
MAR
JUP
SAT
URA
NEP

Function Documentation

evaluate()

template<Planet planet>

auto astro::vsop87d::evaluate ( const double jm ) ->Evaluation

inlinenodiscard

Evaluate the VSOP87D tables on the given julian millennium.

Template Parameters

planet

The planet to evaluate.

Parameters

jm	The julian millennium since J2000, calculated based on JDE (julian ephemeris date).

Returns

The evaluation result. VSOP87D provides the heliocentric ecliptic spherical coordinates for the equinox of the day.

Example

evaluate<Planet::EAR>(0.0) means evaluating the Earth's L, B, and R tables on the given julian millennium 0.0.

evaluate_table()

auto astro::vsop87d::evaluate_table ( const Vsop87dTable & vsop_table, const double jm )->double

inlinenodiscard

Return the sum of all the terms in the given VSOP87D table, for the given julian millennium.

Parameters

vsop_table	The VSOP87D table.
jm	The julian millennium.

Returns

The sum of the terms in the table.

Example

evaluate_table(astro::vsop87d::earth::L0, 0.0) means apply the Earth's L0 table on the given julian millennium 0.0.

evaluate_tables()

auto astro::vsop87d::evaluate_tables ( const Vsop87dTables & vsop_tables, const double jm )->double

inlinenodiscard

Evaluate the given VSOP87D tables on the given julian millennium.

Parameters

vsop_tables	The VSOP87D tables.
jm	The julian millennium.

Returns

The evaluated result. As per the VSOP87D model, the result is in radians.

Example

evaluate_tables(astro::vsop87d::earth::L, 0.0) means apply all Earth's L tables on the given julian millennium 0.0.

Variable Documentation

SCALING_FACTOR

double astro::vsop87d::SCALING_FACTOR

inlineconstexpr

The scaling factor used for the VSOP87D tables in this project.

Note

In this project, the coefficient "A"s in the tables are multiplied by 1e8. So before getting the correct radians, we need to divide them by 1e8.