// WGS84 Table B.1
pub const RE_EQ_M: f64 = 6_378_137.0; // Equatorial radius in meters
pub const RE_EQ_KM: f64 = 6_378.137;
pub const MU_M: f64 = 3.986_004_418e14; // GM in m^3*s^−2
pub const MU_KM: f64 = 3.986_004_418e5; // GM in km^3*s^−2

pub const ECC: f64 = 0.0818191908425; // Eccentricity, TODO: check value
pub const FLAT: f64 = 1.0 / 298.257_223_563; // Flattening
pub const OMEGA_E: f64 = 7.292_115e-5; // Earth rotating rate in rad/sec

pub const RE_AVG_M: f64 = 6371e3; // averaged radius in meters
pub const RE_AVG_KM: f64 = 6371.0;

// standard gravity
pub const G0: f64 = 9.80665;

// Bate (1971), Fundamentals Of Astrodynamics, pp.419-422.
pub const J2: f64 = 1082.63e-6;
pub const J3: f64 = -2.52e-6;
pub const J4: f64 = -1.61e-6;
pub const J5: f64 = -0.15e-6;
pub const J6: f64 = 0.57e-6;
