Constants

API Reference

class satkit.consts

Some constants that are useful for saetllite dynamics

property GM: Gravitational parameter of Earth, m^3/s^2

property au: Astronomical Unit, mean Earth-Sun distance, meters

property c: Speed of light, m/s

property earth_moon_mass_ratio: Earth mass over Moon mass, unitless

property earth_radius: Earth radius along major axis, meters

property geo_r: Distance to Geosynchronous orbit from Earth center, meters

property jgm3_a: Earth semiparameter from JGM3 gravity model, m

property jgm3_j2: “J2” gravity due oblateness of Earth from JGM3 gravity model, unitless

property jgm3_mu: Earth gravitational parameter from JGM3 gravity model, m^3/s^2

property moon_radius: Radius of moon, meters

property mu_earth: Gravitational parameter of Earth, m^3/s^2

property mu_moon: Gravitational parmaeter of Moon, m^3/s^2

property mu_sun: Gravitational parameter of sun, m^3/s^2

property omega_earth: Scalar Earth rotation rate, rad/s

property sun_radius: Radius of sun, meters

property wgs84_a: WGS-84 semiparameter, in meters

property wgs84_f: WGS-84 flattening in meters