<< CL_oe_car2cir Coordinates and frames CL_oe_cir2car >>

CelestLab >> Coordinates and frames > CL_oe_car2kep

CL_oe_car2kep

Cartesian to classical Keplerian orbital elements

Calling Sequence

[kep, jacob] = CL_oe_car2kep(pos, vel [, mu])

Description

Parameters

pos:

Position vector [x;y;z] [m] (3xN)

vel:

Velocity vector [vx;vy;vz] [m/s] (3xN)

mu :

(optional) Gravitational constant. [m^3/s^2] (default value is %CL_mu)

kep:

Classical Keplerian orbital elements [sma;e;inc;pom;raan;M] [m,rad] (6xN)

jacob:

(optional) Transformation jacobian (See Orbital elements for more details) (6x6xN)

Authors

See also

Examples

// Example 1
pos = [7000.e3; 1000.e3; -500.e3];
vel = [1.e3; 2.e3; 7e3];
kep = CL_oe_car2kep(pos, vel);

// Example 2
pos = [7000.e3; 1000.e3; -500.e3];
vel = [1.e3; 2.e3; 7e3];
[kep, jacob1] = CL_oe_car2kep(pos, vel);
[pos2, vel2, jacob2] = CL_oe_kep2car(kep);
pos2 - pos // => zero
vel2 - vel // => zero
jacob2 * jacob1 // => identity

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