CL_oe_convert

Description

• Converts orbital elements from a given type to another.

  Available types of orbital elements are: "kep", "cir", "cireq", "equin" and "pv".

  Orbital elements of type "pv" are position and velocity in a 6xN vector ([pos;vel]).

  See Orbital elements for more details on orbital elements.

• Notes:

  The gravitational parameter "mu" is only used when converting to or from "pv" type.

Parameters

type_oe1:

(string) Type of input orbital elements ("kep", "cir", "cireq", "equin" or "pv") (1x1)

type_oe2:

(string) Type of output orbital elements ("kep", "cir", "cireq", "equin" or "pv") (1x1)

oe1:

Input orbital elements (6xN)

oe2:

Output orbital elements (6xN)

mu:

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

cjac:

(boolean, optional) Jacobian computation indicator: %t if jacobian should be computed. Default is %t

jacob:

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

Authors

• CNES - DCT/SB

Examples

// Example 1 pos = [7000.e3; 1000.e3; -500.e3]; vel = [1.e3; 2.e3; 7e3]; kep = CL_oe_convert("pv", "kep", [pos; vel]) // Example 2 cir = [7000.e3; 0.1; 0.2; 1; 2; 3]; [kep, jacob1] = CL_oe_convert("cir", "kep", cir); [cir2, jacob2] = CL_oe_convert("kep", "cir", kep); cir2 - cir // => zero jacob2 * jacob1 // => identity