Examples
// Example : mean_kep = [7.e6; 1.e-2; 1.7; 0; 0; 0 ]; // sma, ecc, inc... info = CL_ex_getInfo("lydsec", "kep", mean_kep) |  |  |
Information about a propagation model
[info] = CL_ex_getInfo(mod, type_oe, mean_oe [, er, mu, j1jn])
Computes data related to the specified orbit propagation model and for the given orbital elements.
The available models are:
"central": Central force (osculating elements = mean elements)
"j2sec": Secular effects of J2 (osculating elements = mean elements by convention)
"lydsec": Lyddane (mean elements include secular effects only)
"lydlp": Lyddane (mean elements include secular and long period effects)
"eckhech": Eckstein-Hechler (mean elements include secular and long period effects)
The computed information is gathered in a structure (info):
- info.mod: Model name
Additional information:
eckhech:
- info.exf: Mean eccentricity vector x-component (e * cos(w)) of frozen orbit
- info.eyf: Mean eccentricity vector y-component (e * sin(w)) of frozen orbit
- info.dgomdt: Mean secular drift of right ascension of ascending node [rad/s]
- info.dpsodt: Mean secular drift of argument of latitude (w+M) [rad/s]
lydsec, j2sec or central:
- info.eccf: Mean eccentricity of frozen orbit
- info.pomf: Mean argument of periapsis of frozen orbit
- info.dgomdt: Mean secular drift of right ascension of ascending node [rad/s]
- info.dpsodt: Mean secular drift of argument of latitude (w+M) [rad/s]
Note:
The outputs depend on semi major-axis, eccentricity and inclination only.
See Propagation models for more details.
(string) Model name: "central", "j2sec", "lydsec", "lydlp", "eckhech". (1x1)
(string) Type of orbital elements used for input/output: "kep", "cir", "cireq" or "equin" (1x1)
Mean orbital elements (6xN).
(optional) Equatorial radius [m] (default is %CL_eqRad)
(optional) Gravitational constant [m^3/s^2] (default value is %CL_mu)
(optional) Vector of zonal coefficients J1 to Jn (troncated to J6) to be used (default is %CL_j1jn(1:6)) (1xNz)
(structure) Information data for the given orbital elements (containing (1xN) vectors)
CNES - DCT/SB
// Example : mean_kep = [7.e6; 1.e-2; 1.7; 0; 0; 0 ]; // sma, ecc, inc... info = CL_ex_getInfo("lydsec", "kep", mean_kep) | | |