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CelestLab >> Geometry and events > CL_gm_orbitalNoon

CL_gm_orbitalNoon

Argument of latitude at the position of orbital noon

Calling Sequence

[pso_orb_noon] = CL_gm_orbitalNoon(inc,raan,alpha_sun,delta_sun)

Description

Parameters

inc:

Orbit inclination [rad] (1xN)

raan:

Orbit right ascension of ascending node [rad] (1xN)

alpha_sun:

Sun right ascension [rad] (1xN)

delta_sun:

Sun declination [rad] (1xN)

pso_orb_noon:

Argument of latitude(w+M) at the position of orbital noon [rad] (1xN)

Authors

See also

Examples

cjd=21482;
raan=0;
sma = 1000000+%CL_eqRad;
inc = CL_deg2rad(98);
[r_sun,rs] = CL_mod_moonSunG50(cjd,'s');
sol_sph = CL_co_car2sph(r_sun.*(rs.*.ones(3,1)));
alpha_sun = sol_sph(1,:);
delta_sun = sol_sph(2,:);
pso_orb_noon = CL_gm_orbitalNoon(inc,raan,alpha_sun,delta_sun)

// Comparison with CL_gm_eclipseCir :
[result] = CL_gm_eclipseCir(sma,inc,raan,alpha_sun,delta_sun)
pso_midnight = (result.start.pso + result.end.pso ) / 2
pso_noon = pso_midnight + %pi
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