CL_mod_meanObliquity

Description

• This function is deprecated.

• Computes the mean obliquity and its time derivatives (see IERS standards 1996).

Parameters

jj_tai :

(integer) Modified (1950.0) Julian day (1xN)

sec_tai :

Seconds (TAI time scale) (1xN)

flag :

(string, optional) "p" -> eps0 and eps0p; "s" -> eps0, eps0p and eps0pp (default depends on number of outputs)

eps0 :

Mean obliquity [rad] (1xN)

eps0p :

(optional) First time derivative of [rad/s] (1xN)

eps0pp :

(optional) Second time derivative of eps0 [rad/s^2] (1xN)

Authors

• CNES - DCT/SB

Bibliography

• 1) IERS Conventions (1996), Dennis D. McCarthy

• 2) Explanatory Supplement to the Astronomical Almanac, Seidelman (1992)

See also

• CL_mod_nutationAngles

• CL_mod_nutationArg

• CL_mod_precessionAngles

Examples

jj_tai = [19500:1:20500]; ss_tai = 43200*ones(jj_tai); [eps0,eps0p,eps0pp]=CL_mod_meanObliquity(jj_tai,ss_tai,"s"); plot(jj_tai'+ss_tai'/86400,eps0'*180/%pi);