CL_mod_sidTime

Description

• This function is deprecated.

  Replacement function: CL_mod_siderealTime

• Computes the Greenwich mean sidereal time gmst (IERS standard 1996).

  It also optionally computes the first derivative of the sidereal time : gmstp. (this value is not a constant)

Parameters

cjd_ut1:

Modified (1950.0) Julian day, in UT1 time scale (1xN)

gmst :

Greenwich mean sidereal time [rad]

gmstp :

Greenwich mean sidereal time first derivative [rad/s]

Authors

• CNES - DCT/SB

Bibliography

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

See also

• CL_mod_sidTimeG50

Examples

cjd_utc = CL_dat_cal2cjd(2008,10,25,15,30,25) // 25 oct 2008 at 15h30min25s sec_ut1_minus_utc = 0.2; cjd_ut1 = cjd_utc + sec_ut1_minus_utc/86400.; // ut1 time gmst = CL_mod_sidTime(cjd_ut1); [gmst,gmstp] = CL_mod_sidTime(cjd_ut1); // With first time derivative : [gmst,gmstp] = CL_mod_sidTime(21915.121212)