Sidereal time (ECI to ECF rotation angle)
[sidt,sidtdot] = CL_mod_siderealTime(cjd [,ut1_tref,frame])
Computes the sidereal time from an inertial frame to a rotating frame.
Optional argument frame can take on three values:
- "ECI": (default) sidereal time is from ECI to ECF
- "CIRS": sidereal time is from CIRS to TIRS
- "Veis": sidereal time is from Veis to PEF
The time derivative can also be optionally computed.
See Reference frames and Configuration for more details
Modified (1950.0) Julian day (Time scale: TREF) (1xN)
(optional) UT1-TREF [seconds]. Default is %CL_UT1_TREF (1xN or 1x1)
(string, optional) Name of the inertial frame. Default is "ECI" (1x1)
Sidereal time [rad]
Sidereal time first derivative [rad/s]
CNES - DCT/SB
// Use default time scale (TREF), and default frame (ECI) [sidt,sidtdot] = CL_mod_siderealTime(21915.3252) // TREF = UTC, UT1-UTC = 0.2 and Frame = Veis cjd_utc = CL_dat_cal2cjd(2008,10,25,15,30,25); ut1_tref = 0.2; [sidt,sidtdot] = CL_mod_siderealTime(cjd_utc, ut1_tref, "Veis") |  |  |