Time scale difference TDB minus TREF using JPL's DExxx ephemerides
[tdb_tref] = CL_ephDE_getTDB(cjd, ephem [[, tt_tref, opts]])
Returns the value TDB - TREF using JPL's DExxx ephemerides.
The optional structure opts contains the optional fields:
- conv_to_tdb (boolean): if %f, the time scale used internally to retrieve the data is TT. Otherwise, a more precise method is used, equivalent to using TDB as defined in the ephemeris file. By default: %t.
Notes:
- An error is raised if the ephemeris file does not contain TDB.
- (advanced) Setting opts.conv_to_tdb to %f and tt_tref to 0 comes down to considering that cjd is actually given in the TDB time scale.
Modified (1950.0) julian day (Time scale: TREF) (1xN)
Scilab structure describing the ephemerides (see "See Also").
(optional) TT-TREF [s]. Default is %CL_TT_TREF. (1xN or 1x1)
(structure, optional). Additional options. See above for details.
Value of TDB minus TREF [s] (1xN)
CNES - DCT/SB