rotn2jd

Source: utils/date_time/rotn2jd.pro

 rotn2jd
        Convert a rotation number to a julian day number

 Usage:
        jd = rotn2jd(rot, system)

 Arguments:
        rot     double  input   The rotation to convert.
        system  int     input   0 for bartels, 1 for carrington

 History:
        Original: 23/8/00; SJT
        Fixed origin points: 6/6/01; SJT