The Dopset Tool can be used to calculate absolute (sky) frequencies given a position, an epoch, a rest frequency, and velocity information. The LST day is a term dating back to the VLA days. It can be calculated from the Modified Julian Date (MJD) as follows: LST Day = 6572.1572917 + 1.002737909350759 * MJD
Right Ascension (J2000): Hours Minutes Seconds Declination (J2000): Degrees Minutes Seconds line rest frequency (MHz): velocity (km/s): Frame: LSR Heliocentric Type: radio optical LST day: Hours Minutes Seconds
National Radio
National Radio
National Radio
