modJD - Transforms a calendar date and time in die Epoche J2000.0 and in the Modified JD (MJD).
Calculates the Modified Julian Date (MJD) and the Date in the epoche J2000.0 from a given calendar date and time (J,M,T,UT1).
Modified Julian Date The number of days (with decimal fraction of the day) that have elapsed since midnight (UT1) at the beginning of Wednesday November 17, 1858.
MJD = JD - 2,400,000.5
Date in the epoche J2000.0
(matrix aware)
No warranty, there are no inputchecks.
[j2k, mjd] = modJD(y,m,d,ut1)