irv and the keyword
jd is used to select the radial velocities made on
a single observing night. The first two digits of the Julian
date (24) may be omitted.
The standard options are used to select data obtained
later than (-gt), earlier than (-lt) a
Julian date or between (-i) two Julian dates.
irv jd -eq 46789
irv jd -gt 44000 774