NCAT is just for shifting between various flavors of NAD83 and then it also gives you state plane and UTM output given whatever NAD83 datum you set as the destination.
the screen capture above is of HTDP which does way more. it can not only move between WGS realizations and NAD83 implementations , it can also account for local time based shifts based on plate movement (veloocity) hence the name “Horizontal Time-Dependent Positioning”.
as to the core of your question
the latest realization of WGS84 is g1762 (look at the htdp pull down and you will see it) and it is based on IGS08B (soon it will probably move to ITRF2014/IGS14 but as of now its IGS08B)
emlid products are not set in any specific datum but they only work in the lat long coordinate system. so you could go out with one reach unit as a base station and have it autonomously average a point to determine its location. that point will be in WGS84(g1762) with a EPOCH of the day you gathered the data. you could then use HTDP to convert the point to NAD83(2011) and then enter that as your base station location. then start up the rover, get a fix from the base, and all of your resulting rover values will be NAD83(2011) in latitudes and longitudes.
you may want to fall down this rabbit hole…