What epoch does ArcMap 10.4 reference when you choose GCS_WGS_1984 as the datum?
Is it the current epoch of 2005.0 equivalent with ITRF08, or the previous epoch
of 1997.0 equivalent with ITRF00?
I am finding that much of the reference material online is outdated
as it lists the current realization of WGS84 to be equivalent to
ITRF00, Epoch 1997.0. This article by NGS (http://www.ngs.noaa.gov/CORS/Articles/SolerWGS84(G1674)-to-NAD83(2011).pdf)
explains that GPS satellites actually report their X,Y & Z location values
in IGS08, which is also equivalent to WGS84(G1674)/ITRF08. However, the epoch
of the recorded points is the time they were transmitted from the satellites;
