GNSS Solutions has two antenna model files, antenna.ini and antenna_abs.ini, which appear to correspond to the NGS old and new absolute models. Within the program, antenna.ini seems to be the default, but I can't find any way to utilize the absolute models other than perhaps renaming the files (antenna.ini to antenna_rel.ini and then copy antenna_abs.ini to antenna.ini). Anyone know or have a solution? The NGS is now publishing control in NAD 83(2011) rather than NAD 83(cors). What do I need to do with the spacial reference system (if anything) as it does not seem to be one of the predefined systems? Thanks.