Relative Antenna Calibrations               Complete Relative Antenna Calibration File

This file contains the relative antenna calibrations, where all antenna offsets and phase center variations are computed with respect to the AOAD/M_T antenna.

Absolute Antenna Calibrations               Complete Absolute Antenna Calibration File

This file contains absolute antenna calibrations where all the relative antenna offsets and phase center variations that the National Geodetic Survey has computed have been added to the absolute values for AOAD/M_T antenna as described by:   http://www.geopp.com/gnpcvdb/AOA_DM_T/ . The absolute antenna calibration file is primarily intended for IGS Analysis Centers and others who are interested in combining absolute antenna calibrations with the newly determined BLK II A z-offsets described elsewhere in this website.