Antenna Calibration Tables

Q.] I'm looking for more information on the phase center variation for a NovAtel GPS antenna than what is listed in the antenna user guide -- where can I find this data?

A.] Geo++ and NGS have these tables; here are some links to their websites:

http://www.ngs.noaa.gov/cgi-bin/query_cal_antennas.prl?Model=NOV

http://gnpcvdb.geopp.de/pcvdb/GNPCVDB.html