20 September 2006: With the introduction of the Leica AT504 GG, Leica Geosystems is announcing a new version of its successful AT504 choke ring antenna for permanent reference stations and networks. This new antenna tracks GNSS observations, supplying high quality GPS and GLONASS data when used in conjunction with Leica GPS1200 GNSS receivers. The design of the AT504GG choke ring antenna effectively suppresses multipath effects and has a very stable phase center making it ideally suited for geodetic applications using GNSS observations.
Following the successful introduction of the Leica GRX1200 GG Pro reference station receiver, a GNSS version of the Leica choke ring antenna is now available – the Leica AT504 GG.
The Leica AT504 GG guarantees uncompromising phase center stability (