Improved guidance and steering accuracy

LH Agro has launched two new Topcon Agriculture manual guidance and autosteering receivers, the AGM-1 and AGS-2. There is also a new satellite and bridging correction service called Topnet Live.

by Steven Vale

17 Sep 2021

The AGS-2 receiver allows up to four satellite constellations (GPS, Glonas, Galileo and Beidou) to be tracked simultaneously for more stable positioning.

Described as the next generation of manual guidance receiver, the AGM-1 replaces the existing SGR-1. The new model provides additional features such as TruPass, for more accurate and stable pass-to-pass positioning.


Both receivers are smaller than their precursors, making them less noticeable when installed and less susceptible to accidental damage.

Additional features include NavBridge which allows GPS signals to be approximated when coverage is interrupted by tree cover, and SkyBridge, a new signal bridging service which ensures machines being guided by the AGS-2 receiver on an RTK signal can continue to operate if the signal is momentarily interrupted.


“The new Topnet Live suite of signal correction services allows users to benefit from an RTK guidance signal without the need to connect to a fixed base station,” comments Richard Reed, LH Agro managing director.

“This system enables growers to operate across a wider area without having to constantly change from one base station to the next, and without having to worry about signal losses.”

Topnet Live is a subscription-based service. There are four levels of accuracy. Realpoint provides RTK accuracy (2cm or less) via a SIM-based mobile data system without the need for a fixed base station. Starpoint Pro provides users with 3-6cm guidance accuracy and uses satellite data.

Starpoint offers correction of 50cm accuracy and uses satellite data. Skybridge offers connection accuracy of 2-4cm via an internet or radio signal and provides a satellite backup service.

Main picture: Burgess and Walker Farms