Topcon has released Version 3.4 of its G3 receiver firmware, which upgrades the performance and usability of Topcon GNSS receiver platforms including the GR-3 and new GRS-1 systems. The 3.4 firmware also increases compatibility between Topcon rover systems and a variety of base station brands and models. Users of Topcon’s receiver systems can download the upgrade free from the company’s support Web site.