C321 GNSS Smart Antenna

Hemisphere C321 GNSS Smart Antenna

The C321 GNSS Smart Antenna from Hemisphere GNSS has reached End of Life (EOL) and has been replaced by the new C321+ GNSS Smart Antenna.



Hemisphere GNSS’ C321 multi-GNSS, multi-frequency receiver. It manages all jobsite activities including grade management, graphical stakeout, in-the-field volume calculations, CAD layer management and so much more, when paired with a Window’s based handheld and Hemisphere’s SiteMetrix™ field software.

When paired with Hemisphere GNSS’ SiteMetrix Site Management Software, the C321 can be used as an all-in-one construction base and rover site controller. The C321 performs in harsh construction environments and empowers heavy equipment manufacturers to deliver their proprietary control and guidance solutions to their customers.

Bundled with Hemisphere’s Atlas L-band correction service, this solution allows users to utilize Atlas anywhere in the world, with 8 cm, 95% accuracy (4 cm RMS).


  • Base station with internal UHF radio
  • UHF rover
  • Network rover
  • Multi-GNSS including GPS, GLONASS, BeiDou, QZSS, Galileo, SBAS and L-band
  • Atlas® L-band corrections
  • aRTK™ capabilities – Satellite-based RTK augmentation

Technical Specifications

Dimensions:14.1 cm (D) x 14.0 cm (H)
Weight:<1.38 kg
Battery:Rechargeable 11.1 V -37.74 Wh intelligent lithium battery, with 6-hour battery life (with one battery and UHF radio in Rx mode), and 7-hour typically charge time.
Memory:Internal 4 GB memory card, accessible through USB and Wi-Fi; external MicroSD card slot, supports up to 64 GB and user accessible SIM card slot
Operating temperature:-30 °C to +60 °C


The C321 GNSS Smart Antenna can be ordered from Canal Geomatics. Please contact us using the Request Pricing form for additional information.