Hemisphere C631 GNSS Smart Antenna

Hemisphere C631 Multi-GNSS Smart Antenna

The C631 is Hemisphere's all-new multi-GNSS, multi-frequency smart antenna that provides high precision and robust performance in a rugged, compact package.



With multiple wireless communication ports and an open GNSS interface, the C631 GNSS smart antenna from Hemsiphere can be used in a variety of operating modes. Use the C631 as a precise base station sending RTK to your existing rover network. Turn the C631 into a lightweight and easy to use rover by connecting it to your base via UHF radio or Wi-Fi network. The built-in web user interface (WebUI) can be used to control and manage the receiver status and operation, as well as to upgrade the C631 with new firmware and activations. C631 is Athena-enabled and Atlas-capable (subscription required).

The C631 receiver is powered by Athena RTK technology. With Athena, C631 provides state-of-the-art RTK performance when receiving corrections from a static base station or network RTK correction system. With multiple connectivity options, the C631 allows for RTK corrections to be received over radio, cell modem, Wi-Fi, Bluetooth, or serial connection. C631 delivers centimeter-level accuracy with virtually instantaneous initialization times and cutting-edge robustness in challenging environments.

The C631 receiver also enables users to work with Atlas. Atlas is Hemisphere’s industry-leading global correction service, which can be added as a subscription to the C631. Atlas delivers world-wide centimeter-level correction data over L-band communication satellites. With Atlas, C631 users can experience sub-decimeter positioning performance anywhere on earth, without the need to be near a GNSS or communication infrastructure.


  • Multi-frequency GPS, GLONASS, BeiDou, Galileo, QZSS, IRNSS, and Atlas L-band
  • Long-range RTK baselines up to 50 km with fast acquisition times
  • UHF (400 MHz & 900 MHz), cellular, Bluetooth, and Wi-Fi wireless communication
  • Athena GNSS engine providing best-in-class RTK performance
  • Internal sensor corrects collected point coordinates to within 2 cm

Technical Specifications

Channel Information
GPS:L1CA, L1P, L1C, L2P, L2C, L5
GLONASS:G1, G2, G3, P1, P2
Galileo:E1BC, E5a, E5b, E6BC, ALTBOC
BeiDou:B1i, B2i, B3i, B1OC, B2A, B2B, ACEBOC
Atlas Capable:Yes
Size:156 mm x 76 mm
Weight:1.19 kg (with one battery)
1.30 kg (with two batteries)
Input Voltage:9 to 28 V DC
Operating Temperature:-30 °C ~ +65 °C
Storage Temperature:-40 °C ~ +80 °C
Shock Resistance:MIL-STD-810G, method 516.6
Humidity:Up to 100%
Vibration:MIL-STD-810G, method 514.6E-I


Hemisphere GNSS products come with a one-year warranty. The warranty, provided by Hemisphere GNSS, means products are guaranteed against defective material and workmanship under normal use for a period of 12 months from the date of shipment. Accessories come with a similar 90-day warranty. The warranty is covered in more detail in the Hemisphere GNSS Service Policy document.

Why Buy from Us?

In business since 2004, Canal Geomatics is an authorized dealer for Hemisphere GNSS and has established itself as an industry-leading distributor of high-precision positioning products in North America. Our mission is to find the best solution for each unique application and extend premium support to ensure the long-term success of our customers. We offer both volume and reseller discounts for the majority of our product lines.


The Hemisphere C631 multi-GNSS smart antenna is available through Canal Geomatics. If you would like more information about this product, please feel free to get in touch with us by completing the Request Pricing form.