Hemisphere S631 GNSS Smart Antenna

Hemisphere S631 Multi-GNSS Smart Antenna

The S631 is Hemisphere's all-new multi-frequency, multi-GNSS smart antenna that provides high precision and robust performance in a rugged, compact package.



The S631 multi-GNSS smart antenna from Hemisphere delivers centimeter-level accuracy with cutting-edge robustness and virtually instantaneous initialization times even in challenging environments. It can be used in several operating modes via an open GNSS interface and multiple wireless communication ports.

Use the S631 as a lightweight rover by connecting it to your base via cellular network or UHF radio. Turn S631 into a precise base station sending RTK to your existing rover network. The built-in web user interface can be used to upgrade the S631 with new firmware and activations, as well as to monitor and control the receiver status and operation.

The S631 is Athena-enabled and Atlas-capable (subscription required). With Athena, S631 provides state-of-the-art RTK performance when receiving corrections from a network RTK correction system, or a static base station. With multiple connectivity options, the S631 allows for RTK corrections to be received via serial connection, Bluetooth, Wi-Fi, cell modem, or radio.

The S631 receiver also enables users to use Atlas. Atlas can be added as a subscription to the S6321 and it provides Hemisphere’s industry-leading global correction service. Atlas delivers global centimeter-level correction data over L-band communication satellites. S631 users are able to experience sub-decimeter positioning performance anywhere on earth with Atlas, without having to be near a communication or GNSS infrastructure.


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

Technical Specifications

Channel Information
GPS:L1CA, L1P, L1C, L2P, L2C, L5
BeiDou:B1i, B2i, B3i, B1OC, B2A, B2B, ACEBOC
GLONASS:G1, G2, G3, P1, P2
Galileo:E1BC, E5a, E5b, E6BC, ALTBOC
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 S631 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.