• Features
  • Specifications


    Pint-sized powerhouse

    Get centimeter-level results without being weighed down by your equipment. This compact receiver delivers full-featured, high-precision performance.
          The GCX3 is the ideal local job site base/rover RTK (Real Time
    Kinematic) system or network RTK rover — and like all of our
    solutions, you can customize it to meet your needs and create
    your own workflows.
    • All-in-view constellation GNSS receiver
    • 226 optimized satellite tracking channels
    • Second-generation POST2™ (Precision Orbital Satellite
    Technology) integrated antenna – robust signal tracking
    even around interference sources
    • Compact, lightweight, rugged and cable-free design
    • Ideal network RTK rover
    • Wireless, multi-channel long-range Bluetooth® technology

    The latest in GNSS technology

    The Sokkia GCX3 is a dual-frequency GNSS receiver that delivers RTK centimeter-level performance. It delivers high-quality results for surveying and construction applications, and is versatile enough to be used in a wide-variety of other areas and industries as well.

    Small but mighty

    The GCX3 is an ultra-lightweight, compact solution that minimizes heft on the range pole. You get maximum mobility and ease of use in the field. But do not let the size fool you – the GCX3 antenna performance in obstructed canopy environments outperforms other traditional antenna technology.

    Advanced technologies

    Built with leading-edge technology, the GCX3 brings you the best in GNSS RTK and static data collection. The POST2™ integrated antenna delivers first-class performance. Adding BeiDou,Galileo, SBAS, QZSS, and GAGAN satellite tracking in addition to GPS and GLONASS ensures the best positioning availability.

    Ultimate versatility

    The GCX3 interface is based on an open source architecture. This means you are not limited to a
    specific software for your field controller. While the GCX3 standard system includes suggested software, it is open to fit your workflow.

    Work your way

    Providing flexibility in a variety of ways for static or RTK data collection, the GCX3 easily adapts to nearly any application. A pair of GCX3 receivers can be used as a base and rover using wireless multi-channel long-range Bluetooth® technology RTK corrections. When combined with a cellular-enabled field controller, the GCX3 also performs as an ideal precision network RTK rover.

    Clear communication

    With its wireless multi-channel longrange Bluetooth® technology RTK corrections, the GCX3 eliminates licensing or interference issues. When used as a base, it may support three concurrent GCX3 rovers at a
    range of up to 300 meters.


Tracking Capability
Number of Channels 226 Channels
Tracked Signals GPS L1 C/A, L1C, L2P, L2C GLONASS L1 C/A, L1P, L2 C/A, L2P BeiDou B1, B2 Galileo E1 SBAS L1 C/A WAAS/MSAS/EGNOS/GAGAN QZSS L1 C/A, L1C, L2C
Antenna Type Integrated antenna
Positioning Accuracy
Static/Fast Static H: 3.0 mm + 0.4 ppm, V: 5.0 mm + 0.6 ppm
Precision Static** H: 3.0 mm + 0.1 ppm, V: 3.5 mm + 0.4 ppm
RTK(L1+L2) H: 10 mm + 0.8 ppm, V: 15 mm + 1.0 ppm
DGPS H: 0.4 m, V: 0.6 m
SBAS H: 0.8 m, V: 1 m
Maximum Data Rate 10 Hz
Data Management
Memory Internal non-removable memory up to 8GB
Real Time Data Output TPS, RTCM SC104 v2.x, 3.x and MSM, CMR/CMR+*
ASCII Output NMEA 0183 version 2.x, 3.x and 4.x
Communication Ports Bluetooth® USB 2.0 High Speed Device
Wireless Communication
Bluetooth® Modem v2.1 + EDR v2.1 + EDR
RTK Communication** Through cellular enabled field controllers Up to 300 meters with 3 simultaneous rovers using wireless multichannel long-range Bluetooth® technology RTK corrections
Dust/Water Rating IP67
Humidity 100% condensing
Operating Temperature -20°C to 63°C (with internal batteries) -40°C to 63°C (with external power
Display Type LED user interface
Dimensions (w x h x l) 47 x 197 x 47 mm
Weight (including batteries) 440 g
Power Supply
Battery Type Internal non-removable
Operating Time - All day operation in any configuration (up to 10 hours
External Power Connector Service port (shared with USB 2.0 communication)