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Hemisphere GNSS - Vega™ 28 GNSS Compass Board 1

Vega™ 28 GNSS Compass Board

Advanced Heading & RTK Positioning


The Vega™ 28 GNSS Compass Board uses dual antenna ports to create a series of additional capabilities including fast, high-accuracy heading over short baselines, RTK positioning, onboard Atlas L band, RTK-enabled heave, low-power consumption, and precise timing.


With the Vega 28, positioning is scalable and field upgradeable with all Hemisphere software and service options. Utilize the same centimeter-level accuracy in either single frequency mode, or employ the full performance and fast RTK initialization times over long distances with multi-frequency multi-constellation GNSS signals. High-accuracy L band positioning from meter to sub-decimeter levels available via Atlas correction service.

  • GNSS Receiver Specifications:

    Receiver Type: Multi-Frequency GPS, GLONASS, BeiDou, Galileo, QZSS, IRNSS, and Atlas L-band
    Signals Received:

    GPS: L1CA/L1P/L1C/L2P/L2C/L5

    GLONASS: G1/G2/G3, P1/P2

    BeiDou: B1i/B2i/B3i/B10C/B2A/B2B/ ACEBOC GALILEO E1BC/E5a/E5b/E6BC/ALTBOC


    IRNSS: L5

    Atlas L-band

    GPS Sensitivity: -142 dBm
    SBAS Tracking: 3-channel, parallel tracking
    Update Rate: 10 Hz standard, 20 Hz optional (with activation)
    Options: SBAS, Atlas (L-band), RTK



      RMS (67%)
    Autonomous 1.2 m
    SBAS: 0.3 m
    Atlas H10: 0.04 m
    Atlas H30: 0.15m

    Atlas Basic:

    0.5 m
    RTK: 8 mm + 1 ppm

    0.16° @ 0.5 m antenna separation.

    0.08° @ 1.0 m antenna separation.

    0.04° @ 2.0 m antenna separation.

    0.02° @ 5.0 m antenna separation.

    Pitch/Roll 0.5°

    30 cm (DGPS)

    10 cm (Atlas)

    5 cm (RTK) 1




    3 x full-duplex 3.3V CMOS

    1 x USB Host/Device

    1 x Ethernet 10/100Mbps

    2 x CAN (NMEA2000, ISO 11783)

    1 x PPS output, 2 x Event input

    Correction I/O Protocol: Hemisphere GNSS proprietary ROX format, RTCM v2.3, RTCM v3.2, CMR, CMR+
    Data I/O Protocol: NMEA 0183, Hemisphere GNSS binary


    Environmental, Mechanical & Electrical:

    Supply Voltage:

    3.3 VDC +/- 5%

    Power Consumption:

    < 2.5 W all signals + L-band


    71 L x 46 W x 10 H (mm)

    2.8 L x 1.8 W x 0.4 H (in)

    Weight 24g
    Operating Temperature: -40°C to +85°C


    Aiding Devices:

    Gyro: Provides smooth and fast heading reacquisition. During loss of GNSS signals heading stability is degraded by < 1° per minute for up to 3 minutes.
    Tilt Sensors: Provide pitch, roll data and assist in fast start-up and reacquisition of heading solution.
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