Full System Full Frequency Point RTK Positioning Module

Full System Full Frequency Point RTK Positioning Module

ER-GM-4B0 Features:
1. New nebulas-II high-performance SoC chip;
2. Full system multi-frequency RTK;
3. Supports up to 20Hz data output rate;
4. Integrated 6-axis MEMS chip, autonomous integrated navigation.

Full System Full Frequency Point RTK Positioning Module

Full System Full Frequency Point RTK Positioning Module

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    ER-GM-4B0 Full System Full Frequency Point RTK Positioning Module


    ER-GM-4B0 Full System Full Frequency Point RTK Positioning Module is the world’s smallest high-precision positioning module based on the Nebulas-II high-precision SoC chip. It supports BDS B1/B2/B3, GPS L1/L2/L5, GLONASS L1/L2, Galileo E1/E5a/ E5b, QZSS L1/L2/L5 and other satellite signals.

    The product supports combined navigation of narrow-band anti-jamming and inertial navigation equipment, and its applications are mainly for light robots, GIS information collection, intelligent driving, unmanned aerial vehicles, etc.

    ER-GM-4B0 uses a single Nebulas-II baseband chip and a single high-precision RF chip, with the highest integration in the industry. It has realized the world’s first full-system full-frequency RTK surface-mount module in a 30x40x4mm volume, which can significantly reduce the terminal volume.

    New generation Nebulas-II SoC chip

    ER-GM-4B0 uses a new generation full-system multi-core high-precision SoC chip-Nebulas-II. This chip is based on the mature Nebula baseband chip core technology, supports 432 channels, built-in broadband ADC and anti-interference unit, integrates two 600MHz ARM processors and dedicated high-speed floating-point arithmetic processors to provide more powerful satellite navigation signal processing ability.

    Full system full frequency RTK engine

    ER-GM-4B0 uses a full system full-frequency point RTK engine, which can simultaneously process the multi-frequency observation data of satellite systems such as BDS, GPS, GLONASS, GALILEO, etc., making full use of the unique three-frequency of BDS, GPS, and Galileo satellite systems.

    The advantages significantly improve the initialization speed, measurement accuracy, and reliability of RTK in difficult environments such as urban blocks and shades, and achieve long-baseline centimeter-level RTK positioning.

    Gypsophila RTK processing technology

    The new generation of Gypsophila RTK processing technology makes full use of the high-performance data sharing function and ultra-simplified operating system in the Nebulas-II chip to fully optimize the multi-dimensional RTK matrix pipeline calculation. The RTK processing capacity is increased by more than 80% and the stability is achieved. 30 More than one RTK positioning solution and re-acquisition time within 1s.

    Autonomous MEMS Integrated Navigation

    ER-GM-4B0 integrates a 6-axis MEMS chip and uses a mature and reliable U-Fusion integrated navigation algorithm, which can effectively solve problems such as the interruption of positioning results caused by satellite signal loss of lock, and further optimizes the determination in complex environments such as buildings, tunnels, and viaducts. The positioning of the output to the output greatly improves the continuity and reliability of the output data.


    30×40mm industry’s smallest full system multi-frequency high-precision positioning directional surface-mount module

    New Nebulas-II high-performance SoC chip

    Full system multi-frequency RTK

    Supports up to 20Hz data output rate

    Integrated 6-axis MEMS chip, autonomous integrated navigation

    Advanced multipath suppression technology

    Centimeter-level high-precision RTK positioning

    Serial, SPI, 1PPS, Event and other physical interfaces

    Support RTC hot start

    RTCM format adaptive recognition


    Drones, robots

    Smart driving test

    Precision agriculture


    Aisle432 channels based on Nebulas-II chip
    FrequencyBDS B1/B2/B3, GPS L1/L2/L5, GLONASS L1/L2, Galileo E1/E5b/E5a
    Single point positioning (RMS)Plane: 1.5m  Elevation: 3.0m
    DGPS (RMS)Plane: 0.4m  Elevation: 0.8m
    RTK (RMS)Plane: 1.0cm+1ppm  Elevation: 1.5cm+1ppm
    Hot start time<10s
    Cold start time<25s
    Recapture time<1s
    Initialization time<5s (typical value)
    Initial reliability>99.9%
    Differential dataRTCM 2.X/3.X CMR
    Data formatNMEA-0183, Unicore
    Data update rate20Hz
    Positioning update rate20Hz
    Timing accuracy (RMS)20ns
    Orientation accuracy (RMS)0.03m/s
    Inertial navigation accuracy<5%×driving distance (no GNSS signal)
    Observation accuracy (RMS)BDSGPSGLONASSGalileo
    B1/L1 C/A/E1 code10cm10cm10cm10cm
    B1/L1/E1 carrier phase1mm1mm1mm1mm
    B2/L2P(Y)/L2C/E5b code10cm10cm10cm10cm
    B2/L2P(Y)/L2C/E5b carrier phase1mm1mm1mm1mm
    B3/L5/E5a code10cm10cm10cm10cm
    B3/L5/E5a carrier phase1mm1mm1mm1mm
    Physical properties
    Operating temperature-55°C~+85°C
    Storage temperature-55°C~+95°C
    Humidity95% non-condensing
    VibrationGJB150.16-2009, MIL-STD-810
    ShockGJB150.18-2009, MIL-STD-810
    Hardware interface2×30 surface mount
    Electrical index
    Voltage ripple100mV p-p(max)
    LNA power output4.75~5.0V, 0~100mA
    Power consumption1.8W (typical)
    Function interface
    3xUART (LVTTL), 1x1PPS (LVTTL), 1xEvent, 1xSPI, 1x I2C

    Application Techniques

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