GPS GNSS module K902

GLONASSQZSSADR

The K902 integrates the QC7820 SoC and an onboard IMU to provide seamless RTK positioning through GNSS/INS fusion, designed for intelligent driving, UAVs, robotics, surveying & mapping, and digital construction.

Key features

• Multi-constellation support: GPS, BDS-2, BDS-3, GLONASS, GALILEO, NAVIC, QZSS and SBAS.
• RF & BB integrated high-precision QC7820 GNSS SoC chip delivering centimeter-level positioning.
• Brand new dual-core CPU architecture for enhanced processing performance.
• Support for PPP-B2b and PPP-HAS services for precise positioning.
• Onboard high-precision IMU enabling GNSS+INS navigation and continuous positioning during GNSS outages.
• Multi-interface support including CAN and Ethernet for industrial communication and high-speed data exchange.

Caractéristiques / Spécifications techniques

• Performance
  • Channels: 1688
  • Signal tracking: GPS: L1C/A, L2P, L2C, L5, L1C; BDS-2: B1I, B2I, B3I; BDS-3: B1I, B3I, B1C, B2a, B2b; GLONASS: G1, G2, G3*; Galileo: E1, E5b, E5a, E5 AltBoC*, E6c*; QZSS: L1C/A, L2C, L5, L1C; SBAS: L1C, L5/A; NAVIC*: L5. (Items marked * supported only by specific firmware.)
  • Cold start: < 20 s (Adding Acceleration Capture Module)
  • Hot start (with RTC): < 10 s (typical)
  • Signal reacquisition: < 1 s
  • RTK initialization time: < 5 s (D < 10 km)
  • Initialization reliability: > 99.9%
  • Velocity accuracy: ≤ 0.02 m/s
  • Time accuracy: 20 ns
  • PPP convergence time: < 15 min
  • Post processing: 2.5 mm + 1 ppm Horizontal; 5 mm + 1 ppm Vertical
  • Single baseline RTK: 8 mm + 1 ppm Horizontal; 15 mm + 1 ppm Vertical
  • DGPS: < 0.4 m RMS
  • SBAS: 1 m 3D RMS
  • Standalone: 1.5 m Horizontal; 3 m Vertical
  • PPP: 0.1 m Horizontal; 0.2 m Vertical
  • ADR position error: < 3% of distance travelled without GNSS
• Physical
  • Size (W × L × H): 17 mm × 22 mm × 2.5 mm
  • Weight: 1.9 g
  • Hardware interface: LGA 54 pin
  • Power consumption: 0.4 W (anti-interference off)
  • Input voltage: +3.3 V ± 5% DC
  • Working temperature: -40 °C to +85 °C
  • Storage temperature: -55 °C to +125 °C
  • LNA power (external): +3.3 V ~ +5 V ± 5% VDC @ 0-100 mA
  • LNA gain: 20 ~ 35 dB (suggested)
  • Impedance match: 50 Ω
• Communications
  • UART: 2 ports
  • UART3 or CAN (optional): 1
  • PPS: 1
  • EVENT: 1
  • I2C: 1
  • SPI: 1
  • ETH: 1 (corresponding pins: 24, 25, 28, 29)
  • Correction data I/O: RTCM 2.X, 3.X
  • Position data output: ASCII (NMEA-0183): GGA, GSA, GSV, RMC, HDT, VHD, ZDA, VTG, GST, GLL; Binary: ComNav Binary
  • Position output rate: 1 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz* , 50 Hz*
  • IMU data rate: 1 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz* , 50 Hz* , 100 Hz*
• Inertial Sensor
  • Gyroscope: Range ±125 °/s; Bias repeatability 0.5 °/s; Bias stability 5 °/h; Angular Random Walk 0.12 °/√h
  • Accelerometer: Range ±2 g; Bias repeatability 20 mg; Bias stability 50 μg; Velocity Random Walk 0.07 m/s/√h

Note: Items marked with * are supported only by specific firmware.