GALILEO GNSS module K902

GPSGLONASSQZSS

Introduction
K902 integrates the QC7820 SoC (ComNav) and an onboard IMU to deliver GNSS/INS fusion for RTK-level positioning. Designed for industrial applications such as intelligent vehicles, UAVs, robotics, surveying & mapping and digital construction, the module supports multi‑constellation tracking, advanced anti‑interference and multiple industrial interfaces including CAN and Ethernet.

Features

• Supports GPS, BDS‑2, BDS‑3, GLONASS, GALILEO, NAVIC, QZSS and SBAS
• RF & baseband integrated high‑precision GNSS SoC (QC7820)
• Dual‑core CPU architecture
• Supports PPP‑B2b and PPP‑HAS services
• GNSS+INS navigation with onboard IMU
• CAN and Ethernet communication options

Highlights

• QC7820 SoC technology — Full‑constellation tracking and centimeter‑level positioning using advanced floating‑point processing for demanding environments.
• Onboard IMU — High‑precision gyroscope and accelerometer enable GNSS/INS fusion and continuity of positioning during GNSS outages.
• Anti‑interference — Adaptive internal anti‑interference system with wideband reception, narrowband suppression and continuous‑wave rejection.
• Industrial interfaces — Integrated CAN and Ethernet provide reliable communication and high‑speed data transfer.

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 (with 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
• Operating 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
• UART3 or CAN (optional) 1
• PPS 1
• EVENT 1
• I2C 1
• SPI 1
• ETH 1 (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, 2, 5, 10, 20*, 50* Hz; IMU data rate: 1, 2, 5, 10, 20*, 50*, 100* Hz (items marked * supported only by specific firmware)

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

Specifications

• Model: K902
• SoC: QC7820 (ComNav)
• Supported constellations: GPS, BDS‑2/3, GLONASS, Galileo, NAVIC, QZSS, SBAS
• Channels: 1688
• RTK initialization < 5 s (D < 10 km)
• Positioning accuracy (single baseline RTK): 8 mm + 1 ppm H; 15 mm + 1 ppm V
• Post‑processing accuracy: 2.5 mm + 1 ppm H; 5 mm + 1 ppm V
• Form factor: LGA 54 pin; Size 17 × 22 × 2.5 mm; Weight 1.9 g
• Power: +3.3 V ±5% DC; Typical consumption 0.4 W (anti‑interference off)
• Interfaces: UART, CAN (optional), PPS, EVENT, I2C, SPI, Ethernet
• Operating temperature: -40 °C to +85 °C; Storage: -55 °C to +125 °C
• Onboard IMU: gyroscope and accelerometer specifications as listed above