• Beitian BT-980G1 GNSS RTK module board, top view with Type-C port and pin header
  • Beitian UM980 full-frequency RTK GNSS board set with antenna connector, top view comparison
  • Beitian full-system full-frequency UM980 module promotional graphic for GNSS RTK module
  • BT-980G1 RTK GNSS module product features chart with board image and parameter table
  • RTK GNSS module application scenario graphic showing surveying, precision agriculture and driving
  • Package contents list: BT-980G2 series module, 1.25mm 8-pin serial cable with lock, USB to Type-C
  • BT-980G1 product parameter sheet showing 66×45×10.9mm size and supported frequency ranges
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Beitian UM980/K902 Full-Frequency RTK GNSS Board for UAV Navigation, High-Precision BDS/GPS Module

Beitian UM980/K902 Full-Frequency RTK GNSS Board for UAV Navigation, High-Precision BDS/GPS Module

Beitian

$226.06 USD
$226.06 USD
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Overview

The Beitian UM980/K902 is a full-frequency RTK GNSS board for UAV navigation and other high-precision positioning applications. It integrates a GNSS module (UM980 or K902, depending on model) and supports multi-constellation reception such as BDS/GPS/GLONASS/Galileo/QZSS for centimeter-level RTK positioning and meter-level single-point positioning.

Key Features

  • Integrated GNSS chip options: UM980 or K902 (model-dependent)
  • RTK positioning (RMS):
    • K902 series: (Horizontality) (8+10-6xD)mm; (Verticality) (15+10-6xD)mm
    • UM980 series: Flat: 0.8 cm +1 ppm; Elevation: 1.5 cm +1 ppm
  • Single point positioning: Flat surface 1.5 m; Elevation 2.5 m
  • Time accuracy: 20 ns
  • Quickly enter RTK mode: initialization time is less than 5 s (typical value)
  • Update frequency:
    • K902 series: default 5 Hz
    • UM980 series: <=50 Hz (Default: 1 Hz)
  • Multiple connection methods shown: wired connection method and radio connection method (base/rover)
  • Adaptive anti-interference ability (suppresses interference signals of wide and narrow bands and continuous waves)
  • Supports multiple systems as stated: Windows, Linux, CE

Model Options

  • BT-980G1; BT-980G2; BT-980G3; BT-980G4
  • BT-980M1; BT-980M2; BT-980M3; BT-980M4
  • BT-902G1; BT-902G2; BT-902G3; BT-902G4
  • BT-902M1; BT-902M2; BT-902M3; BT-902M4

Specifications

K902 Series (models shown: BT-902G1 / BT-902G3 / BT-902M2 / BT-902M4)

Chip K902
Operating mode GPS: L1C/A, L2P, L2C, L5, L1C; BDS-2: B1I, B2I, B3I; BDS-3: B1I, B1C, B2a, B2b, B3I; GLONASS: G1, G2, G3*; Galileo: E1, E5B, E5a, E5, AltBOC*, E6c*; QZSS: L1C/A, L2C, L5, L1C; SBAS: L1C/A, L5; IRNSS*: L5
Single point positioning Flat surface: 1.5 m; Elevation: 2.5 m
RTK (RMS) (Horizontality): (8+10-6xD)mm; (Verticality): (15+10-6xD)mm
Time accuracy 20 ns
Speed accuracy 0.02 m/s
Update frequency The default is 5 Hz
Time to First Fix Cold Start 20 s; Hot Start (with RTC) 10 s
Output level TTL
Baud rate 115200 bps
Operational limits Altitude 18 km; Velocity <515 m/s
Voltage DC 3.6 V-5.5 V, typical: 5.0 V
Current 140 mA/5.0 V
Model Size Weight Connector Antenna connectors
BT-902G1 66*45*10.9mm 17 g 1*1.25/8P with lock, horizontal SMD socket; 1*USB port Type-C SMA-K
BT-902G3 44.7*30*10.9mm 13 g 1.25/8P lockable, horizontal SMD socket SMA-K
BT-902M2 66.35*45*5.6mm 17 g 1*1.25/8P with lock, horizontal SMD socket; 1*USB port Type-C MMCX-KW
BT-902M4 45.55*30*5.6mm 9.5 g 1.25/8P lockable, horizontal SMD socket MMCX-KW

UM980 Series (models shown: BT-980G2 / BT-980G4 / BT-980M1 / BT-980M3)

Chip UM980
Operating mode BDS B1I/B2I/B3I/B1C/B2a/B2b*; GPS L1C/A/L2P (Y)/L2C/L5; GLONASS L1/L2; Galileo E1/E5a/E5b/E6*; QZSS L1/L2/L5/L6*
Channels BT-980G2/BT-980G4: 1408 channels, based on; BT-980M1/BT-980M3: 184 search channels
Single point positioning Flat surface: 1.5 m; Elevation: 2.5 m
RTK (RMS) Flat: 0.8 cm +1 ppm; Elevation: 1.5 cm +1 ppm
Time accuracy 20 ns
Speed accuracy 0.2 m/s
Time to First Fix Cold start <20 s
Baud rate 4800bps - 921600bps, default 115200bps
Level TTL level
Update frequency <=50Hz* Default:1Hz
Voltage DC 3.6V-6.0V, typical: 5.0V
Current 180mA/5.0V
Model Size Weight Connector Antenna connectors
BT-980G2 73.1*45*11.3mm 18 g 1*1.25/8P lockable, horizontal SMD socket; 1*USB port Type-C SMA-KW
BT-980G4 52.3*30*11.3mm 13 g 1.25/8P lockable, horizontal SMD socket SMA-KW
BT-980M1 66*45*6mm 17 g 1*1.25/8P lockable, horizontal SMD socket; 1*USB port Type-C MMCX-K
BT-980M3 44.7*30*6mm 13 g 1.25/8P lockable, horizontal SMD socket MMCX-K

Board Layout / Interfaces (as labeled)

  • Type-C
  • Antenna interface (labeled twice)
  • Serial output (labeled multiple times)
  • Reserved interface
  • Indicator light
  • RTK module
  • Farad capacitance
  • Fixed hole position

RTK Connection (schematic shown)

  • Constellations shown: BDS / GPS / GLONASS / GALILEO
  • Modes shown: Radio connection method (external radio station) and Wired connection method
  • Base/Rover shown: Host Station (Base) and Slave Station (Rover)
  • Power supply shown: 5V > 1A (Source)
  • Signal labels shown: RX1, TX1, GND, VCC, RX2, TX2

What's Included

  • GNSS board/module (nomenon) x1
  • 1.25 8p with lock socket serial cable x1
  • USB to TYPE-C cable x1

Applications

  • Drones / UAV navigation
  • Driving test and driver training
  • Agricultural machinery navigation
  • Robots and intelligent driving systems requiring high-precision positioning

For model selection support and integration help, contact support@rcdrone.top or visit https://rcdrone.top/.

Details

Specification comparison chart for Beitian UM980 and K902 RTK GNSS board variants and sizesBeitian UM980/K902 full-frequency RTK GNSS board product lineup for high-precision positioning projects

Pick UM980 or K902 depending on your update-rate needs and integration space for UAV and robotics navigation builds.

UM980/K902 GNSS board functional block layout with labeled ports and RTK connection overviewRTK base-to-rover workflow diagram using BDS/GPS/GLONASS/Galileo satellites and correction link

RTK setups pair a base (reference) station with a rover receiver to deliver centimeter-level positioning when corrections are applied.

Wired and radio connection wiring diagram for RTK base station and rover with GNSS antennas and computer

Both wired and radio correction links are supported, making it easy to match your ground station and telemetry workflow.

Radio transmission concept graphic highlighting reference station, mobile station, and centimeter-level RTK accuracy

Centimeter-level RTK positioning improves guidance accuracy for autonomous vehicles, drones, and surveying workflows.

Quick RTK mode and multi-application infographic with 20s cold start, up to 50Hz, and antenna connectors

Fast initialization and flexible antenna connector options help streamline installs across UAVs, agriculture, and industrial platforms.

Adaptive anti-interference feature callout and development materials list for UM980/K902 GNSS moduleCompatibility graphic for Windows, Linux, and CE plus base/rover role switching and product displayPackage contents list with GNSS board, 1.25mm 8-pin lock serial cable, and USB to Type‑C cable

Included cables simplify bench setup, configuration, and serial communication during integration and testing.

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