GNSS Receiver

WGM-303 Series

WGM-303 is a highly sensitive GNSS receiver based on u-blox M8 chipset which is built-in antenna. You can use the GNSS Receiver in automotive navigation, security tracking purpose, map making and fleet management. Providing reliable positioning in difficult environments, meet even the most stringent requirements in versatile industrial and consumer applications, such as UAVs, vehicles (car, truck, bus etc.) and asset tracking. The optional connectors of USB and PS / 2 enable the connection with a laptop, car PC and other electronic devices. It compatible with Microsoft Windows 10, 8.1, 8, as well as 7, Vista.

  • 72-Channel High Performance u-blox M8 engine.
  • –167 dBm sensitivity for reliable positioning in challenging Conditions.
  • Extremely fast TTFF (Time To First Fix) at low signal level.
  • Support NMEA0183, RTCM2.0 (input only) protocol.


GNSS Receiver Type: 72-channel u-blox M8 engine, GPS/QZSS L1 C / A, GLONASS L10F, BeiDou B1I, Galileo E1B / C, SBAS L1 C / A: WAAS / EGNOS / MSAS / GAGAN
Sensitivity: Tracking & Navigation: -167 dBm, Reacquisition: -160 dBm, Hot Start: -157 dBm, Cold Start: -148 dBm
Antenna Type: Built in Patch Antenna
Protocol / Interface: NMEA0183, RTCM2.0(input only), USB / RS-232 / UART
Accuracy: 2.0m CEP (GPS / SBAS / QZSS+GLONASS)
Update Rate: Single GNSS Up to 18 Hz, 2 Concurrent GNSS Up to 10 Hz

Acquisition Time

Cold Start: 26 sec. (average)
Aided Starts: 2 sec. (average)
Reacquisition: 1 sec. (average)

Dynamic Conditions

Altitude: 50,000 meters max
Velocity: 500 meters / second max
Acceleration: Less than 4g


Main Power Input: WGM-303U: 5V (From USB), WGM-303P: 5V, WGM-303PW: 5~36V
Power Consumption: Acquisition 50 mA @5V, Tracking 45 mA @5V

Physical Characteristics

Dimension (L x W x H): 40 x 37 x 11 mm
Cable Length: 1.7 M
Operating Temperature: -40°C ~ +85°C