The accuracy of Unicore GNSS receivers ranges all the way from meter, though sub-meter and centimeter, down to the millimeter level.

Using our own unique technology Unicore has successfully developed and fielded series of multi-system, multi-frequency, high-performance System on a Chip (SoC), and a range of high-precision, board-level GNSS receivers and navigation/timing modules.

Applications include Continuously Operating Reference System (CORS) reference stations, survey & mapping, precision agriculture, positioning & heading, vehicle monitoring, autonomous vehicle navigation, and precision timing – along with a number of other

Unicore is a one-stop provider of GNSS SoC chips and GNSS receivers, with extensive experience in the design, verification, development, implementation and production of highly integrated ICs, along with multi-system high-performance GNSS baseband algorit

Unicore Communications, Inc. is a technology company focused on the design & development of highly integrated ICs, algorithms and GNSS receivers.

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UM440

BDS/GPS/GLONASS/Galileo High precision RTK Module

BDS/GPS/GLONASS/Galileo High precision RTK Module

UM440 is the low cost high precision RTK module developed by Unicore Communications, targeting agriculture, drones, GIS market, etc. By employing a single UC4C0 (432 channel tracking) baseband chip and a single RF chip, using single-sided SMD packaging, UM440 achieve cost effective high precision performance. It can simultaneously track GPS L1/BDS B1/GLONASS L1/Galileo E1. Under 10km baseline, UM440 can maintain excellent application experience in challenging environments such as urban canyons, by deploying anti-interference function block and on board MEMS device.

Product Characteristics

• Support GPS L1 +GLONASS L1+BDS B1+Galileo E1
• 30 × 40mm, high precision RTK module
• Support antenna signal detection
• 20Hz RTK update rate
• Adaptive recognition of RTCM input data format
• On board MEMS integrated navigation, support improved U-Fusion integrated navigation algorithm
• SMD packaging

Data Manual

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Technical Index

PerformanceSpecifications

Channel

432 channels,
bases on Nebulas-II chip

Velocity Accuracy(RMS) 0.03m/s

Frequency

GPS L1
BDS B1
GLONASS L1
Galileo E1

Time accuracy (RMS) 20ns
Heading accuracy(RMS) 0.2 degree/1m baseline
Time to First Fix (TTFF) Cold start<45s
Initialization Time <10s (typical)

Single Point Positioning (RMS)

Plane:1.5m

Initialization Reliability >99.9%

Elevation:3.0m

Reacquisition <1s

DGPS(RMS)

Horizontal:0.4m

Correction
RTCM 2.x /3.x

Vertical:0.8m

Data output NMEA-0183,
Unicore Binary

RTK(RMS)

Horizontal:1cm+1ppm

Update Rate 20Hz

Vertical:1.5cm+1ppm

Power Consumption 0.7W

OperatingConditions

Parameter Symbol Min. Typical Max Unit
Power Supply (VCC) Vcc 3.0 3.3 3.6 V
Peak Current Iccp     8.8 A
Voltage Input Low
Vin_low_1 -0.3   VCC x 0.3 V
Voltage Input High Vin_high_1 VCC x 0.7
  VCC + 0.3
V
Voltage Output Low Vout_low
0   0.45 V
Voltage Output High Vout_high VCC - 0.45   VCC V
Noise Figure Nftot 2.5 3.3 3.5 dB
LNA ANT1_PWR 3.0 5 5.5 V

FunctionalPorts

3x UART, 1xI2C, 1x SPI (LV-TTL)
1x PPS(LV-TTL)
1x Event input

PhysicalSpecifications

Size 30 × 40 × 4 mm
Weight 8g
Temperature Humidity
Working :-40°C~+85°C
Storage:-55°C~+90°C
Vibration 95% No condensation
Shock GJB150.16-2009,MIL-STD-810
GJB150.18-2009,MIL-STD-810

Application Area