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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UM442

GPS/BDS/GLONASS/Galileo High precision RTK and Heading Module

Product Introduction

UM442iscost efficienthighprecisionRTKand heading oduledevelopedbyUnicoreCommunications, Inc. By employingUnicore's new generation SOC chip Nebulas-II1,the UM442 could simultaneously track GPS, BDS, GLONASS, Galileo all systems. It also supports SBAS and QZSS.
Powered by Unicore“UGypsophila”RTK processing technology, UM442 tracks much more satellites and performs sufficient optimization on the multi-dimensional RTK matrix pipeline computation, resulting in much higher RTK processing capability.UM442 has on-board MEMS chip together with U-Fusion integrated navigation algorithm. It can achieve accurate and reliable positioning and attitude sensing, even in the most challenging environments such as urban canyons, tunnels etc.

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

Performance Specifications

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

Single Point Positioning (RMS)

Plane:1.5m

Heading accuracy(RMS) 0.2 degree/1m baseline

Elevation:3.0m

Time to First Fix (TTFF) Cold start<40s

DGPS(RMS)

Horizontal:0.4m

Initialization Time <5s (typical)

Vertical:0.8m

Initialization Reliability >99.9%

RTK(RMS)


Horizontal:1cm+1ppm

Reacquisition <1s

Vertical:1.5cm+1ppm

Correction
NMEA-0183,
Unicore Binary

Recapture

<1s

Data output RTCM 2.x /3.x

Initiation Time

<10s (Typical)

Update Rate 10Hz



Power Consumption 1.4W

Operating Conditions

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

Functional Ports

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

Physical Specifications

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