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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.

Home > Product Center > UM482


BDS/GPS/GLONASS/GALILEO All-system Multi-frequency High-precision Heading Module

Product Introduction

UM482 is an ultra-small, high precision positioning and heading module developed by Unicore Communications based on Nebulas II SoC. It supports GPS L1/L2, BDS B1/B2, GLONASS L1/L2, Galileo E1/E5b and SBAS satellite signals. Its targeted application fields include light-weight robot, UAV, intelligent driving, machine control etc.

Ultra-small multi-system multi-frequency high-precision positioning and heading module

UM482 employs a single Nebulas-II baseband chip and high integration and high precision RF chip. Due to a high integration and SMD packaging, it supports all constellations, multi frequencies and high precision, which significantly reduces the size of the terminal.

Nebulas-II GNSS SoC

UM482 is based on Unicore's Nebulas-II multi-system, multi-core, high precision SoC. It supports 432 channels, includes a built-in broadband ADC and an anti-interference unit, while the two 600MHz ARM processors and a special high-speed, floating-point operation CPU provide more powerful signal processing capabilities.

UGypsophila RTK processing technology

Coupled with a high-performance data-sharing capability and simplified operating system within the Nebulas II, UM482 performs sufficient optimization on the multi-dimensional RTK matrix computation. The receiver will try to track all visible satellites of all

systems to be used in the RTK and heading solutions, resulting in a shortened RTK initialization time of 5 seconds and improved accuracy and reliability.

Integrated MEMS Navigation

Integrated with a 6-axis MEMS, using mature U-Fusion algorithm, UM482 fixed positioning interruption when getting in tunnel, going through overpass, or in city canyons. UM482 can output continuous and reliable positioning and heading result even in tough environments. The board also supports options for odometer inputs to provide better navigation and positioning performance.


• 30*40 mm, ultra-small multi-system multi-frequency high precision module
• Nebulas-II System-on-a-Chip
• Supports BDS B1/B2+GPS L1/L2+GLONASS L1/ L2+GALILEO E1/E5b
• Simultaneous output of positioning and heading data
• 20 Hz RTK update rate
• Integrated 6-axis MEMS chip and capable of independent integrated navigation
• Supports both single and multi-system positioning
• Advanced multi-path mitigation technology
• Multiple physical interfaces including serial port, SPI, IPPS, Event

Data Manual

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Technical Index

Performance Specifications


432 channels, based on Nebulas-II GNSS SoC

Velocity Accuracy (RMS)




Time Accuracy (RMS)

20 ns
GPS L1/L2 Initialization time < 10 s (typical)
GLONASS L1/L2 Time to First Fix (TTFF) Cold start < 25 s
Galileo E1/E5b Initialization Time < 5 s(typical)
QZSS L1/L5 Initialization reliability > 99.9%

Single point positioning (RMS)

Horizontal:1.5 m


< 1 s

Vertical:2.5 m


RTCM v2.3/3.0/3.2


Horizontal:0.4 m

Data Output


Vertical:0.8 m


Horizontal:1 cm + 1 ppm

Update Rate

20 Hz

Vertical:1.5 cm+1 ppm

Inertial Navigation Accuracy

< 5% of distance travelled during GPS denied conditions

Physical Specifications


30 × 40 × 4 mm


2 x 30 pin, SMD

Antenna Input

2 x MMCX

Environmental Specifications


Working: - 40 ℃ ~ + 85 ℃

Storage: - 55 ℃ ~ + 95 ℃


95% No condensation





Electrical Specifications


3.3 VDC +5%/–3%

LNA Output

4.75~5.10 V, 0~100 mA

Ripple Voltage

100 mV p-p(max)

Power Consumption

2.0 W(typical)

Functional Ports




 1x SPI (LV-TTL)

Application Area