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UM981 GPS/BDS/GLONASS/Galileo/QZSS All-constellation Multi-frequency RTK/INS Integrated Positioning Module

Unicore's new-generation proprietary RTK/INS integrated navigation module. The module integrates a high-speed floating-point processor and an RTK-dedicated coprocessor, enabling it to output IMU raw data at 100Hz and RTK data at 50Hz, respectively. The on-board MEMS chip and algorithm ensure continuous, high-quality positioning results in GNSS denied environments such as buildings, tunnels, overpasses, and shaded areas. With its high precision and performance, the UM981 is well-suited for surveying and precision agriculture, among other applications.

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Product Description

Channel1408 channels, based on NebulasIV
Frequency

GPS L1C/A, L1C, L2C, L2P(Y), L5

BDS B1I, B2I, B3I, B1C, B2a, B2b

GLONASS G1, G2, G3

Galileo E1, E5a, E5b, E6

QZSS L1C/A, L1C, L2C, L5

NavIC L5

SBAS L1C/A

Single Point Positioning (RMS)

Horizontal: 1.5m

Vertical: 2.5m

DGPS (RMS)

Horizontal: 0.4m

Vertical: 0.8m

RTK (RMS)

Horizontal: 0.8cm+1ppm

Vertical: 1.5cm+1ppm

PPP（RMS）

Horizontal: 5cm

Vertical: 10 cm

Tilt Measurement10 mm + 0.7 mm/°tilt (accuracy < 2.5 cm within 30°)
Positioning Error of INS only< 5 % of the distance traveled without GNSS signals
Observation Accuracy (RMS)BDSGPSGLONASSGalileo
B1I/B1C/L1 C/A/G1/E1 Code10cm10cm10cm10cm
B1I/B1C/L1C/A/G1/E1 Carrier Phase1mm1mm1mm1mm
B2I/B2a/B2b/L5/E5a/E5b Code10cm10cm10cm10cm
B2I/L2P(Y)/L2C/G2/E5b Carrier Phase1mm1mm1mm1mm
B3I/B2a/E5a/L5 Code10cm10cm10cm10cm
B3I/B2a/E5a/L5 Carrier Phase1mm1mm1mm1mm
Time Accuracy (RMS)20 ns
Velocity Accuracy (RMS)0.03 m/s
Cold start< 12 s
Initialization time<5s (typical)
Initialization reliability>99.9%
Data Update Rate

100 Hz (IMU RAW Data)

50 Hz* (RTK)

Differential DataRTCM V3.X
Data FormatNMEA-0183, Unicore
Physical Characteristics
Packaging54 pin LGA
Dimension17.0 × 22.0 × 2.6 mm
Weight1.91 g ± 0.03 g
Environmental Specifications
Working temperature-40°C~+85°C
Storage Temperature-55°C~+95°C
Humidity95% No condensation
VibrationGJB150.16A-2009, MIL-STD-810F
ShockGJB150.18A-2009, MIL-STD-810F
Communication Interface

3 x UART (LVTTL)

1 x I2C*

1 x SPI*

1 × CAN* (shared with UART3)

Note: Items marked with * are only supported by specific firmware.


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Smart Industry
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Email

sales@toxutech.com

GPS RTK Antenna 18665803017 (Macro)

GPS RTK Antenna No.52, Xikeng Road, Xikeng community, Fucheng Street, Longhua District, 518110 Shenzhen city, Guangdong Province, China

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