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UM681A GNSS Module

Category： UnicoreComm
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Product Description:

UM681A

Automotive Grade Multi-GNSS Dual-frequency High Precision RTK Positioning Module

The UM681A is a highly precise dual-frequency GNSS and INS integrated navigation module created by Unicore, specifically designed for the intelligent driving sector. Utilizing the proprietary multi-system dual-frequency high-performance SoC, UC6580A, this module offers the capability for multi-system dual-frequency joint positioning or single system standalone positioning, achieving centimeter-level accuracy.

APPLICATIONS

• Vehicle Navigation

Product Characteristics


• Supports concurrent operation of GPS, BDS, GLONASS and Galileo	• Provides high precision positioning service via standard interface
• Centimeter-level positioning accuracy & raw data output	• GNSS chip qualified according to AEC-Q100 and production process conforms to IATF16949
• Built-in MEMS, output of integrated navigation results with a single module, continuous positioning even in tunnels and underground parking lots.

Technical Specifications

Performance Specifications


	96 channels, based on UFirebirdII
Channel	GPS L1C/A, L5
	BDS B1I, B1C*, B2a
	GLONASS G1*
	Galileo E1, E5a
Frequency	NavIC L5*
	QZSS L1, L5
	SBAS L1C/A
	Single-system standalone positioning
Modes	Multi-system joint positioning
	Cold Start: ≤ 26 s
Time to First Fix (TTFF)	Hot Start: ≤ 2 s
	Re-acquisition : ≤ 2 s
DGPS (RMS)	Horizontal: 1.5 m (open sky)
	Vertical: 2.5 m (open sky)
RTK (RMS)	Horizontal: 1 cm + 1 ppm (open sky)
	Vertical: 1 cm + 1 ppm (open sky)
Positioning error of INS only< 1% of the driving distance without GNSS signals
Velocity Accuracy(RMS)¹	0.05 m/s
1PPS	20 ns
	BDS+GPS+GLONASS+Galile
	Tracking -162 dBm
Sensitivity	Cold start -147 dBm
	Hot Start -157 dBm
	Reacquisition -158 dBm
Data Update Rate	1 Hz / 5 Hz / 10 Hz
Correction	RTCM V3.X
Data Format	NMEA 0183, Unicore