Module

BDS/GPS/GLONASS/Galileo/QZSS

Full-system, full-frequency RTK/INS integrated navigation module

UM981 is a new generation of BDS, GPS, GLONASS, Galileo, QZSS full-system, full-frequency RTK/INS integrated navigation module independently developed by Hexinxingtong. It is based on the new generation of radio frequency baseband and high-precision algorithm integrated GNSS independently developed by Hexinxingtong. SoC chip—NebulasIV design. It can simultaneously track all system and frequency points such as BDS, GPS, GLONASS, Galileo, QZSS, NavIC, SBAS, etc. Integrated high-speed floating-point processor and RTK dedicated co-processor to achieve 100 Hz positioning result output. Integrating the onboard MEMS chip and U-Fusion combined navigation algorithm, it effectively solves the problem of interruption of positioning results due to loss of satellite signal lock, and can provide continuous high-quality positioning in complex environments such as buildings, tunnels, viaducts, and tree shades. Positioning results. For high-precision navigation and positioning fields such as surveying, mapping, precision agriculture, etc.

Key Features

2018-07-16

Based on the latest generation NebulasIV radio frequency baseband and high-precision algorithm integrated GNSS SoC chip

2018-07-16

System-wide multi-frequency RTK engine and Gypsophila RTK technology

2018-07-16

Instantaneous RTK initialization technology

2018-07-16

60 dB narrowband anti-interference technology, supports interference detection

2018-07-16

Support Heading2 orientation technology

2018-07-16

Support STANDALONE single station high-precision positioning

2018-07-16

Support B2b-PPP and E6-HAS

2018-07-16

Onboard MEMS integrated navigation supports U-Fusion tight integrated navigation technology to meet positioning continuity in the event of satellite loss

Specifications

Technical Parameters

signal tracking
Channel	1408 channels, based on NebulasIV
Frequency Range(MHz)	BDS B1I, B2I, B3I, B1C, B2a, B2b GPS L1C/A, L1C, L2C, L2P(Y), L5 GLONASS G1, G2, G3 Galileo E1, E5a, E5b, E6* QZSS L1, L2, L5 NavIC L5 SBAS L1C/A
time characteristics
Cold start	＜30S
Precision
Timing accuracy	20ns
Standard single point positioning accuracy	H≤1.5m,V≤ 2.5m (1a,PDOP≤4)
Speed measurement accuracy	≤0.03m/s (RTK fixed solution, 1a)

RTK initialization time	<5s(D<10km)
RTK initialization confidence	>99.9%
RTK Precision	H:±(8+ 10xD) mm V:±(15+ 10x D) mm
Electrical properties
Supply voltage	+3.3V to +3.45V DC
Power consumption	0.95W
Data Format
Differential Data	NMEA 0183, Unicore
Hardware interface	3 × UART (LVTTL) 1 × SPI* 1 × I2C* 1 × CAN* (shared with UART3)
Weight（g）	<1.91g
Dimension	17.0 × 22.0 × 2.6 mm
encapsulation	LGA 54 pin
Environment Specifications
Operating Temperature (℃)	-40～+85
Storage Temperature (℃)	-55～+95