UM982 RTK GNSS Raspberry PI HAT

UM982 dual channel all-constellation multi-frequency high precision RTK GNSS receiver.

UM982 is Unicore’s new-generation proprietary high-precision RTK positioning and heading module based on the Nebulas IV SoC which integrates RF, baseband and high-precision algorithm. Its main and secondary antenna inputs can simultaneously track multiple frequencies of all GNSS systems, and the module can perform on-chip RTK positioning and dual-antenna heading calculations. The built-in multi-frequency anti-jamming technology enhances RTK calculation on multiple modes and frequencies, which significantly improves RTK initialization time, measurement accuracy and reliability in complex environments such as city blocks and tree shades. Featuring the extraordinary positioning performance and reliability, UM982 is a perfect choice for high-precision navigation and positioning applications, such as UAV, autonomous machine and precision agriculture. Board can be used for a Base, Rover or Heading operation mode.

UM982 supported by PX4 Autopilot, Ardupilot, AgOpenGPS and other software, supporting GPS for Yaw aka Moving Baseline.

HAT features:

• Raspberry PI 40 pin extension header, supports all Raspberry PI compatible boards and Jetson Nano
• USB C connector
• Antenna input with IPEX connector
• On board low noise 3.3 V voltage regulator
• On board voltage level translators for 5V compatibility
• Time pulse LED, Power LED, RTK LED and GEO LED
• ELT_RtkBase full-featured software 
• UPrecise Unicore Evaluation Software
• Extensive visualization and evaluation features
• Backup supercapacitor
• Supports onboard battery holder for ML1220 rechargeable cell for long backup applications
• Dimensions 65x30.5x10 mm
• Fully assembled and ready to use
• ELT_RTKBase User Guide

UM982 module features:

• Based on the new generation GNSS SoC - NebulasIV, which integrates RF, baseband, and high precision algorithm
• 16.0 x 21.0 x 2.6 mm LGA package
• Supports all-constellatiion multi-frequency on-chip RTK positioning and dual-antenna heading solution
• Supports GPS L1/L2/L5, BDS B1I/B2I/B3I, GLONASS G1/G2, Galileo E1/E5a/E5b and QZSS L1/L2/L5
• All-system multi-frequency RTK engine and advanced RTK technology
• Dual-RTK technology
• Adaptive recognition of RTCM format differential data
• Independent tracking of different frequencies and advanced anti-jamming technology

Performance Specifications:

• Channels: 1408 channels, based on NebulasIV

Frequency

• GPS L1C/A/L2P (Y)/L2C/L5
• BDS B1I/B2I/B3I
• GLONASS G1/G2
• Galileo E1/E5a/E5b
• QZSS L1/L2/L5

Single point positioning (RMS):

• Horizontal: 1.5 m
• Time Accuracy(RMS) - 20 ns
• Vertical: 2.5 m
• Velocity Accuracy (RMS) - 0.03 m/s

DGPS (RMS):

• Horizontal: 0.4 m
• Cold start < 30 s
• Vertcal: 0.8 m
• Initialization Time < 5 s (typical)

RTK (RMS):

• Horizontal: 0.8 cm + 1 ppm
• Initialization Reliability > 99.9%
• Vertical: 1.5cm + 1 ppm
• Data Update Rate 20 Hz raw data

• Differential Data - RTCM V3.X
• Data Format - NMEA-0183, Unicore

Physical Characteristics:

• Packaging: 48 pin LGA
• Dimension: 16.0 × 21.0 × 2.6 mm
• Weight: 1.82 ± 0.03 g

Environmental Specifications:

• Working temperature: -40 °C ~ +85 °C
• Storage temperature: -55 °C ~ +95°C
• Humidity: 95% No condensation
• Vibration: MIL-STD-810F
• Shock: MIL-STD-810F

Communication Interfaces:

• 3 × UART (LVTTL)
• 1 × I2C*
• 1 × SPI* (slave)
• 1 × CAN* (shared with UART3)

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

• Antenna for RTK BASE station which perfectly suitable with this module.
• Ultra Light Helix Antenna for drone
• UM982 Product Brief
• UM982 User Manual
• Unicore NebulasIV Commands Reference Manual