YX-OS28 UM982 GNSS/RTK Module with Base Board, High-Precision Centimeter-Level Positioning

The UM982 is an all‑constellation, multi‑frequency, high‑precision GNSS positioning and heading module built on the Nebulas IV™ baseband chip. Designed for professional drones, robotics, marine navigation, and autonomous systems, it delivers reliable RTK positioning and dual‑antenna heading in a compact SMD package.

With 1408 channels and support for BDS, GPS, GLONASS, Galileo, and QZSS, the UM982 locks onto all visible satellites across multiple frequencies. It includes advanced PPP services such as E6‑HAS, B2b‑PPP, and QZSS L6 (MADOCA), enabling centimeter‑level accuracy without a base station in many regions.

The dual‑antenna heading solution provides precise yaw, pitch, and roll for applications where magnetic compasses are unreliable. Dual‑RTK engine technology and adaptive RTCM input recognition ensure smooth integration with various correction sources.

Key Features

• Dual antenna input – Accurate heading without a compass
• All‑constellation, multi‑frequency – BDS B1I/B2I/B3I/B1C/B2b, GPS L1/L2/L5, GLONASS G1/G2, Galileo E1/E5a/E5b/E6, QZSS L1/L2/L5/L6, SBAS
• PPP services supported – E6‑HAS, B2b‑PPP, QZSS L6 (MADOCA)
• Dual‑RTK engine technology – Enhanced fix reliability and convergence speed
• Adaptive RTCM input format recognition – Automatic handling of different correction streams
• Compact SMD package – 16 mm × 21 mm × 2.6 mm for space‑constrained designs
• Multiple interfaces – UART (x3), I²C (x1), SPI (x1), CAN (x1)

Technical Specifications

Basic Information

Master Antenna Frequencies

Slave Antenna Frequencies (Heading)

Interfaces

Special Features

Note: For complete signal group details and command references, consult the Unicore Reference Commands Manual for N4 High Precision Products V2.