DATASHEET:
Overview
The UM981 is Unicore’s new-generation proprietary high-precision positioning, based on the Nebulas IVTM SoC. The UM981 simultaneously tracks multiple frequencies of all GNSS systems, enabling the module to output high-precision RTK positioning.
Driven by a full-constellation, full frequency RTK engine, an RTK algorithm taking advantage of triple and quad-frequency observables, the UM981 effectively mitigates ionosphere residuals, delivering a fast time to first fix.
With built-in advanced anti-interference technology, the UM981 ensures delivery of reliable and accurate positioning data, even in complex electromagnetic environments.
Featuring extraordinary positioning performance and stability, UM981 is a perfect choice for high precision surveying and positioning applications.
Features
- Latest generation GNSS SoC – Nebulas IVTM, with integrated RF, baseband, and high precision processing algorithm’s
- Small 17 x 22 x 2.6 mm surface-mount package
- All-system multi-frequency RTK engine with advanced “Instantaneous RTK Initialization Technology”
- Low power-consumption of ~480mW
- Supports GPS L1/L2/L5, GLONASS L1/L2/L3, Galileo E1/E5a/E5b, BeiDou B1I/B2I/B3I/B1C/B2a/B2b, QZSS L1/L2/L5, SBAS
- On-board MEMS sensor for accurate tilt measurement of up to 30° for use in the surveying industry
- “RTK KEEP” technology for extended precision positioning after loss of base-station corrections
Applications
- Intelligent Driving
- Surveying and Mapping
- Precision Agriculture
- Robotics
Technical Specifications
| Tracking | |
| Channels: | 1408 channels, based on NebulasIVTM |
| GPS: | L1C/A, L2P (Y), L2C, L5 |
| GLONASS: | G1, G2 |
| Galileo: | E1, E5a, E5b |
| BeiDou: | B1I, B2I, B3I，B1C，B2a,B2b |
| QZSS: | L1, L2, L5 |
| Performance | |
| Single Point Positioning (RMS): | Horizontal: 1.5m Vertical: 2.5m |
| Velocity Accuracy (RMS): | 0.03 m/s |
| Time Accuracy (RMS): | 20 ns |
| DGPS (RMS): | Horizontal: 0.4m Vertical: 0.8m |
| Cold Start: | <30 s |
| RTK (RMS): | Horizontal: 0.8cm + 1ppm Vertical: 1.5cm + 1ppm |
| Initialization Time: | <5 s (typical) |
| Initialization Reliability: | >99.9% |
| Physical | |
| Dimensions: | 17.0 mm x 22.0 mm x 2.6 mm |
| Weight: | 1.88 g |
| I/O Connectors: | 54 pin LGA |
| Environmental | |
| Operating Temperature: | -40°C – +85°C |
| Storage Temperature: | -55°C – +95°C |
| Humidity: | 95% non-condensing |
| Vibration: | GJB150.16A-2009, MIL-STD-810F |
| Shock: | GJB150.18A-2009, MIL-STD-810F |
| Electrical | |
| Voltage: | 3.0~3.6VDC |
| Power Consumption: | 480mW (typical) |
Ordering
The UM981 high-precision GNSS RTK/INS module from Unicore is available through TerrisGPS. Please use the Request Pricing form to contact us for further information.
