Swegeo GD21D-INS
Dual Antenna GNSS/INS Receiver Board
The Swegeo GD21D-INS board is designed to deliver high-precision navigation capabilities in a compact form factor. It features advanced anti-jamming technology with 65 dBc narrowband suppression and high-performance RTK for reliable positioning. The board offers a deeply-coupled combined navigation solution to address challenges such as satellite signal interference and multipath effects. It provides continuous, real-time, and accurate position and attitude information, making it ideal for applications including automated driving, drones, precision agriculture, surveying, and mapping.
Deeply-coupled Combined Navigation
Algorithm
Built-in with a MEMS IMU, it enables DR calculation, allowing continuous output of highprecision position and velocity information even in brief occlusion scenarios. It supports the deeply coupled combined navigation algorithm based on the Bynav Alice SoC, which improves the quality of GNSS observation. In environments like urban canyons, its positioning accuracy is 2 to 5 times better than loosely coupled algorithms.
Independent Intellectual Property Rights
The board is designed with unique technologies and innovations that are protected by intellectual property rights, ensuring proprietary and advanced functionalities.
Full Constellations and Full Frequency (1507 Channels)
The board supports tracking of all available GNSS constellations and operates across a wide range of frequencies with 1507 channels, ensuring comprehensive and precise positioning capabilities.
High-performance Anti-jamming
The board includes advanced anti-jamming technology that effectively minimizes the impact of signal interference, ensuring reliable performance even in environments with significant radio frequency noise.
Deeply-coupled Combined Navigation
The board offers a sophisticated navigation solution that combines multiple data sources for enhanced accuracy and robustness, addressing challenges such as satellite signal interference and multipath effects.
Built-in High-precision Functional Safety IMU, with 100% Full-Temperature Calibration
The board integrates a high-precision Inertial Measurement Unit (IMU) that has been fully calibrated across the entire temperature range. This ensures accurate and reliable sensor data under varying environmental conditions.
Support Ethernet Port, Embedded SDK Differential Account, Support gPTP Time Synchronization
The board features an Ethernet port for network connectivity, an embedded Software Development Kit (SDK) for differential corrections, and support for gPTP (general Precision Time Protocol) time synchronization, facilitating precise time-based applications.
AP Partition Design Ensures Stable and Reliable OTA Upgrades
The board is designed with an Application Processor (AP) partition that supports stable and reliable Over-The-Air (OTA) firmware upgrades, ensuring that updates can be applied seamlessly without disrupting operations.
| Channels | 1507 Channels |
| Signal Supported | L-Band*: 3 channles, 1525~1559 MHz, BDS-2:B1I, B2I, B3I,BDS-3:B1I, B1C*, B2a, B2b (PPP)*,GPS:L1 C/A, L1C*, L2, L5, GLO:G1, G2, GAL:E1, E5a, E5b, E6 (HAS)*,QZSS:L1 C/A, L1C, L2, L5, L6 (CLAS)*, NavIC L5, SBAS* : L1 C/A |
| Accuracy | Horizontal Positioning Accuracy Single Point 1.5 m (RMS) RTK 1 cm + 1 ppm (RMS) Vertical Positioning Accuracy Single Point 2.5 m (RMS) RTK 1.5 cm + 1 ppm (RMS) |
| IMU (GD21-INS only) | Gyroscope Measure Range (° /s) ± 300 Angle Random Walk ( ° /h) 0.5 Bias instability (° /h) 5 Bias (° /s) 0.3 Scale Error 4‰ Cross Coupling Error 1.7‰ (0.1° ) Accelerometer Measure Range (g) ± 16 Velocity random walk (m/s/ √ h) 0.3 Bias instability (μg) 50 Bias (mg) 5 Scale Error 2‰ Cross Coupling Error 0.9‰ (0.05° ) System Functional Safety* ASIL B |
| Data update rate | GNSS Observation 10 Hz GNSS Position Results* 10 Hz |
| Initialization / Time to first fix | Cold start ≤ 30 s Hot start ≤ 5 s |
| RTK performance | RTK Initialization RTK Solution Delay ≤ 15 Re-acqusition Time ≤ 1s DR Accuracy 0.8 % |
| Accuracy | Timing Accuracy 20 ns (RMS) Velocity Accuracy 0.03m/s (RMS) |
| Dimensions | 71.1 x 45.7 x 1.62 mm |
| Input voltage | 3.3V DC |
| Connectors | RS232 x 2, USB x 1 , Bluetooth(Long Range SPP) |
| Temperature | Operating temp. −40 °C to +85 °C Storage temp. −55 °C to +150 °C |
| Humidity | 5% - 95% (non-condensing) |
| Vibration/Shock | JESD22-B103 /JESD22-B110 |
