Swegeo GD21D-INS
Dual Antenna GNSS/INS Receiver Board
Key Feature
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.
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 Ensure 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.
Driverless Car Systems & ADAS Development:
The GD21D-INS board is an excellent fit for autonomous driving and advanced driver-assistance system (ADAS) prototypes. Automotive engineers integrate this board into test vehicles to provide continuous, real-time position and full 3D attitude (heading, pitch, roll) information. In city driving tests, when tall buildings or tunnels interfere with GNSS signals, the board’s deeply-coupled IMU keeps the vehicle’s navigation accurate – steering systems and lane-centering features continue to operate smoothly. Its advanced anti-jamming ensures the car’s positioning isn’t thrown off by urban RF noise or deliberate signal interference.
High-Precision Drone Navigation:
Drone manufacturers who need rock-solid navigation under all conditions leverage the GD21D-INS. For large UAVs conducting survey missions or delivering goods, this board offers an integrated solution where the GNSS provides precise coordinates and the INS maintains the drone’s trajectory through brief GNSS dropouts (e.g., when banking hard or flying under an obstacle). The result is consistent, accurate flight paths. The board’s ability to output reliable orientation and position in real time helps with camera stabilization on mapping drones and improves the quality of data collection (since the drone’s exact attitude is known for each photo or sensor reading).
Survey & Mapping Base Stations:
The GD21D-INS isn’t just for moving platforms – survey teams can also set it up as a resilient reference station in challenging areas. For example, in open-pit mines or urban construction sites with intermittent sky view, this board can serve as a base that outputs correction data and continues to provide a stable reference location thanks to its inertial coasting capability. Its Ethernet and versatile interface support also mean it can be integrated into networked infrastructure for real-time data streaming and time synchronization (via gPTP), which survey companies appreciate when establishing temporary RTK networks or monitoring systems on critical projects.
| Feature | Specification | Feature | Specification |
|---|---|---|---|
| Signal Support |
L-Band*: 3 channels, 1525~1559 MHz BDS-2: B1I, B2I, B3I BDS-3: B1I, B1C*, B2a, B2b (PPP)* GPS: L1 C/A, L1C*, L2, L5 GLONASS: G1, G2 Galileo: E1, E5a, E5b, E6 (HAS)* QZSS: L1 C/A, L1C, L2, L5, L6 (CLAS)* NavIC: L5 SBAS*: L1 C/A |
Channels | 1507 Channels |
| Horizontal Accuracy (RMS) | Single Point: 1.5 m RTK: 1 cm + 1 ppm |
Vertical Accuracy (RMS) | Single Point: 2.5 m RTK: 1.5 cm + 1 ppm |
| Timing Accuracy | 20 ns (RMS) | Velocity Accuracy | 0.03 m/s (RMS) |
| RTK Initialization | ≤ 15 s | Re-acquisition Time | ≤ 1 s |
| Dead Reckoning Accuracy | 0.8 % | GNSS Data Update Rate | 10 Hz (Observation + Position) |
| Cold Start | ≤ 30 s | Hot Start | ≤ 5 s |
| System Functional Safety | ASIL B | Dimensions | 71.1 × 45.7 × 1.62 mm |
| Input Voltage | 3.3 V DC | Connectors |
RS232 × 2 USB × 1 Bluetooth (Long Range SPP) |
| Operating Temperature | −40°C to +85°C | Storage Temperature | −55°C to +150°C |
| Humidity | 5% – 95% (non-condensing) | Vibration / Shock | JESD22-B103 / JESD22-B110 |
| IMU (GD21-INS only) | |||
| Gyroscope |
Measure Range: ±300 °/s Angle Random Walk: 0.5 °/√h Bias Instability: 5 °/h Bias: 0.3 °/s Scale Error: 4‰ Cross Coupling Error: 1.7‰ (0.1°) |
Accelerometer |
Measure Range: ±16 g Velocity Random Walk: 0.3 m/s/√h Bias Instability: 50 μg Bias: 5 mg Scale Error: 2‰ Cross Coupling Error: 0.9‰ (0.05°) |
Swegeo GD21D-INS
Dual Antenna GNSS/INS Receiver Board
Key Feature
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.
OVERVIEW
Multi-Constellation GNSS Support
Provides reliable and robust signal reception from GPS, GLONASS, Galileo, and
BeiDou systems, ensuring comprehensive coverage and improved accuracy.
Dual Antenna Configuration
Enhances positioning accuracy and performance, particularly in challenging
environments, by using two antennas to better mitigate signal obstructions and
multipath effects.
USE CASES
Driverless Car Systems & ADAS Development:
The GD21D-INS board is an excellent fit for autonomous driving and advanced driver-assistance system (ADAS) prototypes. Automotive engineers integrate this board into test vehicles to provide continuous, real-time position and full 3D attitude (heading, pitch, roll) information. In city driving tests, when tall buildings or tunnels interfere with GNSS signals, the board’s deeply-coupled IMU keeps the vehicle’s navigation accurate – steering systems and lane-centering features continue to operate smoothly. Its advanced anti-jamming ensures the car’s positioning isn’t thrown off by urban RF noise or deliberate signal interference.
High-Precision Drone Navigation:
Drone manufacturers who need rock-solid navigation under all conditions leverage the GD21D-INS. For large UAVs conducting survey missions or delivering goods, this board offers an integrated solution where the GNSS provides precise coordinates and the INS maintains the drone’s trajectory through brief GNSS dropouts (e.g., when banking hard or flying under an obstacle). The result is consistent, accurate flight paths. The board’s ability to output reliable orientation and position in real time helps with camera stabilization on mapping drones and improves the quality of data collection (since the drone’s exact attitude is known for each photo or sensor reading).
Survey & Mapping Base Stations:
The GD21D-INS isn’t just for moving platforms – survey teams can also set it up as a resilient reference station in challenging areas. For example, in open-pit mines or urban construction sites with intermittent sky view, this board can serve as a base that outputs correction data and continues to provide a stable reference location thanks to its inertial coasting capability. Its Ethernet and versatile interface support also mean it can be integrated into networked infrastructure for real-time data streaming and time synchronization (via gPTP), which survey companies appreciate when establishing temporary RTK networks or monitoring systems on critical projects.
APPLICATIONS
TECHNICAL SPECIFICATIONS
| Feature | Specification | Feature | Specification |
|---|---|---|---|
| Signal Support |
L-Band*: 3 channels, 1525~1559 MHz BDS-2: B1I, B2I, B3I BDS-3: B1I, B1C*, B2a, B2b (PPP)* GPS: L1 C/A, L1C*, L2, L5 GLONASS: G1, G2 Galileo: E1, E5a, E5b, E6 (HAS)* QZSS: L1 C/A, L1C, L2, L5, L6 (CLAS)* NavIC: L5 SBAS*: L1 C/A |
Channels | 1507 Channels |
| Horizontal Accuracy (RMS) | Single Point: 1.5 m RTK: 1 cm + 1 ppm |
Vertical Accuracy (RMS) | Single Point: 2.5 m RTK: 1.5 cm + 1 ppm |
| Timing Accuracy | 20 ns (RMS) | Velocity Accuracy | 0.03 m/s (RMS) |
| RTK Initialization | ≤ 15 s | Re-acquisition Time | ≤ 1 s |
| Dead Reckoning Accuracy | 0.8 % | GNSS Data Update Rate | 10 Hz (Observation + Position) |
| Cold Start | ≤ 30 s | Hot Start | ≤ 5 s |
| System Functional Safety | ASIL B | Dimensions | 71.1 × 45.7 × 1.62 mm |
| Input Voltage | 3.3 V DC | Connectors |
RS232 × 2 USB × 1 Bluetooth (Long Range SPP) |
| Operating Temperature | −40°C to +85°C | Storage Temperature | −55°C to +150°C |
| Humidity | 5% – 95% (non-condensing) | Vibration / Shock | JESD22-B103 / JESD22-B110 |
| IMU (GD21-INS only) | |||
| Gyroscope |
Measure Range: ±300 °/s Angle Random Walk: 0.5 °/√h Bias Instability: 5 °/h Bias: 0.3 °/s Scale Error: 4‰ Cross Coupling Error: 1.7‰ (0.1°) |
Accelerometer |
Measure Range: ±16 g Velocity Random Walk: 0.3 m/s/√h Bias Instability: 50 μg Bias: 5 mg Scale Error: 2‰ Cross Coupling Error: 0.9‰ (0.05°) |