Trimble has launched a dual-frequency OEM GNSS receiver module that supports its RTX correction services for autonomous applications (writes Nick Flaherty).

The BD9250 has an industry-standard form factor of 71.1 x 45.7 x11 mm and a standard 28-pin pinout, to allow easy integration. The module weighs 55 g and supports all the major GNSS constellations, including GPS, Galileo, GLONASS, BeiDou, QZSS and NavIC. Support for the Indian NavICS-Band signal is also available withtheTrimbleBD9250s version.

The module has 336 tracking channels for multi-constellation GNSS support with multi-path mitigation and low-elevation tracking. Maxwell 7 technology in the module uses three signals from each satellite for more accurate positioning. It also uses onboard RF spectrum analysis to protect against spoofing and interference.

In addition, the module uses Trimble’s RTX correction subscription services to provide an accuracy to within 2 cm horizontally without the need for a base station. It also uses Trimble’s ProPoint positioning engine to improve the RTX performance in difficult conditions such as under canopies, highway overpasses and in dense urban areas, and uses sensor fusion to integrate the GNSS data with data from the IMU.

It is also compatible with generic RTK services that use a separate base station to send radio signals to provide greater positioning accuracy.

The receiver includes the ability to enable system integrators to choose between the L2 or L5 frequency bands to optimise signal performance and maximise the number of measurements available to the GNSS engine.

An Ethernet connector allows high-speed data transfer and configuration via standard web browsers. USB, CAN andRS-232 are also supported.