Piksi Multi GNSS Module

Piksi Multi is a multi-band, multi-constellation RTK GNSS receiver that provides centimeter-level accuracy at a low cost. Being multi-band means fast convergence times measured in seconds, not minutes. Access to multiple satellite constellations improves availability, reliability and range between base and rover.

With Piksi Multi, you’ll benefit from faster system start times and reacquisition, critical to robotic systems. It’s easy to get started with a comprehensive Evaluation Kit.


  • Fast RTK convergence times measured in seconds, not minutes

  • Improve results with centimeter-accurate positioning

  • Open platform featuring powerful FPGA & dual core processor

  • UART, CAN, USB & Ethernet interfaces

  • Breakthrough price of $595

  • GPS L1/L2 and GLONASS G1/G2, BeiDou B1/B2, Galileo E1/E5b and SBAS

  • Small form factor compatible with common GNSS modules

  • Designed for rapid prototyping & ease of use

How is Piksi Multi an Improvement over the first-generation Piksi?

Swift’s original Piksi was the first low-cost RTK receiver to market. Its high accuracy, at a low price point, defined a new category of GNSS systems. Like all single-frequency systems, however, Piksi can take many minutes to achieve a high-accuracy fix which makes it unsuitable for challenging applications and environments. Piksi Multi, is an evolution of Piksi and was built from the ground up to meet the needs of demanding applications like autonomous driving. Piksi Multi improves availability, reliability and convergence times over the original Piksi, while maintaining Swift’s focus on best-in-class price and centimeter-level accuracy.

Fast Convergence & Reacquisition Times

Multi-band systems get into high-precision mode much faster than single band systems: seconds instead of minutes. The original Piksi typically took several minutes to achieve high-precision mode. Swift welcomed, and heard, its robotics customers’ feedback to make convergence times faster. Their systems could not wait minutes to start its mission or after encountering obstacles that obscured the sky, they needed to reacquire centimeter-accuracy quickly. Piksi Multi takes well under a minute (and typically only a few seconds!) to achieve high-precision mode, thanks to multi-band GNSS technology.


Convergence time in Piksi Multi is much faster than the original Piksi. Each satellite constellation sends down several positioning signals on different frequencies (or bands). Using GPS as an example, a single-band RTK system like Piksi only receives the most common L1 frequency. A multi-band system receives more frequencies: in the case of Piksi Multi, both the L1 and the L2 bands. Having access to multiple frequencies gives the system much more information about potential errors in positioning due to atmospheric interference. This greatly improves accuracy and reliability and allows lightning-fast convergence to high-accuracy RTK.


Swift has kept the centimeter-level accuracy that was the hallmark of the original Piksi product. As with all of our design decisions, this level of accuracy was driven by consistent customer feedback we received: 2 centimeters is great.

Multi-Constellation and Robust Hardware

Creating robust, reliable positioning using RTK GNSS requires a complex interplay of hardware and software technology. The original Piksi delivers open-sky positioning: when in very open environments, with few obstructions, it generates a high-precision position. Piksi Multi provides a generational leap in robust positioning performance over Piksi due to its multi-constellation hardware. Swift also incorporated advanced Microelectromechanical (MEMS) technology components into Piksi Multi to improve robustness and accuracy.

Satellite System Coverage

GPS is the global satellite navigation system built by the United States. There are now a total of four global systems including those built by Russia (GLONASS), China (BeiDou), and Europe (Galileo). There are also regional systems, such as Japan’s QZSS. The new Piksi Multi hardware supports simultaneous dual-band signal input from all of the above-mentioned systems, meaning that it has access to many more satellites than the original Piksi which makes for improved reliability.

In a GPS-only system, the typical number satellites received is fewer than 10. With Piksi Multi, you can receive data from dozens. To deliver robust RTK positioning performance in a variety of environments, more satellites means better and more available solutions. As constellations continue to come online, Swift will provide firmware updates so Piksi Multi users can access more satellites without a hardware swap-out. Users familiar with the original Piksi will find Piksi Multi to be an order of magnitude more robust in terms of solution reliability.