New Broadcast RTK Corrections over Satellite Radio Enable On-Road Autonomy - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

New Broadcast RTK Corrections over Satellite Radio Enable On-Road Autonomy

The SiriusXM satellite radio network now broadcasts GNSS corrections from Trimble’s RTX service. New cars sold in the contiguous U.S. and Canada equipped with SiriusXM’s Gen8 satellite chipset will be able to receive RTX GNSS corrections, without the need to access a cellular network, thus enabling high-accuracy positioning, a key component of autonomous on-road applications.

Trimble RTX provides sub lane-level accuracy for passenger vehicles on the road. With the addition of the Trimble RTX Auto software library, any new vehicle that receives SiriusXM broadcasts with a Gen8 satellite chipset can leverage a positioning solution suited for advanced driving assistance systems (ADAS), autonomous driving (AD) and vehicle-to-everything (V2X) applications.

Since the SiriusXM hardware is already installed in most new vehicles, automotive OEMs can avoid the cost of additional hardware to receive GNSS positioning corrections.

Trimble RTX technology is also component of General Motors’ Super Cruise system, a hands-free driving assistance system for the highway. To date, Super Cruise and Trimble RTX have enabled over 5 million miles of hands-free driving on America’s roadways.

The RTX Auto software library is Automotive Safety Integrity Level B (ASIL-B) certified and developed using the Automotive SPICE process maturity framework (Software Process Improvement and Capability Determination – ISO 15504). The RTX network operation is certified according to ISO 20000 standards, providing further peace of mind for any industry deploying safety-critical applications.

Trimble RTX technology provides real-time, multi-constellation correction of GNSS observations for more precise position estimates. Standard GPS signals can drift up to 25 feet, which could cause incorrect lane identification. When used in conjunction with high-definition maps, cameras, radar and inertial sensors, Trimble RTX provides lane-level positioning performance for semi-autonomous and autonomous vehicles.

According to the companies, car manufacturers now have an alternative means to bring high-precision GNSS into their vehicles, accelerating the adoption of real-time positioning in connected vehicles, and ultimately supporting safety-critical V2X applications.

SiriusXM Connected Vehicle Services, found in many makes and models from various manufacturers, affords access to a suite of safety, security, and convenience services including automatic crash notification, enhanced roadside assistance, remote door unlock, remote start, stolen vehicle recovery assistance, turn-by-turn navigation, integration with smart home devices and more.

Trimble Autonomy is developing a robust suite of solutions, which include GPS/GNSS, truthing, inertial, dead-reckoning, machine control, sensor fusion and more.