Can I use my existing SBAS-capable GNSS equipment for testing?

For L1 Legacy testing, existing GNSS equipment can be used, provided it is compliant with the DO-229D Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airborne Equipment standard. Some receivers may need a firmware upgrade. See the list of the receivers that have been successfully tested here. For DFMC and PPP testing, additional equipment and software will be required to decode the new signals at this time.


Is the PPP signal transmitted on L5 only or on both L1 and L5?

The PPP signal is being transmitted through the L1 and L5 frequencies. In both cases it is a dual-frequency PPP message.


What is the PRN number of the new SBAS Service?

PRN 122 is used for the Australia and New Zealand SBAS service.


Which devices can be used to track the L1 Legacy Service?

Most GNSS chipsets out there should be able to track the L1 legacy SBAS, including those in the latest Android and iOS smartphones, trackers, GPS watches and more. Refer to the technical specifications of your device to see whether SBAS capability is mentioned.


What messages are used to transmit the SBAS signals?

SBAS L1 signal is transmitted over L1 frequency using the MOPS RTCA DO 229D standard

Document Number: DO-229D
Issue Date: 12/13/2006
Committee: SC-159
Link to standard


DFMC signal is broadcast over the L5 frequency using messages types defined in the DFMC ED-259 MOPS

Document Number: ED-259 MOPS
Issue Date: 28/02/2019
Committee: EUROCAE Working Group 62 “Galileo”
Link to standard