Increasing GPS accuracy with EGNOS

Al Johnson openmoko at
Mon Oct 5 12:02:11 CEST 2009

On Sunday 04 October 2009, Erik Lundin wrote:
> Good news, indeed. Does the Neo FreeRunner support EGNOS signals? Both
> the hardware and software?

According to this the Antaris 4 is capable of using WAAS, EGNOS and MSAS, 
collectively known as SBAS, and the signal is received through the GPS 
antenna. By default it is enabled, with one search channel, although this can 
be configured through the ubx protocol. The status can also be shown in ubx 
messages. This is probably worth checking to see what is actually happening 
when in Europe, as when it was written EGNOS was in test mode, and its use was 
disabled by default. It is unclear whether this was because of a 'test mode' 
flag in the signal or hardcoding in the firmware.

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