Al Johnson schrieb:
> On Sunday 04 October 2009, Erik Lundin wrote:
>> Good news, indeed. Does the Neo FreeRunner support EGNOS signals? Both
>> the hardware and software?
>
> http://www.u-blox.com/en/download-center.html?task=view.download&cid=83
>
> 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.
I found this in the source of ogpsd on my Freerunner:
def initializeDevice( self ):
# Use high sensitivity mode
#self.send("CFG-RXM", 2, {"gps_mode" : 2, "lp_mode" : 0})
# Enable use of SBAS (even in testmode)
self.send("CFG-SBAS", 8, {"mode" : 1, "usage" : 7, "maxsbas" : 3,
"scanmode" : 0})
So it seems that SBAS has always been enabled even in test mode. Does
anybody know where we can get information if sbas is really active and
used by the chip?
Christian
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