Re: Increasing GPS accuracy with EGNOS
On Wednesday 21 October 2009, Ed Kapitein wrote:
Baruch Even wrote:
SNIP
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?
The comment is wrong, the mode value of 1 means that it uses SBAS but
not if its in test mode. The comment is a left over from the time the
value was 3, but then the whole line was commented out.
You can get SBAS status messages if you set it in the debug interface
with: mdbus -s org.freesmartphone.ogpsd /org/freedesktop/Gypsy
org.freesmartphone.GPS.UBX.SetDebugFilter NAV-SBAS True
and then listen to the signals with:
mdbus -l -s rg.freesmartphone.ogpsd /org/freedesktop/Gypsy
Look for DebugPacket signals.
I tried it for other signals, didn't have time yet to test if it works
for NAV-SBAS.
Baruch
I did to enable the debug packet and although i was receiving data from
PRN120, i never got any
NAV-SBAS packets in the debug output.
Acording to [1] it should be enabled in the framework, so i am wondering if
anyone had more luck than me.
I found the same as you, but probably forgot to report it. I believe the
reason is that by default the NAV-SBAS messages aren't enabled, and we don't
explicitly enable them in configuration. I didn't get round to checking the
message format required to enable it though.
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Re: Increasing GPS accuracy with EGNOS
Baruch Even wrote:
SNIP
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?
The comment is wrong, the mode value of 1 means that it uses SBAS but
not if its in test mode. The comment is a left over from the time the
value was 3, but then the whole line was commented out.
You can get SBAS status messages if you set it in the debug interface with:
mdbus -s org.freesmartphone.ogpsd /org/freedesktop/Gypsy
org.freesmartphone.GPS.UBX.SetDebugFilter NAV-SBAS True
and then listen to the signals with:
mdbus -l -s rg.freesmartphone.ogpsd /org/freedesktop/Gypsy
Look for DebugPacket signals.
I tried it for other signals, didn't have time yet to test if it works
for NAV-SBAS.
Baruch
I did to enable the debug packet and although i was receiving data from
PRN120, i never got any
NAV-SBAS packets in the debug output.
Acording to [1] it should be enabled in the framework, so i am wondering if
anyone had more luck than me.
Kind regards,
Ed
[1] http://totalueberwachung.de/blog/2008/10/12/status-of-the-framework
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Re: Increasing GPS accuracy with EGNOS
I'll try to check it too. I'll let you know. Mickael Al Johnson a écrit : On Monday 05 October 2009, Joseph Reeves wrote: This is probably worth checking to see what is actually happening when in Europe, Someone tell me what command to run on what distro and I'll let you all know... If it was going to be that easy I'd have done it myself ;-) AFAIK there isn't a simple ubx utility that would allow us to send parameters to the GPS and watch for the returning messages, so adding a few lines to ogpsd is probably the easiest approach. For anyone who knows their way around ogpsd and ubx it should be quick and easy ;-) I'm not that person, so if I get round to it it may take a little longer... 2009/10/5 Al Johnson openm...@mazikeen.demon.co.uk: 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.downloadcid=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. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Increasing GPS accuracy with EGNOS
On Mon, Oct 5, 2009 at 9:02 PM, Al Johnson openm...@mazikeen.demon.co.uk wrote: 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.downloadcid=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. Other GPS receivers seem to have switched over automatically - http://www.openstreetmap.org/user/kevjs1982/diary/8160 . ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Increasing GPS accuracy with EGNOS
Christian wrote:
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.downloadcid=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?
The comment is wrong, the mode value of 1 means that it uses SBAS but
not if its in test mode. The comment is a left over from the time the
value was 3, but then the whole line was commented out.
You can get SBAS status messages if you set it in the debug interface with:
mdbus -s org.freesmartphone.ogpsd /org/freedesktop/Gypsy
org.freesmartphone.GPS.UBX.SetDebugFilter NAV-SBAS True
and then listen to the signals with:
mdbus -l -s rg.freesmartphone.ogpsd /org/freedesktop/Gypsy
Look for DebugPacket signals.
I tried it for other signals, didn't have time yet to test if it works
for NAV-SBAS.
Baruch
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Re: Increasing GPS accuracy with EGNOS
Someone tell me what command to run on what distro and I'll let you all know... Oh, and somebody write a SISNeT application too ;-) http://www.egnos-pro.esa.int/sisnet/index.html 2009/10/5 Joseph Reeves iknowjos...@gmail.com: This is probably worth checking to see what is actually happening when in Europe, Someone tell me what command to run on what distro and I'll let you all know... 2009/10/5 Al Johnson openm...@mazikeen.demon.co.uk: 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.downloadcid=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. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Increasing GPS accuracy with EGNOS
On Mon, Oct 5, 2009 at 12:39 AM, Erik Lundin e...@lists.lun.nu wrote: Good news, indeed. Does the Neo FreeRunner support EGNOS signals? Both the hardware and software? We do know this: http://goandtrack.com/u-blox-to-unveil-new-galileo-ready-gps-chip.html Christ van Willegen -- 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Increasing GPS accuracy with EGNOS
The text says that you do not need any special hardware, software only can do the trick (might require firmware, don't know...) On Mon, Oct 5, 2009 at 8:38 AM, Christ van Willegen cvwille...@gmail.comwrote: On Mon, Oct 5, 2009 at 12:39 AM, Erik Lundin e...@lists.lun.nu wrote: Good news, indeed. Does the Neo FreeRunner support EGNOS signals? Both the hardware and software? We do know this: http://goandtrack.com/u-blox-to-unveil-new-galileo-ready-gps-chip.html Christ van Willegen -- 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Increasing GPS accuracy with EGNOS
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.downloadcid=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. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Increasing GPS accuracy with EGNOS
This is probably worth checking to see what is actually happening when in Europe, Someone tell me what command to run on what distro and I'll let you all know... 2009/10/5 Al Johnson openm...@mazikeen.demon.co.uk: 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.downloadcid=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. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Increasing GPS accuracy with EGNOS
On Mon, Oct 5, 2009 at 1:20 PM, Joseph Reeves iknowjos...@gmail.com wrote: This is probably worth checking to see what is actually happening when in Europe, Someone tell me what command to run on what distro and I'll let you all know... Same here, always willing to do some testing! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Increasing GPS accuracy with EGNOS
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.downloadcid=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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Re: Increasing GPS accuracy with EGNOS
On Monday 05 October 2009, Joseph Reeves wrote: This is probably worth checking to see what is actually happening when in Europe, Someone tell me what command to run on what distro and I'll let you all know... If it was going to be that easy I'd have done it myself ;-) AFAIK there isn't a simple ubx utility that would allow us to send parameters to the GPS and watch for the returning messages, so adding a few lines to ogpsd is probably the easiest approach. For anyone who knows their way around ogpsd and ubx it should be quick and easy ;-) I'm not that person, so if I get round to it it may take a little longer... 2009/10/5 Al Johnson openm...@mazikeen.demon.co.uk: 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.downloadcid=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. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Increasing GPS accuracy with EGNOS
Hi all, http://www.esa.int/esaNA/SEM2HGF280G_egnos_0.html The European Union has opened its Egnos navigation augmentation system for public use: The EGNOS signals can be received by GPS receivers equipped with a specific software. In combination with Egnos signals, the accuracy of GPS navigation can be improved significantly; according to ESA, users can navigate with an accuracy of about 2 meters as opposed to GPS alone which provides an accuracy of 10 meters. Seems interesting... (some more information: http://www.egnos-pro.esa.int/index.html) y ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Increasing GPS accuracy with EGNOS
Good news, indeed. Does the Neo FreeRunner support EGNOS signals? Both the hardware and software? Regards, Erik ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
