Be sure to increase your serial port baud rate.
There's MUCH longer packets, and more of them, than data than NMEA
fixes. In my experience if there's too much data it just overruns the
buffer and data gets lost. The link is full of errors and the fix
disappears.
It may appear fine early on after power-up. But as more satellites get
added, the data gets longer and longer, and you may oddly lose the fix
as it becomes "good".
You can also disable data you don't need to keep the link bandwidth down.
The graphical interface of U-Center allows you to turn on/off msg types
for each port. It'll be saved if you have a battery on the GPS, which
you should to maintain the RTC.
Danny
On 4/30/2014 12:16 PM, Scott Harrison wrote:
Leor,
You have to go into U-Center and enter the following custom message:
to enable RXM-RAW
b5 62 09 01 10 00 c8 16 00 00 00 00 00 00 97 69 21 00 00 00 02 10 2b 22
to enable RXM-SFRB
b5 62 09 01 10 00 0c 19 00 00 00 00 00 00 83 69 21 00 00 00 02 11 5f f0
This will turn on the raw data you need, but it is stored in RAM so
you will need to resend the codes every time you power up.
Also, set your type to PPP and then you should start to see sub-meter
accuracy with RTKLib.
see http://wiki.openstreetmap.org/wiki/RTKLIB
Scott
On Wed, Apr 30, 2014 at 7:56 AM, vbenso <[email protected]> wrote:
Leor,
It's been a long time since I don't touch my GPS hardware, so I could be
wrong. That being said.
As far as I remember, rtklib needs more information than just UBX-RXM-RAW in
order to obtain an accurate fix. The neo6m should send another message
(maybe RXM-SFRB?) that I wasn't able to get from the receiver.
I could get ordinary gps precision in static and single modes of rtklib.
Good luck, and in case of any development let me know.
Victor A. P. Benso
Sementes Benso
Major Vieira - SC
(47) 9922-9599
(47) 3655-1192
On Mon, Apr 28, 2014 at 4:49 PM, leor [via Open Source GPS-related
discussion and support] <[hidden email]> wrote:
I got 2 CN-06 (neo6m) recievers to output into RTKlib both over serial
COM. Problem is that I have not been able to get a fix and always get a
single status. Also whenever I choose static it seems to change everytime I
start it. Using dgps and kinematic gives me an accuraccy of around 50m. I
have tested this indoors and managed to get RAW data. Any idea how it would
perform outdoors? I am trying to collect data to creat GCP for use in ortho
correction
[IMG]http://i.imgur.com/kj3Z5IV.jpg[/IMG]
Great info you guys have. I got it to work but I am not sure what kind of
accuracy I will be getting
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