Hi Nick No for the base I use the Leica GG02 L1/L2 and only use the LEA6 T on the roving units I will save a plot and send it to you to show you the results I get.
What coax to you use? I normally use either LMR 400 where I can use TNC connectors and 173 where I use SMA but then not longer than 10 cm of 173. I have had a situation where have a Leica SR 500 base and a AT504 antenna where we used 23 meters of RG58, we had lots of problems with the base. I changed the coax to LMR 400 and did not have any problems after the change Regards Anton On Tue, Jul 1, 2014 at 10:07 PM, Nick Østergaard <[email protected]> wrote: > Ok, interresting. Is is working with the patch on both rover and base? > I have tried with a setup, but I had had very bad results, especially > when I moved. Attached is results I have had, and that with antennas > as [1] with bias voltage on and half a meter of coax. The signal is > great as far as I remember. I have LEA6T's also (maybe 4T), although I > don't quite remember exactly, it is quite some time ago since I tried. > > Attached is a post processed result. > > [1] > http://dk.rs-online.com/web/p/smt-antenner/7239151/?searchTerm=SM-1575&relevancy-data=636F3D3226696E3D4931384E4B6E6F776E41734D504E266C753D6461266D6D3D6D61746368616C6C7061727469616C26706D3D5E5B5C707B4C7D5C707B4E647D2D2C2F255C2E5D2B2426706F3D313326736E3D592673743D4D414E5F504152545F4E554D4245522677633D424F5448267573743D534D2D3135373526 > > 2014-07-01 21:38 GMT+02:00 Anton Strydom <[email protected]>: > > Hi Nick > > > > Yes I get a reasonable plot using that specific unit. However for what we > > intend doing in the long term we will be using a different design helical > > antenna that we are in the process of developing. > > > > The units in the photographs are only for testing and setting up but we > get > > good results. For communication we use cellular routers connected to > Leica > > GGO2 L1/L2 base or else we use 3D Robotics XBEE radios. On the roving > unit I > > use an ARM processor where I have 4 rs232 ports available. It works very > > well and is very stable. > > > > The radios I use where i have no cellular coverage. > > > > Attached is a photograph of the base setup > > > > Regards > > > > Anton > > > > > > On Tue, Jul 1, 2014 at 9:27 PM, Nick Østergaard <[email protected]> > wrote: > >> > >> Hi Anton > >> > >> Really? You get by with that small patch antenna? Is that a good (green > in > >> rtkplot) RTK solution you get from that constant? > >> > >> Regards > >> Another Nick > >> > >> Den 01/07/2014 21.11 skrev "Anton Strydom" <[email protected]>: > >> > >>> Hi Nick > >>> > >>> I have done a lot of testing with U-Blox LEA 6T at speeds of up to 120 > km > >>> / h. Lat & Lon does not appear to be a problem but elevation is a > problem. I > >>> paid the equivalent of $60 for the 2 receivers and ceramic patch > antennas. > >>> > >>> They are accurate on base line up to 10km where after accuracy > >>> drastically degrades. > >>> > >>> I do all my testing in real time and do not post process. > >>> > >>> If you want to I can speak to my supplier and see if they still have > some > >>> of the LEA 6T's in stock at the price I paid for them. > >>> > >>> Attached are photographs of the units I am using > >>> > >>> Regards > >>> > >>> Anton > >>> > >>> > >>> On Tue, Jul 1, 2014 at 8:50 PM, Danny Miller <[email protected]> > >>> wrote: > >>>> > >>>> It does work in moving. But signal problems do still make the > position > >>>> jump around, trees and buildings and an antenna's orientation > changing can > >>>> make an error happen. Antenna quality has a lot to do with that, too. > >>>> > >>>> RTKLib requires a GPS with RAW pseudorange outputs. The NV08C is a > >>>> good, cheap one to do it: > >>>> > >>>> http://www.nvs-gnss.com/contacts.html > >>>> > >>>> Contact your local sales rep there- it was actually easy in my > >>>> experience to order a couple from them, and oddly cheaper than Newark > >>>> element 14, as well as quicker to ship. > >>>> > >>>> Danny > >>>> > >>>> > >>>> On 7/1/2014 1:24 PM, Nick wrote: > >>>> > >>>> Hello, > >>>> > >>>> I am interested in getting an RTK GPS setup working for a moving > >>>> vehicle, not fast, perhaps 10 mph. I would postprocess the data > collected > >>>> later, using data downloaded from a nearby station. > >>>> > >>>> My desire is to log elevation data every few seconds as the vehicle > >>>> drives. I hope to achieve 10-20 cm accuracy for the position and the > >>>> elevation. > >>>> > >>>> As I research RTKLIB, it seems like most information I come across is > >>>> regarding a static location. Is my goal feasible to achieve this kind > of > >>>> accuracy as the vehicle moves? > >>>> > >>>> If so, can anyone recommend a good board to get me started? I'm hoping > >>>> to be able to do this for under $200 (just one receiver since the base > >>>> station is public) -- please give me a reality check if this is > unlikely. > >>>> Thanks, > >>>> > >>>> Nick > >>>> > >>>> > >>>> > >>>> _______________________________________________ > >>>> This message is sent to you from [email protected] mailing > list. > >>>> Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your > >>>> subscription > >>>> For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS > >>>> > >>>> > >>>> > >>>> _______________________________________________ > >>>> This message is sent to you from [email protected] mailing > list. > >>>> Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your > >>>> subscription > >>>> For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS > >>> > >>> > >>> > >>> _______________________________________________ > >>> This message is sent to you from [email protected] mailing > list. > >>> Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your > >>> subscription > >>> For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS > >> > >> > >> _______________________________________________ > >> This message is sent to you from [email protected] mailing list. > >> Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your > >> subscription > >> For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS > > > > > > > > _______________________________________________ > > This message is sent to you from [email protected] mailing list. > > Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your > > subscription > > For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS > > _______________________________________________ > This message is sent to you from [email protected] mailing list. > Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your > subscription > For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS >
_______________________________________________ This message is sent to you from [email protected] mailing list. Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your subscription For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
