Did you try with simultaneous mode of ambiguity resolution and use a smaller min ratio to fix ambiguity, such as 2 or 1.5?
Kind regards, Yanqing > On 17 Sep 2014, at 23:05, "Sean Hyde" <[email protected]> wrote: > > Hey Guys, > > I’ve been playing around with RTKLib for a couple months now and have run > into some issues and I was wondering if anyone had any idea on how to improve > performance. > > ---Setup--- > Base Station: > NVS08C on custom PCB using the receiver to power the antenna > Antenna is Taoglas Limited AA.161.301111 > (http://www.taoglas.com/images/product_images/original_images/AA.161.301111.pdf) > Antenna is on a 12” x 24” steel plate > Connected via FTDI->USB to Rasperry Pi > Raspberry Pi runs str2str to send the data to Windows laptop running rtknavi > using wifi backhaul > > Rover: > NVS08C on custom PCB using the receiver to power the antenna > Antenna is Taoglas Limited AA.161.301111 > (http://www.taoglas.com/images/product_images/original_images/AA.161.301111.pdf) > Antenna is on a 18” x 18” steel plate > Connected via FTDI->USB to Rasperry Pi > Raspberry Pi runs str2str to send the data to Windows laptop running rtknavi > using wifi backhaul > > The Rover setup is on a small mobile robot with a top speed of about 3mph. > It is in a city (Pittsburgh), but the sky is relatively unobstructed. > > I’m running rtknavi in Kinematic mode using only GPS, L1+L2, 15deg elevation > mask. The position that I input for the base station is a 5 hour average > (though it seems to have lost some precision when I pasted it?). I have > tried both Continuous and Fix and Hold Integer Ambiguity Res. I’ll try to > attach screen shots of rtknavi. > > Right now, it kind of works. I can get relatively jitter-free floats and > occasionally fixes, but these fixes don’t last long and I’m not sure they are > actually globally accurate (ie: if you restart the software, you may get a > fix, but it may be several meters from your last fix). Sometimes a fix goes > away and never seems to come back. > > I’m wondering if you guys have any suggestions to improve these results. > Better antennas? (Which ones?) > Trying to get better placement of the base station? > Different settings in rtknavi? > Continuous vs Fix and Hold? > > Thanks! > -Sean > > <image001.png> <image002.png> <image003.png> <image004.png> > _______________________________________________ > 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
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