Hi There, I have a similar problem (L1 base station with NVS08C. I tested with Toaglass and Tallysman antennas. The quality of antennas really matter. The tallysman I used (is also more expensive) gave better results but not as accurate as using GNSS base station.
My conclusion is you better look for L1 and L2 base station and better antenna than your Toaglass. regards Ambes ________________________________________ Van: [email protected] <[email protected]> namens [email protected] <[email protected]> Verzonden: woensdag 17 september 2014 23:06 Aan: [email protected] Onderwerp: FOSS-GPS Digest, Vol 68, Issue 7 Send FOSS-GPS mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://lists.osgeo.org/mailman/listinfo/foss-gps or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of FOSS-GPS digest..." Today's Topics: 1. Mobile Robot Experimentation (Sean Hyde) ---------------------------------------------------------------------- Message: 1 Date: Wed, 17 Sep 2014 17:05:35 -0400 From: "Sean Hyde" <[email protected]> To: <[email protected]> Subject: [FOSS-GPS] Mobile Robot Experimentation Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii" 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osgeo.org/pipermail/foss-gps/attachments/20140917/04981835/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.png Type: image/png Size: 25680 bytes Desc: not available URL: <http://lists.osgeo.org/pipermail/foss-gps/attachments/20140917/04981835/attachment.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: image002.png Type: image/png Size: 29201 bytes Desc: not available URL: <http://lists.osgeo.org/pipermail/foss-gps/attachments/20140917/04981835/attachment-0001.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: image003.png Type: image/png Size: 26117 bytes Desc: not available URL: <http://lists.osgeo.org/pipermail/foss-gps/attachments/20140917/04981835/attachment-0002.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: image004.png Type: image/png Size: 19442 bytes Desc: not available URL: <http://lists.osgeo.org/pipermail/foss-gps/attachments/20140917/04981835/attachment-0003.png> ------------------------------ _______________________________________________ FOSS-GPS mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/foss-gps End of FOSS-GPS Digest, Vol 68, Issue 7 *************************************** _______________________________________________ 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
