"Slip Detected" occurs when the GPS receiver temporarily loses track of a satellite. It isn't a full fledged loss of the satellite, but rather a "glitch" in the phase/Doppler data.
"Large Residuals" mean the GPS equations didn't find a consistent solution. It can happen for a number of reasons, including slips, errant data from the receiver, or incorrect lat/lon of the base station. Both errors are common if your receivers don't have a clear view of the sky. Expect them when your rover is operating under or near trees, buildings, etc. Usually, post-processing software tries to identify measurements which throw things askew, and then corrects the problem by dropping or correcting those measurements. The process isn't perfect, and sometimes the errors dominate. From: [email protected] [mailto:[email protected]] On Behalf Of Michele Bavaro Sent: Thursday, August 09, 2012 5:32 AM To: Open Source GPS-related discussion and support Subject: Re: [FOSS-GPS] What do "slip detected" and "large residual" mean? You may not be setting the position of the base station correctly? Cheers, Michele On 08/08/2012 09:25, Yebin Lee wrote: Hello, I've been using RTKLIB for several weeks and I faced several warning messages which cannot understand while running RTKLIB. Most warning messages are "slip detected" and "large residual". Could any one comment me that what those messages indicate and how to solve them? Thanks. Regards, Yebin Lee _______________________________________________ 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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