Dear Mr. Takasu an other list members:
I am aware (not really aware, I've just heard off...) of the following solutions to the positioning problem we are dealing with (GNSS positioning): a) Least mean square (LMS) b) Weighted least mean square (WLMS) c) Kalman filter c.1) static positioning: coordinates of the receiver are constants and the estimated clock offset of the receiver is white noise with zero mean c.2) kinematic positioning for high receiver velocity: coordinates and clock offset are modelled as zero mean white noise c.3) kinematic positioning for low velocity: the coordinates are modelled as a random walk I think that a) and b) are not suitable to RTK positioning because of the ill-conditioning of the design matrix (very short observation time spans, frequently one solution per epoch). I'm I right? If I'm right then it follows that in RTK we are using some sort of "Kalman filter" type solutions. And if we are using "Kalman filters" type solutions then the following questions arise: 1. RTKPOST "static" is like c.1)? 2. RTKPOST "kinematic" is like c.2) or c.3)? 3. And RTKPOST "single"? Is it LMS/WLMS? Regards Antonio 2011/10/28 Tomoji TAKASU <[email protected]> > Dear Antonio > > > Can anyone explain give me a brief explanation regarding the differences >> between the position modes options in RTKPOST? I am especially interested >> in >> the following modes: Single, Kinematic, Static, Moving-base and Fixed. >> > > I think they are generally common terminologies > among GNSS positioning area except for "Fixed". > > So see the manual and search by Google. > > "Fixed" is special in RTKLIB. In the mode, the user > position is fixed to a priori values specified by user > options and other parameters like ionosphere, > troposphere are estimated. It is also used for the > analysis of measurement noise and multi-path with > residuals. > > regards, > > ********* > Tomoji TAKASU > > ------------------------------**-------------------- > From: "António Pestana" <[email protected]> > Sent: Saturday, October 29, 2011 3:34 AM > To: "Open Source GPS-related discussion and support" < > [email protected]> > Subject: [FOSS-GPS] Position modes in RTKPOST > > > Can anyone explain give me a brief explanation regarding the differences >> between the position modes options in RTKPOST? I am especially interested >> in >> the following modes: Single, Kinematic, Static, Moving-base and Fixed. >> >> Regards >> >> Antonio >> >> > > > ______________________________**_________________ >> This message is sent to you from [email protected] mailing list. >> Visit >> http://lists.osgeo.org/**mailman/listinfo/foss-gps<http://lists.osgeo.org/mailman/listinfo/foss-gps>to >> manage your subscription >> For more information, check >> http://wiki.osgeo.org/wiki/**FOSS-GPS<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<http://lists.osgeo.org/mailman/listinfo/foss-gps>to > manage your subscription > For more information, check > http://wiki.osgeo.org/wiki/**FOSS-GPS<http://wiki.osgeo.org/wiki/FOSS-GPS> >
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