I like your idea of using the 1PPS output to sync an external event logger. Please keep us posted if you make progress in the stop-and-go hardware part, perhaps better at the NavSpark forum: < http://www.navspark.com.tw/forum/event-marker-for-post-processed-stop-and-go-rtk?context=category-NS-RAW > I might be able to help with the software part if necessary, especially the matrix/vector weighted averaging code. All the best, -F.
Date: Mon, 20 Apr 2015 17:14:28 -0700 > From: julio menezes <[email protected]> > To: Open Source GPS-related discussion and support > <[email protected]> > Subject: Re: [FOSS-GPS] rtklib kinematic Stop Go post-processing with > rnx2rtkp > Message-ID: > <[email protected]> > Content-Type: text/plain; charset=iso-8859-1 > > Dear Dr. Felipe Nievinski, > > > <<<< > -------------------------------------------- > Em seg, 20/4/15, Felipe G. Nievinski <[email protected]> escreveu: > > Assunto: [FOSS-GPS] rtklib kinematic Stop Go post-processing with rnx2rtkp > Para: [email protected] > Data: Segunda-feira, 20 de Abril de 2015, 1:58 > > Let me resurrect > this old thread. > The processing could be done in kinematic mode > (either forward-only or forward+backward combined).? That > way, initialization tricks (antenna-swap, fixed-length bar) > as well as ambiguity reinitialization (cycle slips) are less > of an issue.? > Then stop-and-go could be implemented forming > weighted averages of the kinematic position coordinates and > precision (3-by-1 vectors and 3-by-3 matrices). > It'd require a time table of occupation > start and end times (and marker name), which could be > obtained simply grepping the rover RINEX observation file to > extract event flags. > If I were to implement this, I'd be easier > for me to do it Octave rather than built into RTKLIB's C > code. > -Felipe. > PS: the non-integer epoch seconds can be handled > by teqc, see, e.g.:< > http://postal.unavco.org/pipermail/teqc/2012/001310.html> > >>>>> > > Thank you for your explanation. > > I agree, instead build inside rtklib C code, i am using GNU utils ( grep, > awk,sed, octave,... ). > > I plan to use 1PPS signal to sync trigger events. ( closed loop ) and will > write my own occupation time table logger (gps time sync and epoch > count... ). > > best regards, > > julio menezes > >
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