Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-23 Thread Michael Wouters
I have uploaded the paper that appears in the conference proceedings: http://www.openttp.org/downloads/Multi-GNSS_IFCS-EFTF_2019_paper.pdf Cheers Michael On Sun, Sep 22, 2019 at 9:49 AM Michael Wouters wrote: > > Hello Anders, > > We did some work on single-frequency time-transfer with the F9P

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-23 Thread Michael Wouters
Hello Ragnar Mktimetx uses the receiver-provided sawtooth correction in the TP message. The TDEV plots in the presentation I linked show its effectiveness. Cheers Michael On Mon, 23 Sep 2019 at 4:21 pm, Ragnar Sundblad wrote: > > Hello Michael, > > > On 22 Sep 2019, at 23:54, Michael Wouters

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-23 Thread Anders Wallin
> Anders, > Thanks for sharing your results! I am a but surprised that you have so > large > variations, I wonder how much the antenna placement affects the results. > Just for fun - can you tell us more about how your antenna is place now? > Current antenna placement was restricted by the 5m

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-23 Thread Ragnar Sundblad
Hello Michael, > On 22 Sep 2019, at 23:54, Michael Wouters wrote: > > The OpenTTP software mktimetx applies sawtooth corrections to the TIC > measurements, as you guessed. The corrected TIC measurements are combined > with the raw GNSS pseudo ranges, and then this is what goes into the output

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-22 Thread Michael Wouters
Hello Peter The aim of our study was to characterise the performance of single frequency receivers for time-transfer. The F9P was a late addition to our study and extending our software to dual frequency was too much work at the time. Having a measured ionosphere was not such a huge improvement

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-22 Thread Michael Wouters
Hello Anders, Yes, we used TAPR TICCs do the testing. It’s a very economical solution for testing multiple receivers in parallel. The OpenTTP software mktimetx applies sawtooth corrections to the TIC measurements, as you guessed. The corrected TIC measurements are combined with the raw GNSS

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-22 Thread Anders Wallin
Hi Michael, thanks for the reminder about your slides! Your page 4 has the two setups. I think you are right in that the F9T doesn't seem to take an external receiver clock (even if working with the bare part, not the RCB-board). (FWIW, AFAIK the not-so-low-cost septentrios use the left external

Re: [time-nuts] uBlox F9T testing - best settings?

2019-09-21 Thread Michael Wouters
Hello Anders, We did some work on single-frequency time-transfer with the F9P earlier this year which we presented at IFCS-EFTF in April. http://www.openttp.org/downloads/Multi-GNSS_IFCS-EFTF_2019.pdf There's a paper too, which I should upload. In short, the F9P is very suitable for code-based