[time-nuts] Re: What GNSS module to buy for a good time reference?

[Erik Kaashoek]

As I needed the accurate PPS in the coming weeks I decided to go for the
ZED-F9T L1/L2 and if all is well it will arrive tomorrow.
Now I need to understand how all this "postprocessing" works.
Some questions:

1: The ublox tools show ability to output basic or full raw data and there
are various scripts  to convert ublox data to Rinex and there are some
websites listing the commands required to get the required output but is
there a dummy's guide somewhere on how to get the RINEX data from the
ZED-F9T in the correct version/format for the postprocessing?

2: NRCan seems to process only for Canada (according to their website,
correct???). Auspos is listed as processing for the whole world. There are
some others. What would be a recommended service? I'm located in Europe.

Erik.


Op wo 21 jun 2023 om 19:34 schreef Bob Camp via time-nuts <
time-nuts at lists.febo.com>:

> Hi
>
> The “big deal” with no L2 is fairly simple:
>
> One of the great things about dual freq modules is the ability to send off
> data
> and very quickly get back a corrected version. If you use NRCan, this
> includes
> clock corrections. They are good to the ~ 0.1 ns level. You can get to <
> 1x10^-14
> in less than a day.
>
> The problem is, the free correction services (at the moment) are L1 / L2
> based.
> For whatever reason, they don’t (yet) understand L5. That may change, or it
> may not change. Right now, it’s the way it is ….
>
> If you want to go crazy, the Mosaic-T is the best of the best in terms of
> GNSS
> modules at the moment. They apparently are well aware of this and charge
> accordingly. You can buy a *lot* of F9T’s for the price of one Mosaic-T.
>
> Bob
>
>