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| From: | Don Rolph |
| Subject: | Re: GPSD 3.22 autobauding under bullsEye |
| Date: | Mon, 13 Dec 2021 17:06:08 -0500 |
Yo Don!
You responded to me, but not the list. I'm adding them back so
that all may participate, even if just by lurking.
On Mon, 13 Dec 2021 16:52:34 -0500
Don Rolph <don.rolph@gmail.com> wrote:
> No GPS lock.
Nothing gpsd does could possibly affect how fast your GPS locks.
Once there is power to the receiver, it start up. Regardless of any
client input. In some special cases, like cell phones, the power to the
receiver may only be applied when there is a client listening, but after
power is applied the retuls are the same.
That is a function of:
1) is almanac current?
2) any current ephermii?
3) how many channesl the receiver has
4) the receivers doppler search algorithm
gpsd does not do it, but some receiver clients can download the almanac
and ephemeri from the internet to speed startup. With modern 179
channel receivers, that does not help much.
> But a typical about 6 min cold
> start for gpsd 3.17 to get a fix is perhaps 8 minutes under gpsd 3.22
> to get a fix.
Not possible. You should be measuring the time from power on. If you
receiver has non-volatile memory, that will be a confounding factor.
> And of course I cant have gpsd running if the system is powered down.
But you can use a receiver with non-volatile memory. Or a modern
receiver that starts in seconds.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
gem@rellim.com Tel:+1 541 382 8588
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"If you can't measure it, you can't improve it." - Lord Kelvin
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