[time-nuts] GPS-18, Windows, NTP & Lat Lon

[brent evers]

Wouldn't turning off ntp drive it nuts?

At the risk of throwing out the bone head answer and assuming this isn't
going on your next space craft, you could just split the GPS serial (my
quick google showed the 18 to be the serial unit vs usb) signal and run a
copy to another comm port..

Yeah - I'm pretty sure you had already thrown that idea out..

Brent


On Tue, Sep 3, 2013 at 8:42 PM, Jim Lux <jimlux at earthlink.net> wrote:

> On 9/3/13 5:35 PM, Jim Lux wrote:
>
>> I'm looking for an easy way to get current lat lon, when you've got a
>> GPS-18 hooked up for NTP.  That is, the GPS receiver is there doing it's
>> NTP thing, so presumably it knows where it is.
>>
>>
>> If NTP is decoding the GPRMC message, it has the lat/lon in it, so how
>> can I get that info out (in a command line utility, into a file, or some
>> such)
>>
>> I don't need millisecond time accuracy.. For now the GPS is just to make
>> sure that the time is "right".
>>
>>
>> The GPGGA sentence would also do.
>>
>> And, I only need the GPS position once within a 30 second interval (it's
>> not moving, I just want to know where it is).
>>
>> It's not like ntpd or ntpq have some handy switch that says "display
>> current lat/lon"  (which makes sense, because NTP is fundamentally time
>> source agnostic).
>>
>> All of this with Windows 7.
>>
>>
>
> I suppose one way is to turn off NTP (releasing the com port), grab some
> data from the com port, parse it, then turn NTP back on.
>
> But that seems mighty clunky...
>
> I was hoping for some log file/debug feature that says "give me the last
> sentence from the GPS".
>
>
>
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