Re: [Discuss-gnuradio] GPS information

On 08/08/2019 02:10 PM, Sara Kim wrote:
> Hi,
> I'm using gnu radio companion along with my USRP B200. I also have a
> GPSDO installed on the radio. Does the gps information get collected
> along with any frequency data I collect via gnu radio companion? Also,
> is it possible to display that information in the metadata header?
>
> Thanks!
>
No, the GPS information is not carried along with samples. The
underlying UHD driver does have a sensor interface.

If you look at the source code for the "query_gpsdo_sensors" UHD
utility, you can see how they work, and gr-uhd does provide
APIs for querying, etc. But none of this is inserted automatically
as stream tags or anything.

https://www.gnuradio.org/doc/doxygen/classgr_1_1uhd_1_1usrp__source.html

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