Re: [Discuss-gnuradio] Looking for Raw GPS L1 and L2 signal data

[Krzysztof Kamieniecki]

It may be cheaper to use an off-the-shelf GPS receiver, but it's not as fun as trying to write one 
yourself.

Chris Albertson wrote:
> Oh, you mean "raw signal data" as in a recording of the raw data.
> I thought you ment "data about the raw signal".  
>
> After re-reading the specs, I think the only thing that _could_
> receive GPS is an SDR.  as the signal is spread spectrum.
> My little HT will receive the frequecy
> that GPS uses but I don't think the full 1Mhz bandwidth signal
> will come out the earphone jack ;-)  I am very much impresed
> that Garman can sell a 12 channel parallel GPS receiver for $116
> Qty 1 retail.
>
> I think the cheapest way to receive GPS with your computer is
> to connect to GPS's NMEA port to the computer's RS-232.  Yes I
> know, rs232 is not good enough for some applcations.
>
>
> --- Krzysztof Kamieniecki <address@hidden> wrote:
>
> > Thanks for the links, they don't seem to have any raw signal data.
> >
> > If anyone is interested, the "spec" for GPS is called ICD-200c and
> > can be found here
> > http://www.navcen.uscg.gov/pubs/gps/icd200/default.htm
> >
> > It seems like no one is willing to waste their bandwidth on hosting
> > hundreds of MBs of digitized GPS 
> > signals. :(
> >
> > My search continues...
> >
> > Chris Albertson wrote:
> >
> > > See if this helps.
> > > http://www.colorado.edu/geography/gcraft/notes/gps/gps_f.html
> > >
> > > If not get back with me on this list.  My office is about 200
> > > yards away from the GPS Program office which houses the owners of
> > > GPS system.  I could ask around about the location of the
> > > publically releasable specification documents.
> > >
> > > For those who know nothing about GPS see the primer at
> > > http://www.aero.org/publications/GPSPRIMER/
> > > But if you know what L1/L2 means don't bother with it.
> > >
> > > --- Krzysztof Kamieniecki <address@hidden> wrote:
> > >
> > >
> > > > Howdy,
> > > >
> > > > Does any have or know of a source for GPS L1 (and possibly L2) I/F
> > > > signal data?
> > > >
> > > > --
> > > > Krzysztof Kamieniecki
> > > > mailto:address@hidden
> > > >
> > > >
> > > >
> > > > _______________________________________________
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> > >
> > >
> > >
> > > =====
> > > Chris Albertson
> > >  Home:   310-376-1029  address@hidden
> > >  Cell:   310-990-7550
> > >  Office: 310-336-5189  address@hidden
> > >  KG6OMK
> > >
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> > --
> > Krzysztof Kamieniecki
> > mailto:address@hidden
> >
> >
> >
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>
>
> =====
> Chris Albertson
>   Home:   310-376-1029  address@hidden
>   Cell:   310-990-7550
>   Office: 310-336-5189  address@hidden
>   KG6OMK
>
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--
Krzysztof Kamieniecki
mailto:address@hidden