[time-nuts] Frequencies used for GPS

Brooke Clarke brooke at pacific.net
Thu Oct 20 01:36:48 UTC 2011


Hi David:

Here's a table listing all of them I know about and their harmonic numbers.
http://www.prc68.com/I/DAGR.shtml#GPSs
also see
http://en.wikipedia.org/wiki/GPS_signals#Frequencies_used_by_GPS

The signals are all circular polarization, but the handedness would be 
difficult to describe.

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.End2PartyGovernment.com/


David Kirkby wrote:
> Can anyone tell me the transmission frequencies used for GPS?
> Wikipedia says 1.57542 GHz (L1 signal) and 1.2276 GHz (L2 signal), but
> I'm confused about what the L2 signal is. Is this only of use to the
> military since the data is encrypted, or can consumer based GPS
> systems use this frequency?
>
> My reason for wanting to know is so I can design an antenna for GPS,
> but it wont be used for military purposes, so I've no idea whether I
> need to worry about the performance at the lower frequency or not.
>
> As always with Wikipedia, one can't be sure of the accuracy of the
> information. I'm guessing someone here will know precise details about
> the frequencies used.
>
> Also, what sort of polarisation is used?
>
> If anyone can tell me the desirable characteristics of an antenna for
> GPS, I would like to know. The antenna will be mounted outside and
> needs to be waterproof, so I'm not looking to fit the antenna in a
> small package.
>
>
> Dave
>
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