[time-nuts] Earth rotation angle parameters via GPS?

[Magnus Danielson]

From: Bruce Griffiths <bruce.griffiths at xtra.co.nz>
Subject: Re: [time-nuts] Earth rotation angle parameters via GPS?
Date: Wed, 19 Mar 2008 16:38:28 +1300
Message-ID: <47E08AB4.3040009 at xtra.co.nz>

> Bruce Griffiths wrote:
> > The GPS interface control document IS-GPS-200D defines message type 32 
> > on page 145 (Figure 30-5) and pages 175-178.
> > The message contains the parameters necessary to calculate UT1 (Earth 
> > rotation angle) when UTC is known.
> > Does anyone know of a readily available GPS receiver that makes these 
> > parameters accessible to the user?
> >
> > Bruce
> >   
> Rephrasing the above:
> 
> What GPS receivers (preferably timing recievers) are readily available 
> that make the data contained in the CNAV messages broadcast on L2C 
> available to the user?

L2C capable receivers are still rare. I am supprised we have not seen any
normal user GPS with L2C capability. There are now 6 birds up there with L2C
capability.

With L1 C/A and L2C capability a standard receiver should be able to greatly
improve precission.

Cheers,
Magnus