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[Discuss-gnuradio] GPS L2C transmissions?

From: Peter Monta
Subject: [Discuss-gnuradio] GPS L2C transmissions?
Date: Fri, 08 Aug 2008 07:53:21 -0700
User-agent: Thunderbird (X11/20080501)

On the chance that there are GPS folks here that are
familiar with the status of the new L2C signals:  is there
a currently-maintained list of which satellite is emitting
what?  In particular, PRN 29 seems to have no L2C (or
at least none that I can acquire), while PRN 31 has a nice
strong carrier (tracked with L2CM) but no NAV or CNAV data
modulation---it's apparently sending only carrier.  I'd
like to find a signal with CNAV data.

While I haven't tried it yet, the USRP should be capable
of saving to disk both L1 and L2C using a pair of dbsrx
daughtercards.  That should permit dual-frequency
receiver software.  It would be nice to have a
waveform-pair-to-RINEX tool to allow use of the various
web services for dual-frequency solutions.


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