Re: Satellites show up multiple times

[Gary E. Miller]

Yo Andreas!

On Wed, 5 Aug 2020 09:29:23 +0200
Andreas B <panden@gmail.com> wrote:

> > I find "3" strange, vs something like L1/L2.

Much more complicated than L1/L2.  Even L1 has 4 different modulation
schemes.

From gps.h, the gpsd definition of sigid:

    /* sigid as defined by u-blox 9, and used here
     * GPS:      0 = L1C/A, 3 = L2 CL, 4 = L2 CM
     * SBAS:     0 = L1C/A, ? = L5I
     * Galileo:  0 = E1 C,  1 = E1 B,  5 = E5 bl, 6 = E5 bQ
     * BeiDou:   0 = B1I D1, 1 = B1I D2, 2 = B2I D1, 3 = B2I D2
     * QZSS:     0 = L1C/A, 4 = L2 CM, 5 = L2 CL
     * GLONASS:  0 = L1 OF, 2 = L2 OF
     *
     * sigid as defined by NMEA 4.10, NOT used here
     * GPS:      1 = L1C/A, 6 = L2 CL, 5 = L2 CM
     * Galileo:  7 = E1 C,  7 = E1 B,  2 = E5 bl, 2 = E5 bQ
     * BeiDou:   1 = B1|D1, 1 = B1|D2, 3 = B2|D1, 3 = B2|D2
     * QZSS:     not defined
     * GLONASS:  1 = L1 OF, 3 = L2 OF

I used the u-blox definition as it includes more signal types.

> >  Keep in mind that Galileo has
> > E5a and E5b.  So there really needs to be a "signal" field added.

That is part of the sigid.  See above.

RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@rellim.com  Tel:+1 541 382 8588

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