question about GPS power level in earth surface

Discussion in 'GPS Technical Discussion' started by ongga, Apr 10, 2012.

  1. ongga

    ongga

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    hi i am ongga, my gps have received NMEA
    $GPGSV,3,1,12,14,48,076,38,30,38,343,31,31,12,017, 29,06,64,170,39*71
    the article say that SNR is in the seven point, that means SNR = 38
    what is the meaning of 38? 38 dB or dBm?
    and what is the power level gps in the earth surface??
    thank's
     
    ongga, Apr 10, 2012
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  2. ongga

    mbavaro77

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    The unit is dB-Hz.

    It is a pretty long story.. please google for example
    GPS_Compendium(GPS-X-02007).pdf
     
    mbavaro77, Apr 10, 2012
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