没有任何卫星信号?请教搞手怎么解决?
$gpgga,,0000.0000,s,00000.0000,w,0,00,,-18.0,m,18.0,m,,*7f
$gpgll,0000.0000,s,00000.0000,w,,v*32
$gpgsa,a,1,,,,,,,,,,,,,,,*1e
$gpgsv,1,1,00,,,,,,,,,,,,,,,,*79
$gprmc,,v,0000.0000,s,00000.0000,w,,,,7.4,w*7f
$gpvtg,,t,,m,,n,,k*4e
$gpzda,120101.00,01,01,2008,00,00*6f
$gpgga,,0000.0000,s,00000.0000,w,0,00,,-18.0,m,18.0,m,,*7f
$gpgll,0000.0000,s,00000.0000,w,,v*32
$gpgsa,a,1,,,,,,,,,,,,,,,*1e
$gpgsv,1,1,00,,,,,,,,,,,,,,,,*79
$gprmc,,v,0000.0000,s,00000.0000,w,,,,7.4,w*7f
$gpvtg,,t,,m,,n,,k*4e
$gpzda,120102.00,01,01,2008,00,00*6c
$gpgga,,0000.0000,s,00000.0000,w,0,00,,-18.0,m,18.0,m,,*7f
$gpgll,0000.0000,s,00000.0000,w,,v*32
$gpgsa,a,1,,,,,,,,,,,,,,,*1e
$gpgsv,1,1,00,,,,,,,,,,,,,,,,*79
$gprmc,,v,0000.0000,s,00000.0000,w,,,,7.4,w*7f
$gpvtg,,t,,m,,n,,k*4e
$gpzda,120103.00,01,01,2008,00,00*6d
$gpgga,,0000.0000,s,00000.0000,w,0,00,,-18.0,m,18.0,m,,*7f
$gpgll,0000.0000,s,00000.0000,w,,v*32
$gpgsa,a,1,,,,,,,,,,,,,,,*1e
$gpgsv,1,1,00,,,,,,,,,,,,,,,,*79
$gprmc,,v,0000.0000,s,00000.0000,w,,,,7.4,w*7f
$gpvtg,,t,,m,,n,,k*4e
$gpzda,120104.00,01,01,2008,00,00*6a
$gpgga,,0000.0000,s,00000.0000,w,0,00,,-18.0,m,18.0,m,,*7f
$gpgll,0000.0000,s,00000.0000,w,,v*32
$gpgsa,a,1,,,,,,,,,,,,,,,*1e
$gpgsv,1,1,00,,,,,,,,,,,,,,,,*79
$gprmc,,v,0000.0000,s,00000.0000,w,,,,7.4,w*7f
$gpvtg,,t,,m,,n,,k*4e
$gpzda,120105.00,01,01,2008,00,00*6b
$gpgga,,0000.0000,s,00000.0000,w,0,00,,-18.0,m,18.0,m,,*7f
$gpgll,0000.0000,s,00000.0000,w,,v*32
$gpgsa,a,1,,,,,,,,,,,,,,,*1e