PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-21:27:40
G02     63.5           30.2                7.1 +/-    1.78      12.4 +/-    1.78  0.030 / 0.030
G05     51.5           55.8                8.9 +/-    0.45      10.5 +/-    0.45  0.030 / 0.030
G12     181.1          23.6               12.0 +/-    1.04      24.1 +/-    1.04  0.220 / 0.300
G13     123.0          19.3               13.3 +/-    1.92      29.8 +/-    1.92  0.110 / 0.310
G15     162.7          15.7               13.8 +/-    1.04      33.8 +/-    1.04  0.080 / 0.120
G21     275.8          20.1                9.6 +/-    1.64      21.1 +/-    1.64  0.080 / 0.120
G25     227.9          47.2               11.4 +/-    3.39      14.9 +/-    3.39  0.100 / 0.100
G29     331.2          59.2                9.7 +/-    0.36      11.1 +/-    0.36  0.080 / 0.060