PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-14:28:00
G01     119.5          17.7                9.8 +/-    2.56      22.8 +/-    2.56  0.100 / 0.330
G07     79.4           66.8                9.5 +/-    0.51      10.3 +/-    0.51  0.110 / 0.230
G08     45.1           31.8                7.1 +/-    1.34      12.0 +/-    1.34  0.040 / 0.030
G09     176.1          25.2                9.5 +/-    1.64      18.4 +/-    1.64  0.030 / 0.030
G11     106.9          39.8               10.5 +/-    0.73      15.3 +/-    0.73  0.110 / 0.230
G13     317.8          19.2                6.9 +/-    1.45      15.5 +/-    1.45  0.100 / 0.210
G17     201.7          23.6                9.9 +/-    2.17      20.1 +/-    2.17  0.110 / 0.170
G18     94.5           20.7                8.4 +/-    1.55      18.1 +/-    1.55  0.090 / 0.170
G28     291.9          57.2                7.8 +/-    1.59       9.1 +/-    1.59  0.030 / 0.020
G30     344.8          67.9                9.1 +/-    0.67       9.7 +/-    0.67  0.030 / 0.020