PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-13:57:50
G07     39.6           69.7                8.1 +/-    0.79       8.6 +/-    0.79  0.080 / 0.300
G08     53.8           42.6                7.7 +/-    0.85      10.8 +/-    0.85  0.060 / 0.340
G09     177.5          39.2                9.9 +/-    1.49      14.7 +/-    1.49  0.030 / 0.030
G11     122.2          32.9                9.9 +/-    1.38      16.3 +/-    1.38  0.030 / 0.040
G17     199.7          10.5               -7.6 +/-    5.04     -21.0 +/-    5.04  0.160 / 0.290
G18     107.4          14.6                9.8 +/-    1.60      24.7 +/-    1.60  0.170 / 0.320
G27     37.8           10.5                7.1 +/-    4.56      19.5 +/-    4.56  0.030 / 0.030
G28     270.0          50.6                8.2 +/-    2.60      10.2 +/-    2.60  0.040 / 0.030
G30     327.8          56.7                7.7 +/-    0.39       9.0 +/-    0.39  0.050 / 0.080