PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-03:58:00
G01     320.0          15.2               -8.1 +/-   34.95     -19.9 +/-   34.95  0.180 / 0.370
G08     259.6          14.8                8.4 +/-    1.21      21.0 +/-    1.21  0.140 / 0.360
G10     74.8           54.8                5.8 +/-    0.34       7.0 +/-    0.34  0.040 / 0.060
G11     305.5          21.8                5.7 +/-    2.47      12.1 +/-    2.47  0.040 / 0.060
G14     282.8          68.5                6.6 +/-    0.46       7.0 +/-    0.46  0.040 / 0.040
G18     307.4          37.9                5.9 +/-    1.39       8.9 +/-    1.39  0.040 / 0.040
G20     90.2           52.4               10.3 +/-    0.81      12.6 +/-    0.81  0.080 / 0.280
G27     226.3          10.8                8.9 +/-    3.66      24.5 +/-    3.66  0.090 / 0.290
G31     174.8          40.4                8.5 +/-    1.26      12.3 +/-    1.26  0.150 / 0.470
G32     5.7            68.6                7.0 +/-    0.41       7.5 +/-    0.41  0.160 / 0.500