PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-01:57:40
G01     58.6           30.0                5.3 +/-    0.48       9.3 +/-    0.48  0.040 / 0.050
G06     181.1          14.9                9.1 +/-    2.37      22.6 +/-    2.37  0.040 / 0.060
G07     143.0          21.1                6.9 +/-    0.88      14.8 +/-    0.88  0.040 / 0.030
G11     48.8           24.8                5.0 +/-    0.85       9.7 +/-    0.85  0.020 / 0.030
G13     261.7          34.5                7.1 +/-    1.02      11.3 +/-    1.02  0.190 / 0.330
G15     291.7          16.8                4.5 +/-    1.86      10.8 +/-    1.86  0.200 / 0.350
G17     261.7          75.8                7.1 +/-    0.67       7.2 +/-    0.67  0.060 / 0.080
G19     234.7          52.5                7.4 +/-    2.44       9.0 +/-    2.44  0.050 / 0.090
G28     39.3           55.8                5.4 +/-    0.62       6.3 +/-    0.62  0.070 / 0.220
G30     143.8          46.4                8.2 +/-    0.72      10.8 +/-    0.72  0.070 / 0.150