PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/30-04:12:50
G01     66.1           32.1                3.9 +/-    0.67       6.6 +/-    0.67  0.050 / 0.130
G07     139.3          24.9                6.5 +/-    0.86      12.7 +/-    0.86  0.060 / 0.140
G11     50.1           26.6                2.8 +/-    1.68       5.4 +/-    1.68  0.060 / 0.110
G13     268.8          37.3                5.4 +/-    1.04       8.3 +/-    1.04  0.080 / 0.110
G15     299.9          15.4               -0.3 +/-    1.20      -0.6 +/-    1.20  0.040 / 0.050
G17     244.4          75.4                6.4 +/-    0.60       6.6 +/-    0.60  0.040 / 0.060
G18     43.4           13.5                0.6 +/-    1.38       1.5 +/-    1.38  0.090 / 0.200
G19     226.8          43.8                8.0 +/-    1.02      11.0 +/-    1.02  0.090 / 0.190
G28     22.0           59.3                5.1 +/-    0.63       5.8 +/-    0.63  0.030 / 0.030
G30     139.6          59.3                6.8 +/-    0.76       7.8 +/-    0.76  0.040 / 0.040