PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-02:28:10
G01     117.0          19.1                7.2 +/-    1.56      16.2 +/-    1.56  0.030 / 0.030
G07     90.1           63.0                5.7 +/-    0.47       6.4 +/-    0.47  0.030 / 0.040
G08     43.3           27.0                2.8 +/-    1.68       5.3 +/-    1.68  0.040 / 0.050
G09     175.6          22.6                5.9 +/-    0.91      12.3 +/-    0.91  0.050 / 0.050
G11     101.3          41.0                6.6 +/-    0.69       9.4 +/-    0.69  0.130 / 0.220
G13     316.3          21.7                0.7 +/-    2.14       1.5 +/-    2.14  0.110 / 0.230
G17     201.0          29.4                6.1 +/-    2.24      10.8 +/-    2.24  0.070 / 0.290
G18     87.8           21.1                4.4 +/-    0.96       9.4 +/-    0.96  0.070 / 0.270
G28     293.0          56.8                4.6 +/-    1.19       5.3 +/-    1.19  0.030 / 0.040
G30     347.8          69.8                2.4 +/-    1.19       2.6 +/-    1.19  0.030 / 0.030